Friday, September 28, 2007

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Thursday, September 13, 2007

TOURISM IN THE WORLD

Pilgrimage

View of Machu Picchu, Peru

View of Machu Picchu, Peru

The history of European tourism can perhaps be said to originate with the medieval pilgrimage. Although undertaken primarily for religious reasons, the pilgrims in the Canterbury Tales quite clearly saw the experience as a kind of holiday (the term itself being derived from the 'holy day' and its associated leisure activities). Pilgrimages created a variety of tourist aspects that still exist - bringing back souvenirs, obtaining credit with foreign banks (in medieval times utilising international networks established by Jews and Lombards), and making use of space available on existing forms of transport (such as the use of medieval English wine ships bound for Vigo by pilgrims to Santiago De Compostela). Pilgrimages are still important in modern tourism - such as to Lourdes or Knock in Ireland. But there are modern equivalents - Graceland and the grave of Jim Morrison in Père Lachaise Cemetery.

During the seventeenth century, it became fashionable in England to undertake a Grand Tour. The sons of the nobility and gentry were sent upon an extended tour of Europe as an educational experience. The eighteenth century was the golden age of the Grand Tour, and many of the fashionable visitors were painted at Rome by Pompeo Batoni. A modern equivalent of the Grand Tour is the phenomenon of the backpacker, although cultural holidays, such as those offered by Swann-Hellenic, are also important.

Health tourism

Health tourism has always existed, but it was not until the eighteenth century that it became important. In England, it was associated with spas, places with supposedly health-giving mineral waters, treating diseases from gout to liver disorders and bronchitis. The most popular resorts were Bath, Cheltenham, Buxton, Harrogate, and Tunbridge Wells. Visits to take 'the waters' also allowed the visitors to attend balls and other entertainments. Continental Spas such as Carlsbad (Karlovy Vary) attracted many fashionable travellers by the nineteenth century.

It could be argued that Britain was the home of the seaside holiday. In travelling to the coast, the population was following in the steps of Royalty. King George III made regular visits to Weymouth when in poor health. At the time, a number of doctors argued the benefits of bathing in sea water, and sea bathing as a widespread practice was popularised by the Prince Regent (later George IV), who frequented Brighton for this purpose.

Leisure travel

The Colca Canyon in Arequipa, Peru

The Colca Canyon in Arequipa, Peru

Leisure travel was associated with the industrialisation of United Kingdom – the first European country to promote leisure time to the increasing industrial population. Initially, this applied to the owners of the machinery of production, the economic oligarchy, the factory owners, and the traders. These comprised the new middle class. Cox & Kings were the first official travel company to be formed in 1758. Later, the working class could take advantage of leisure time.

The British origin of this new industry is reflected in many place names. At Nice, one of the first and best-established holiday resorts on the French Riviera, the long esplanade along the seafront is known to this day as the Promenade des Anglais; in many other historic resorts in continental Europe, old well-established palace hotels have names like the Hotel Bristol, the Hotel Carlton or the Hotel Majestic - reflecting the dominance of English customers.

Winter tourism

Ski Tourists at the  Pyongchang Ski Resort, Gangwon-do, Korea.

Ski Tourists at the Pyongchang Ski Resort, Gangwon-do, Korea.

Winter sports were largely invented by the British leisured classes, initially at the Swiss village of Zermatt (Valais), and St Moritz in 1864. The first packaged winter sports holidays took place in 1902 at Adelboden, Switzerland. Winter sports were a natural answer for a leisured class looking for amusement during the coldest season.

The Fun Ski & Snow Festival, which has been organized annually by Korea tourism organization since 1998 and participated by about 10,000 tourists from Asia, is one of the most successful winter tourism products in Asia. The festival provides a variety of events such as ski and sled competitions, ski and snow board lessons, performances and recreational activities. Majority of the event participants are foreign visitors who come from countries with a warm climate that have no snow. The event offers them opportunities to enjoy winter and winter sports in Korea. In addition, southern South American countries making up the Patagonia region in Chile and Argentina attract thousands of tourists every year. Skiing is extremely popular in the mountainous areas.

Mass tourism

Tourists at the Trevi Fountain, Rome, Italy.

Tourists at the Trevi Fountain, Rome, Italy.

La Caleta beach in Cádiz, Spain.

La Caleta beach in Cádiz, Spain.

Malá Strana (Lesser Quarter) packed with tourists on a busy summer day in Prague, Czech Republic.

Malá Strana (Lesser Quarter) packed with tourists on a busy summer day in Prague, Czech Republic.

Mass travel could only develop with improvements in technology allowed the transport of large numbers of people in a short space of time to places of leisure interest, and greater numbers of people began to enjoy the benefits of leisure time.

In the United States, the first great seaside resort, in the European style, was Atlantic City, New Jersey, and Long Island.

In Continental Europe, early resorts included Ostend (for the people of Brussels), and Boulogne-sur-Mer (Pas-de-Calais) and Deauville (Calvados) (for Parisians).

In Britain

The pioneer of modern mass tourism was Thomas Cook who, on 5 July 1841, organized the first package tour in history. He arranged for the rail company to charge one shilling per person for a group of 570 temperance campaigners from Leicester to a rally in Loughborough, eleven miles away. Cook was paid a share of the fares actually charged to the passengers, as the railway tickets, being legal contracts between company and passenger, could not have been issued at his own price. There had been railway excursions before, but this one included entrance to an entertainment held in private grounds, rail tickets and food for the train journey. Cook immediately saw the potential of a convenient 'off the peg' holiday product in which everything was included in one cost. He organised packages inclusive of accommodation for the Great Exhibition, and afterwards pioneered package holidays in both Britain (particularly in Scotland) and on the European continent (where Paris and the Alps were the most popular destinations).

He was soon followed by others (the Polytechnic Touring Association, Dean and Dawson etc.), with the result that the tourist industry developed rapidly in late Victorian Britain. Initially it was supported by the growing middle classes, who had time off from their work, and who could afford the luxury of travel and possibly even staying for periods of time in boarding houses.
The Bank Holidays Act 1871 introduced a statutory right for workers to take holidays, even if they were not paid at the time. By the last quarter of the nineteenth century, the tradition of the working class holiday had become firmly established in Britain. These were largely focused upon the seaside resorts.

The spread of the railway network in the nineteenth century resulted in the growth of Britain's seaside towns by bringing them within easy distance of Britain's urban centres. Blackpool was created by the construction of a line to Fleetwood, and some resorts were promoted by the railway companies themselves - Morecambe by the Midland Railway and Cleethorpes by the Great Central Railway. Other resorts included Scarborough in Yorkshire, servicing Leeds and Bradford; Weston-super-Mare in Somerset, catering for the inhabitants of Bristol; and Skegness, patronised by the residents of the industrial East Midlands. The cockneys of London flocked to Southend-on-Sea, mainly by Thames Steamer, and the South Coast resorts such as Broadstairs, Brighton, and Eastbourne were only a train ride away, with others further afield such as Bournemouth, Bognor Regis and Weymouth.

For a century, domestic tourism was the norm, with foreign travel being reserved for the rich or the culturally curious. A number of inland destinations, such as the English Lake District, and Snowdonia appealed to those who liked the countryside and fine scenery. The holiday camp began to appear in the 1930s, but this phenomenon really expanded in the post-war period. Butlins and Pontins set this trend, but their popularity waned with the rise of overseas package tours and the increasing comforts to which visitors became accustomed at home. Towards the end of the 20th century this market has been revived by the upmarket inland resorts of Dutch company Center Parcs.

Cox & Co, the forebear of Cox & Kings were in existence from 1758 largely entwined with the travel arrangements for the British Army serving around the Empire. While acting as 'agents' for various regiments, they organised the payment, provision, clothing and travel arrangements for members of the armed forces. In the 19th century their network of offices contained a banking and also travel department. The company became heavily involved with affairs in India and its Shipping Agency had offices in France and the Middle East.

Other phenomena that helped develop the travel industry were paid holidays:

  • 1.5 million manual workers in Britain had paid holidays by 1925

  • 11 million by 1939 (30% of the population in families with paid holidays)

NGOs and government agencies may sometimes promote a specific region as a tourist destination, and support the development of a tourism industry in that area. The contemporary phenomenon of mass tourism may sometimes result in overdevelopment; alternative forms of tourism such as ecotourism seek to avoid such outcomes by pursuing tourism in a sustainable way.

International

Increasing speed on railways meant that the tourist industry could develop internationally. To this may be added the development of sea travel. By 1901, the number of people crossing the English Channel from England to France or Belgium had passed 0.5 million per year. Shipping companies were anxious to fill cabin space that was under utilised.

For example, P&O found that the majority of their passengers for India and the Far East joined the ship at Marseilles. Consequently, they marketed holidays based upon sea trips from London to Lisbon and Gibraltar. Other companies diverted their older ships to operate cruises in the summer months.

However, the real age of international mass travel began with the growth of air travel after World War Two. In the immediate post-war period, there was a surplus of transport aircraft, such as the popular and reliable Douglas Dakota, and a number of ex military pilots ready to fly them. They were available for charter flights, and tour operators began to use them for European destinations, such as Paris and Ostend.

Vladimir Raitz pioneered modern package tourism when on 20 May 1950 his recently founded company, Horizon, provided arrangements for a two-week holiday in Corsica. For an all inclusive price of £32.10s.-, holiday makers could sleep under canvas, sample local wines and eat a meal containing meat twice a day - this was especially attractive due to the continuing austerity measures in post-war United Kingdom. Within ten years, his company had started mass tourism to Palma (1952), Lourdes (1953), Costa Brava (1954), Sardinia (1954), Minorca (1955), Porto (1956), Costa Blanca (1957) and Costa del Sol (1959).

These developments coincided with a significant increase in the standard of living in Britain. Further, the contribution of affordable air travel in combination with the package tour enabled international mass tourism to develop. The postwar introduction of an international system of airline regulation was another important factor. The bilateral agreements at the heart of the system fixed seat prices, and airlines could not fill blocks of empty seats on underused flights by discounting. But if they were purchased by a tour operator and hidden within the price of an inclusive holiday package, it would be difficult to prove that discounting had taken place - even though it was obvious that it had!

Another significant development also happened at the end of this decade. The devaluation of the Spanish peseta made Spain appear a particularly attractive destination. The cheapness of the cost of living attracted increasing numbers of visitors. Mass package tourism has at times been an exploitative process, in which tour operators in a country with a high standard of living make use of development opportunities and low operating costs in a country with a lower standard of living. However, as witness the development of many tourist areas in previously poor parts of the world, and the concomitant rise in standards of living, when there is equality of bargaining power, both parties can gain economic benefits from this arrangement.

Spain and the Balearic Islands became major tourist destinations, and development probably peaked in the 1980s. At the same time, British tour operators developed the Algarve in Portugal. The continuing search for new, cheaper, destinations spread mass tourism to the Greek Islands, Italy, Tunisia, Morocco, Turkey, and more recently Croatia.

For someone living in greater London, Venice today is almost as accessible as Brighton was 100 years ago. Consequently, the British seaside resort experienced a marked decline from the 1970s onwards. Some, such as New Brighton, Merseyside have disappeared. Others have reinvented themselves, and now cater to daytrippers, the weekend break market or business conferences.

Wednesday, September 12, 2007

THE VACATION


Vacation is a term used in English-speaking North America to describe a lengthy time away from work or school, a trip abroad, or simply a pleasure trip away from home, such as a trip to the beach that lasts several days or longer. In the rest of the English-speaking world the word holiday is used, whereas in North America, "holiday" normally applies to a specific national holiday or long weekend related to such a day. In some cases "vacation holiday" is used in North America, which signifies that a vacation trip is taken during a traditional national holiday period, extended on either end of the period by taking additional time off from work—creating a longer time unencumbered by work, an extended "long weekend", as it were. This practice is common in the United States where employers give far fewer annual vacation days (see below) than European employers—so stretching the related national holidays tends to conserve one's accumulated total of eligible days available for longer quality vacation excursions.

In England the word "vacation" referred specifically to the long summer break taken by the law courts (and later universities)—a custom introduced by William the Conqueror from Normandy where it was intended to facilitate the grape harvest. The French term is similar to the American English: "Les Vacances." The term derives from the fact that, in the past, upper-class families would literally move to a summer home for part of the year, leaving their usual family home vacant.

Most countries around the world have labor laws mandating a certain number of days of time off per year to be given to a worker. In Canada the legal minimum is two weeks, while in most of Europe the limit is significantly higher. Neither the U.S. nor China requires that employees receive any vacation time at all. There are movements fighting for laws requiring more vacation time for American workers such as timeday.org.

In modern employment practice, vacation days are often coupled with Sick leave, official holidays, and sometimes personal days.

Americans and Canadians, especially those of recent British or European descent, may also use the word "holiday." "Annual Leave" is another expression used in Commonwealth countries. Many Canadians use both "holiday" and "vacation"; "...I'm taking holidays..." is a common expression, something not often heard in the United States.


ALL ABOUT GOLF

Etymology

The word golf was first mentioned in writing in 1457 on a Scottish statute on forbidden games as gouf, possibly derived from the Scots word goulf (variously spelled) meaning "to strike or cuff". This word may, in turn, be derived from the Dutch word kolf, meaning "bat," or "club," and the Dutch sport of the same name. But there is an even earlier reference to the game of golf and it is believed to have happened in 1452 when King James II banned the game because it kept his subjects from their archery practice.

History

Main article: History of golf

Golf is a very old game of which the exact origins are unclear. The origin of golf is open to debate as to being Chinese, Dutch or Scottish. However, the most accepted golf history theory is that this sport originated from Scotland in the 1100s.

A game somewhat similar to golf was first mentioned in Dōngxuān Records (Chinese: 東軒錄), a Chinese book of 11th Century. It was also mentioned in February 26 in the year 1297 in the Netherlands in a city called Loenen aan de Vecht. Here the Dutch played a game with a stick and leather ball. Whoever hit the ball into a target several hundreds of meters away the most number of times, won.

However, modern golf is considered to be a Scottish invention, as the game was mentioned in two 15th century laws prohibiting the playing of the game of gowf. Some scholars have suggested that this refers to another game which is more akin to modern shinty, hurling or field hockey than golf. A game of putting a small ball in a hole in the ground using clubs was played in 17th century Netherlands. The word golf derives from the Dutch kolf meaning stick, club or bat (see: Kolven). Flourishing trade over the North Sea during the Middle Ages and early Modern Period led to much language interaction between Scots, Dutch, Flemish and other languages. There are reports of even earlier accounts of golf from continental Europe.

The oldest playing golf course in the world is The Old Links at Musselburgh Racecourse. Evidence has shown that golf was played on Musselburgh Links in 1672 although Mary, Queen of Scots reputedly played there in 1567.

Golf courses have not always had eighteen holes. The St Andrews Links occupy a narrow strip of land along the sea. As early as the 15th century, golfers at St Andrews, in Fife, established a customary route through the undulating terrain, playing to holes whose locations were dictated by topography. The course that emerged featured eleven holes, laid out end to end from the clubhouse to the far end of the property. One played the holes out, turned around, and played the holes in, for a total of 22 holes. In 1764, several of the holes were deemed too short, and were therefore combined. The number was thereby reduced from 11 to nine, so that a complete round of the links comprised 18 holes.

The major changes in equipment since the 19th century have been better mowers, especially for the greens, better golf ball designs, using rubber and man-made materials since about 1900, and the introduction of the metal shaft beginning in the 1930s. Also in the 1930s the wooden golf tee was invented. In the 1970s the use of metal to replace wood heads began, and shafts made of graphite composite materials were introduced in the 1980s.

World popularity

In 2005 Golf Digest calculated that there were nearly 32,000 golf courses in the world, approximately half of them in the United States.[8] The countries with most golf courses in relation to population, starting with the best endowed were: Scotland, New Zealand, Australia, Republic of Ireland, Northern Ireland, Canada, Wales, United States, Sweden, and England (countries with fewer than 500,000 people were excluded). Apart from Sweden, all of these countries have English as the majority language, but the number of courses in new territories is increasing rapidly. For example the first golf course in the People's Republic of China opened in the mid-1980s, but by 2005 there were 200 courses in that country.

The professional sport was initially dominated by Scottish then English golfers, but since World War I, America has produced the greatest quantity of leading professionals. Other Commonwealth countries such as Australia and South Africa are also traditional powers in the sport. Since around the 1970s, Japan, Scandinavian and other Western European countries have produced leading players on a regular basis. The number of countries with high-class professionals continues to increase steadily, especially in East Asia. South Korea is notably strong in women's golf.

The last decade or so has seen a marked increase in specialised golf vacations or holidays worldwide. This demand for travel which is centered around golf has led to the development of many luxury resorts which cater to golfers and feature integrated golf courses.

Golf course

Main article: Golf course

The famous 17th hole of the TPC at Sawgrass Stadium Course.

The famous 17th hole of the TPC at Sawgrass Stadium Course.

Golf is played in an area of land designated a golf course. A course consists of a series of holes, each consisting of a teeing area, fairway, rough and other hazards, and the green with the pin and cup. A typical golf course consists of eighteen holes, but many have only nine.

Play of the game

Every game of golf is based on playing a number of holes in a given order. A round typically consists of 18 holes that are played in the order determined by the course layout. On a nine-hole course, a standard round consists of two successive nine-hole rounds. A hole of golf consists of hitting a ball from a tee on the teeing box (a marked area designated for the first shot of a hole, a tee shot), and once the ball comes to rest, striking it again. This process is repeated until the ball is in the cup. Once the ball is on the green (an area of finely cut grass) the ball is usually putted (hit along the ground) into the hole. The goal of resting the ball in the hole in as few strokes as possible may be impeded by various hazards, such as bunkers and water hazards.

Players walk (or drive in motorized carts) over the course, either singly or in groups of two, three, or four, sometimes accompanied by caddies who carry and manage the players' equipment and give them advice. Each player plays a ball from the tee to the hole, except that in the mode of play called foursomes two teams of two players compete, and the members of each team alternate shots using only one ball until the ball is holed out. When all individual players or teams have brought a ball into play, the player or team whose ball is the farthest from the hole is next to play. In some team events a player whose ball is farther from the hole may ask his partner to play first. When all players of a group have completed the hole, the player or team with the best score on that hole has the honor, that is, the right to tee off first on the next tee.

Each player acts as marker for one other player in the group, that is, he or she records the score on a score card. In stroke play (see below), the score consists of the number of strokes played plus any penalty strokes incurred. Penalty strokes are not actually strokes but penalty points that are added to the score for violations of rules or utilizing relief procedures.

Par

A hole is classified by its par, the number of strokes a skilled golfer should require to complete play to the hole. For example, a skilled golfer expects to reach the green on a par-four hole in two strokes, one from the tee (the "drive") and another, second, stroke to the green (the "approach") and then roll the ball into the hole with two putts. Traditionally, a golf hole is either a par-three, -four or -five; some par-six holes exist, but are not usually found on traditional golf courses.

Primarily, but not exclusively, the par of a hole is determined by the tee-to-green distance. A typical length for a par-three hole ranges between 91 and 224 metres (100–250 yd), for a par-four hole, between 225 and 434 metres (251–475 yd). Typically, par-five holes are at between 435 and 630 metres (476–690 yd), and nontraditional par-six holes are any longer distance. These distances are not absolute rules; for example, it is possible that a 500-yard hole could be classed as a par-four hole, since the par for a hole is determined by its 'effective playing length'. If the tee-to-green distance on a hole is predominantly downhill, it will play shorter than its physical length and may be given a lower par rating.

Many eighteen hole courses have four par-three, ten par-four, and four par-five holes, though other combinations exist and are not less worthy than courses of par 72. Many major championships are contested on courses playing to a par of 70 or 71, and it's not rare to find a worthy test (especially in the British Isles) playing to a par of 69 or lower. In many countries, courses are classified, in addition to the course's par, with a course classification describing the play difficulty of a course and may be used to calculate a golfer's playing handicap for that given course (c.f. golf handicap).

The par scoring system can be seen as a way to facilitate the comparison of all golfers' progress around the course in stroke play by providing a common reference score. For example, if player A after completing hole #4 has a cumulative score equal to par (say, 16 strokes), and player B has a cumulative score equal to -1 after hole #6 (say, 23 strokes), then one is able to see more easily that player B has played relatively better than player A, than by comparing their cumulative numbers of strokes (16 vs. 23).

Scoring

In every form of play, the goal is to play as few strokes per round as possible. Scores for each hole can be described as follows:

Term on a
scoreboard

Specific term

Definition

-4

Condor or Vulture (or triple-eagle)

four strokes under par

-3

Albatross (or double-eagle)

three strokes under par

-2

Eagle (or double-birdie)

two strokes under par

-1

Birdie

one stroke under par

0

Par

strokes equal to par

+1

Bogey

one stroke more than par

+2

Double bogey

two strokes over par

+3

Triple bogey

three strokes over par

A snowman (perhaps 4 over par on a par 4 hole) is an informal term in some countries for a score indicating that 8 shots were taken at a single hole.[9]

The two basic forms of playing golf are match play and stroke play.

  • In match play, two players (or two teams) play each hole as a separate contest against each other. The party with the lower score wins that hole, or if the scores of both players or teams are equal the hole is "halved" (drawn). The game is won by the party that wins more holes than the other. In the case that one team or player has taken a lead that cannot be overcome in the number of holes remaining to be played, the match is deemed to be won by the party in the lead, and the remainder of the holes are not played. For example, if one party already has a lead of six holes, and only five holes remain to be played on the course, the match is over. At any given point, if the lead is equal to the number of holes remaining, the match is said to be "dormie", and is continued until the leader increases the lead by one hole, thereby winning the match, or until the match ends in a tie. When the game is tied after the predetermined number of holes have been played, it may be continued until one side takes a one-hole lead, and thereupon immediately wins by one hole.

  • In stroke play, every player (or team) counts the number of shots taken for the whole round or tournament to produce the total score, and the player with the lowest score wins. A variant of stroke play is Stableford scoring, where a number of points (two for the target score) are given for each hole, and the fewer shots taken, the more points obtained, so the aim is to have as many points as possible. Another variant of stroke play, the Modified Stableford method, awards points on each hole in relation to par and then adds the points over a round; for more details on this method, see the article on The INTERNATIONAL, a now-defunct PGA Tour tournament that used Modified Stableford scoring.

There are many variations of these basic principles, some of which are explicitly described in the "Rules of Golf" and are therefore regarded "official." "Official" forms of play are, among others, foursome and four-ball games.

Fees

One must pay certain fees to play on a golf course. There are two different fees; the cart fee, which is for the use of a golf cart, and the greens fee, which allows play on the course itself. On some courses, walking is prohibited, and the cart fee is often included with the greens fee.

The greens fee may vary from the equivalent of a few dollars for communal (also known as municipal) courses in many countries, up to that of several hundred dollars for public courses; e.g., greens fees at Pebble Beach can run over $850 as of Spring 2007. Discounts on fees may be offered for players starting their round late (and on many courses, unusually early) in the day. Prices may also vary for seniors and minors, or depending on the season.

[edit] Team play

A foursome (defined in Rule 29) is played between two teams of two players each, in which each team has only one ball and players alternate playing it. For example, if players A and B form a team, A tees off on the first hole, B will play the second shot, A the third, and so on until the hole is finished. On the second hole, B will tee off (regardless who played the last putt on the first hole), then A plays the second shot, and so on. Foursomes can be played as match play or stroke play.

A four-ball (Rules 30 and 31) is also played between two teams of two players each, but every player plays his own ball and for each team, the lower score on each hole is counted. Four-balls can be played as match play or stroke play.

There are also popular unofficial variations on team play. In a scramble, each player in a team tees off on each hole, and the players decide which shot was best. Every player then plays his second shot from within a clublength of where the best ball has come to rest, and the procedure is repeated until the hole is finished. In a Texas scramble, the same rules apply but at least four drives of each member of the team must be used during the course of the round. In best ball, each player plays the hole as normal, but the lowest score of all the players on the team counts as the team's score.

In a greensome, also called modified alternate shot, both players tee off, and then pick the best shot as in a scramble. The player who did not shoot the best first shot plays the second shot. The play then alternates as in a foursome.

A variant of greensome is sometimes played where the opposing team chooses which of their opponent's tee shots the opponents should use. The player who did not shoot the chosen first shot plays the second shot. Play then continues as a greensome. Such a format is known as either gruesomes, bloodsomes or gruesome greensomes.

There is also a form of starting called "shotgun," which is mainly used for tournament play. A "shotgun start" consists of groups starting at different tees, allowing for all players to start and end their round at the same time.

Handicap systems

Main article: Golf handicap

A handicap is a numerical measure of an amateur golfer's ability to play golf over 18 holes. The 2 main formulas used in the game are stroke play (also known as brutto or medal) and match play.

The Stroke play formula is an individual way of playing the game as you are competing against the par of the course. The Stroke play formula is simply the sum of strokes a player shoots over 18 holes and compares it to the par (or the sum of a theoretical number of strokes of an expert player per hole added up over 18 holes). The difference between your number of strokes and the par determines your handicap.

The match play formula is a game during which two players play against each other. In other words, your score per hole depends on the other player's score. This formula was - and still is - very much appreciated by golfers as the state of mind is totally different from a stroke play game, during which the golfer has to 'secure' each and single of his shots in order to play the lower score (number of strokes) possible over 18 holes. In the contrary, the match play rule will allow the player to approach the course in a more aggressive manner in order to win the hole against his opponent. e.g. P1 plays 4 and P2 plays 5: P1 wins the hole and current score on the tee number 2 would be '1 up'. If P2 would like to mention the status of the score, he would say: '1 down' (each player announces his position towards the game).

The so-called "net" score is a formula commonly preferred by players from different proficiency to play against each other on equal terms. Good Ones handicap is subtracted from their round score thus making a game even between two players. e.g. player 1's round score: 90, handicap: 20, the course's par: 70, Player 2's round score: 100, handicap: 30, overall (par): 70. a players handicap determines the quality of their game making a player with a lower handicap better than one with a higher handicap. However, in practice, motivated and ambitious high handicap players strive to lower their handicaps and thus the current official one they show on their cards might not be their real current level, which consequently might put them in a favourable position when playing 'net' formula games.

Handicaps are complicated, but essentially are the average over par of a number of previous rounds, adjusted for course difficulty. Legislations regarding the calculation of handicaps differs among countries and sometimes becomes so complicated that a golfer's handicap might not always mirror his real level of play. For example, Swiss handicap rules include the difficulty of the course the golfer is playing on by taking into consideration factors such as the number of bunkers, the length of the course, the difficulty and slopes of the greens, the width of the fairways, and so on.

Handicap systems are not used in professional golf. Professional golfers often score several strokes below par for a round and thus have a handicap of 0, subtracting 0 from their round score. Someone with a zero handicap is often referred to as a 'scratch golfer.'

Rules and other regulations

The rules of golf are internationally standardised and are jointly governed by the Royal and Ancient Golf Club of St Andrews (R&A), which was founded 1754 and the United States Golf Association (USGA). By agreement with the R&A, USGA jurisdiction on the enforcement and interpretation of the rules is limited to the United States and Mexico. The national golf associations of other countries use the rules laid down by the R&A and there is a formal procedure for referring any points of doubt to the R&A.

The underlying principle of the rules is fairness. As stated on the back cover of the official rule book: "play the ball as it lies", "play the course as you find it", and "if you can't do either, do what is fair". Some rules state that:

  • every player is entitled and obliged to play the ball from the position where it has come to rest after a stroke, unless a rule allows or demands otherwise (Rule 13-1)

  • a player must not accept assistance in making a stroke (Rule 14-2)

  • the condition of the ground or other parts of the course may not be altered to gain an advantage, except in some cases defined in the rules

  • a ball may only be replaced by another during play of a hole if it is destroyed (Rule 5-3), lost (Rule 27-1), or unplayable (Rule 28), or at some other time permitted by the Rules. The player may always substitute balls between the play of two holes.

The Decisions on the Rules of Golf are based on formal case decisions by the R&A and USGA and are revised and updated every other year.

There are strict regulations regarding the amateur status of golfers.[13] Essentially, everybody who has ever received payment or compensation for giving instruction or played golf for money is not considered an amateur and may not participate in competitions limited solely to amateurs. However amateur golfers may receive expenses which comply with strict guidelines and they may accept non-cash prizes within the limits established by the Rules of Amateur Status.

In addition to the officially printed rules, golfers also abide by a set of guidelines called Golf etiquette. Etiquette guidelines cover matters such as safety, fairness, easiness and pace of play, and a player's obligation to contribute to the care of the course. Though there are no penalties for breach of etiquette rules, players generally follow the rules of golf etiquette in an effort to improve everyone's playing experience.

Hitting a golf ball

To hit the ball, the club is swung at the motionless ball on the ground (or wherever it has come to rest) from a side stance. Many golf shots make the ball travel through the air (carry) and roll out for some more distance (roll).

Every shot is a compromise between length and precision, and long shots are often less precise than short ones. Obviously, a longer shot may result in a better score if it helps reduce the total number of strokes for a given hole, but the benefit may be more than outweighed by additional strokes or penalties if a ball is lost, out of bounds, or comes to rest on difficult ground. Therefore, a skilled golfer must assess the quality of his or her shots in a particular situation in order to judge whether the possible benefits of aggressive play are worth the risks.

[edit] Poor shots

There are several possible causes of poor shots, such as poor alignment of the club, wrong direction of swing, and off-center hits where the clubhead rotates around the ball at impact. Many of these troubles are aggravated with the "longer" clubs and higher speed of swing. Furthermore, the absolute effect of a deviation will increase with a longer shot compared with a short one.

For many people who play golf, the number and variety of poor shots is larger than they would like. Consequently, many, many words have been found to describe the shots--some of them are quite colourful. Some of the more common terms for the poor shots are explained below:

  • Hook : The ball flight curves sharply to the left for a right-handed player (to the right for left-handed players). A severe hook is commonly called a Duck-Hook or a Snap hook.

  • Slice : The ball curves sharply to the right for a right-handed player (to the left for left-handed players). For beginning golfers this is the typical outcome of most shots. A severe slice is commonly referred to as a Banana-Slice or a Banana-Ball.

  • Pull : For a right-handed player the ball is 'pulled' across the body and flies to the left of the intended target without curvature (the ball flies to the right for left-handed players). A Pull-Hook indicates that the ball started out left of target and curved even further to the left. A Pull-Slice means the ball starts out left then curves back to the right.

  • Push : The opposite of a Pull, where the ball is 'pushed' away from the body. The ball flies to the right of the intended target for right-handed players (to the left for left-handed players). A Push-Slice indicates that the ball started out right of target and curved even further to the right. A Push-Hook means the ball starts out right then curves back to the left.

  • Shank or Lateral : The ball is struck by the hosel or the outer edge of the club rather than the clubface and shoots sharply to the right for a right-handed player.

  • hitting it thin or Blade or Skull : The ball is struck with the bottom edge of the club and not its face. This may damage the surface of a golf ball with a soft cover material, and may result in a stinging sensation in one's hands on a cold day.

  • hitting it fat/chunk it : A fat shot occurs when the club strikes the ground before the ball. A large divot is usually produced along with a clubface covered in the divot.

  • Top/duff/dub/grounder : The topside of the ball is struck with the blade of the club. The result usually consists of the ball rolling forward on the ground with much topspin.

  • Sky Ball or Pop-Up : The opposite of a Top. This occurs most frequently when teeing the ball up too high, though sometimes a Sky Ball will occur when the ball is sitting on top of long blades of grass and the club has space to pass under the ball. The top side of the club strikes the bottom side of the ball and forces the ball higher into the air than desired. A true sky ball occurs when the ball travels farther vertically than it does horizontally (although this is sometimes intentionally done with high loft clubs).

  • Double-Hit : Hitting the ball twice in one swing. This occurs most often in chipping or pitching, and is extremely rare in any other kind of shot. This is commonly referred to as a T.C. Chen, named for the Taiwanese golfer who led the 1985 U.S. Open by 5 shots on Sunday, wherein he double-hit a chip on the fifth hole and made an eight, costing him the championship.

  • Flyer : This type of shot usually occurs when playing from deep rough. Grass blades come between the club face and the ball, preventing the club face from imparting maximum backspin on the ball. This loss of lift from backspin will typically cause a lower, longer shot than a cleanly contacted shot. The resulting flight of the ball is that the target is overshot by 10 or more yards and the ball does not stop as quickly on the green.

  • Hood : Somewhere during the swing the clubface becomes more perpendicular to the ground, or angled more toward the golfer. The clubface may strike the ground first or get caught up in heavy rough. This results in the ball flying lower to the ground than intended and usually resulting in a Pull as well.

  • Wormburner, Groundhog Killer or Sally Gunnell : The ball is hit extremely low to the ground, or bounces rapidly across the ground, essentially "burning up worms" or hitting groundhogs as it speeds along.

  • Chili Dip : A common miscue while chipping where the ball is flubbed only a few feet forward. Sometimes referred to as a Chunk.

  • Foot Wedge : An illegal act of literally kicking one's ball to a better location. The character Judge Smails uses this technique in the movie Caddyshack.



  • Whiff or Air Shot : Missing the ball completely after swinging at it counts as a stroke, usually resulting in embarrassment. May be jokingly referred to as a Practice Swing.

  • Iron Hooker : Holding the club too far forward causing a flicking action which results in a major hook.

  • Gunnell/Top : A Gunnell, or Top, is a low shot where the club face makes contact with the top of the ball. Shots that go ¾ distance in this manner are usually referred to as a 'Gunnell', or 'A runner, but not a looker'. The expression originated in England, and is a reference to former Olympic hurdler Sally Gunnell.

  • Pulled a Ty-Ty : When on the tee box and you tee the ball too high and pop it up using a driver. ( known as a pop up.)

Original posting / copy from : www.wikipedia.org

Friday, September 7, 2007

Geomatika Update

Setelah diposting beberapa hari, album geomatika diharapkan untuk menampilkan lebih banyak foto lagi.
Hari ini saya tambahkan sekitar 20 foto geomatika, semoga bisa memenuhi harapan..
Makasih komentarnya (sidik), dan kritiknya (erv)




































ANTHURIUM, GAK ADA MATINYA!


anthurium1kecil.jpg

Pamor Anthurium bakal menyusul jejak kemilau popularitas aglaonema. Harga serta permintaannya melesat pesat. Banyak Nursery telah melakukan kuda-kuda guna mengantisipasi melonjaknya permintaan.

Beberapa waktu terakhir keberadaan anthurium sedang diincar banyak pecinta tanaman hias. Tak sedikit pemain nekad menukar satu pot anthurium dengan segepok uang bernilai jutaan rupiah. Demam anthurium tak hanya terjadi di jabotabek saja. Berbagai daerah lain terutama Jawa Tengah dan Jawa Timur juga mengalami kondisi serupa. “Bahkan mungkin gaungnya lebih terasa di Jawa Tengah dibandingkan dengan jakarta,” ujar Kurniawan dari Toekangkeboen, trader tanaman hias di BSD City, Tangerang.

Besarnya permintaan membuat anthurium, terutama jenis favorit, agak susah didapat. Dicari sampai tingkat petani pun belum tentu tersedia. “Sekarang coba cari ke para petani di Sawangan atau ke Gondrong, Tangerang. Barangnya sudah habis. Padahal dulu di tempat-tempat itu gudangnya anthuriu, papar Kurniawan.

Kelebihan lain yang melekat pada diri anthurium adalah sosoknya yang gagah dan terlihat megah. Tak heran kalau tanaman ini banyak dipelihara di istana kerajaan-kerajaan di masa lampau. “Tapi kenapa sekarang bisa terjadi booming, lebih banyak karena ada harapan keuntungan yang tinggi dari anthurium.

Hal senada juga diungkapkan oleh Adi, pedagang tanaman hias di kawasan Kaliurang Yogyakarta. Pria asal Malang ini telah melakukan kuda-kuda untuk menghadapi peluang melonjaknya permintaan Anthurium oleh konsumen. Ia tak ragu melakukan stok bibit Anthurium jenis jenmanii hingga ratusan jumlahnya. “Harganya memang lumayan mahal. Tapi biasanya kalau harga mulai melonjak seperti ini tidak lama lagi pasti bakal jadi trend,” terang Adi Bayi Anthurium seukuran ujung jari kelingking itu dijual seharga Rp 25 – 30 per buah.

Sejak dari awal tahun 2006 ini, OSN (Oasis Sentul Nursery) kewalahan memenuhi permintaan anthurium dari Jawa Tengah. Terutama dari daerah Solo. Beberapa pedagang dari Solo malah datang ke OSN yang berlokasi di Bogor. Sampai persediaan anthurium di OSN habis, tidak ada stok.

“Awalnya permintaan hanya pada anthurium jenis tertentu saja, seperti anthurium Jenmanii. Tapi karena sekarang banyak permintaan, stok anthurium tersebut berkurang, dan menjadi langka di pasaran. Kalaupun ada, harganya selangit. Karena itu sekarang anthurium jenis lain banyak dicari orang, dan harganya menjadi terdongkrak,” papar Novi.

Ia mencontohkan seperti anthurium sirih. Harga anthurium tersebut saat ini harganya sudah mencapai Rp 400.000 perdaun. Bahkan saat pameran di lapangan banteng, beberapa waktu lalu, ada yang harganya mencapai Rp 700.000 perdaun. Tak hanya itu, anthurium way of love juga harganya meninggi. “Padahal sebelumnya, kalau anthurium hanya jenmanii yang leading, lainnya enggak,” tambah Novi lagi.

Untuk bulan ini saja, jenmanii yang laku di OSN sekitar 15-20 pot. Dengan range harga antara Rp 1000.000-Rp 2.750.000 per pot. Dengan tinggi tanaman dari yang 70 cm sampai dengan yang 1 m lebih. “Itu harga di sini yah, nanti kalau sudah dijual lagi, harganya pasti lebih tinggi lagi,” papar Novi.

Tren anthurium memang, Novi mengakui daerah Jawa Tengah lebih dulu ketimbang Jabotabek. Ini ditandai banyak para pemain tanaman hias dari Jawa Tengah, ramai-ramai belanja anthurium di Jabotabek. “Harganya di sana juga udah gila banget. Di sini kita tunggu limpahan anthurium aja dari sana, karena banyak,” terang Novi.

Apa yang diucapkan Novi diamini oleh Ali Mas’udi, salah seorang pedagang tanaman hias yang berasal dari Kudus. Sengaja jauh-jauh ia datang dari Kudus memang untuk mencari anthurium, dan beberapa tanaman hias lainnya. “Dulu saya, kalau mau nyari anthurium mudah mendapatkannya, sekarang susahnya minta ampun. Stoknya terbatas,” papar Ali yang saat ditemui Flona tenggah berbelanja di OSN.

Ketika masih banyak stok, ia bisa sampai ribuan pot mendatangkan anthurium jenmanii ke Kudus. “Dan itu, 1-2 hari langsung habis lagi,” terang Ali yang baru 2 tahun belakangan ini menjadi pemain tanaman hias. Selain Jenmanii, anthurium lain yang dicari pembelinya adalah anthurium wafe of love. Tak heran saking banyaknya permintaan, ia menghabiskan waktu 5 hari di Jabotabek, dan 3 hari kemudian di Kudus. Selama di Jakarta, ia biasa berputar-putar mencari nursery yang bisa menyediakan berbagai macam tanaman hias yang dicarinya.

Saat ini di Kudus, menurut Ali, peminat tanaman hias sedang banyak-banyaknya. Terutama jenis anthurium. Selain anthurium, tanaman hias lainnya seperti adenium, aglaoenema, dan sansievieria juga dicari, meski tak setinggi anthurium. “Kalau dulu mungkin pedagang tanaman hias cuma sedikit, sekarang jumlahnya sudah ratusan,” jelasnya.

Ajangan pameran Flona (Flora dan Fauna) yang berlangsung bulan Agustus 2006 di lapangan Banteng – Jakarta, juga telah ikut andil menjadi pemicu kembalinya pamor anthurium. Harganya bisa tembus Rp Rp 2,5 juta per pot ukuran 18 cm. “Terutama untuk jenis Anthurium jenmanii,” ujar Ade pemain tanaman hias di daerah Serpong, Tangerang. Tak heran jika para pedagang tanaman hias saling berbisik tentang bakal ramainya lagi tanaman hias daun ini.

Jenis Jenmanii banyak diminati

Dari sekian banyak jenis anthurium, barangkali Anthurium jenmanii yang paling banyak dicari orang. Jenis ini ditandai dengan sosok daunnya yang tebal dan kaku. Harganyapun naik gila-gilaan. Kabarnya ada anthurium cobra yang laku terjual sekitar 50 juta rupiah!. Harga yang cukup mahal untuk kategori tanaman hias berdaun indah ini. Kenapa bisa mahal? “Mengikuti prinsip pasar saja. Kalau permintaannya tinggi dan stoknya tak banyak, harganya pasti akan melambung,” terang Kurniawan.

Keunggulan anthurium Jenmanii dibanding anthurium lainnya, menurut Novi, dari Oasis Sentul Nursery, terletak pada ketebalan daun. Selain itu tumbuhnya lama. “Karena itulah pasokannya jadi terbatas. Untuk menghasilkan 1 daun saja, itu memerlukan waktu yang lama sekali. Jadi itulah, kenapa anthurium ini banyak dicari orang dan harganya lumayan mahal,” papar Novi. Padahal kalau dilihat dari warna, sama seperti warna anthurium umumnya yang berwarna hijau. Jermanii yang ujungnya berwarna merah, harganya lebih mahal ketimbang jermanii yang ujungnya berwarna hijau.

Tak heran, karena kekhususan anthurium ini, ada orang yang mengkoleksinya, bukan untuk dijual. “Saya punya temen namanya Teguh, dia tinggal di Solo. Di rumahnya di Jawa sana, ia punya Jenmanii banyak sekali, dan hanya dipajang di depan rumahnya. Cuma dikumpulin doang, enggak dijual,” ucap Novi.

Ia menduga, sampai akhir tahun ini kalau ketersediaan stok masih ada, anthurium masih dinikmati banyak orang. Perputaran tanaman hias kalau tidak aglaonema, anthurium dan philodendron, hanya 3 jenis ini saja. Lainnya standar. Kalau saya lihat sih tahun ini trennya lagi anthurium. Gantian dengan aglaonema yang pada tahun lalu banyak dicari orang.

Anthurium jenmanii banyak variannya, perbedaannya adalah bentuk daunnya. Soal nama belum ada pembakuan. Tak heran kalau lantas banyak beredar nama varian jenmanii yang sangat banyak. Mulai dari yang asalnya dapur seperti centong, sendok, piring, mangkok sampai cangkir. Juga nama lain seperti golok, pedang, jaipong, kol, wayang sampai teratai. Bahkan ada yang berjuluk levis karena serat daunnya mirip kain bahan jeans.

Terkadang penamaan ini masih jadi perdebatan semisal ada yang menyebutnya golok, namun ada yang menganggap itu jenmanii pedang. Ada yang menyebut centong, sementara orang lain menjuluki sendok. Maka banyak pedagang yang tak mau mematok nama pada anthurium dagangannya. Pokoknya barangnya bentuknya seperti ini dan harganya segini, pembelinya mau enggak. Tak perlu berdebat soal nama.

Jenis lain ikut diminati

Selain jenmanii, black beauty, super boom dan neo super boom adalah jenis anthurium yang juga jadi favorit. Tak heran kalau harganya ikut naik gila-gilaan. Namun di luar jenis-jenis favorit itu, tingkat penjualan dan harga anthurium lain ikut terdongkrak. Tanduk, wave of love, keris, sirih, jari juga ikut naik mengikuti tren anthurium yang terjadi.

Melonjaknya harga Anthurium jenmanii, memicu harga anthurium jenis lain ikut meroket. Bahkan trennya mulai mengekor jenmanii. Misalnya saja jenis wave of love. Jenis ini harganya naik 2 kali lipat dari harga normal. Selain itu muncul pula jenis-jenis baru. Misalnya anthurium ratu, anthurium patrick, dan marbell queen. Berbagai jenis anthurium baru yang lain yaitu anthrium ratu, anthurium kejora.

Menurut Franky, pecinta anggrek yang juga mengoleksi Anthurium, penanaman Anthurium saat ini memang belum serapi layaknya jenis tanaman hias jenis lain. Sebut saja, Anggrek. Akibatnya, di pasaran banyak ditemui jenis Anthurium yang sama dengan nama berbeda. Bahkan, berbagai jenis tanaman yang sebenarnya bukan Anthurium sering pula disebut sebagai Anthurium.

Untung dan marjin

Anthurium termasuk tanaman yang pertumbuhannya tak terlalu cepat. Paling cepat satu daun akan muncul setelah dua sampai tiga bulan dirawat. Kalau membesarkan dari anakan biji perlu waktu bertahun-tahun untuk menjadi besar dan berbandrol mahal. Pertumbuhannya jauh lebih lambat dibanding dengan aglaonema yang bisa nambah satu daun setiap bulannya.

Makanya keuntungan dari usaha anthurium lebih banyak dari marjin harga jual dan beli. Semisal membeli dengan harga sejuta lantas dijual satu setengah juta. Sangat sulit mengharapkan laba dari pembesaran maupun budidaya dalam rentang waktu sangat singkat.

Meski begitu ada juga yang mau membeli bibit yang masih seupil. Padahal sudah saya jelaskan kalau untuk jadi besar perlu menunggu waktu sampai dua puluh tahun. Tapi kalau pembelinya memang suka dan mampu baru beli bibit mau gimana lagi. Harga jual bibit juga tergolong mahal. Semisal bibit anthurium keris yang ukuran sekitar 10 cm tingginya dihargai50 ribu, sementara black beauty dengan ukuran sama bisa sampai 300 ribu per potnya.

Anthurium termasuk barang kolekstor item, bukan tanaman hias masal seperti yang terjadi pada aglaonema. Pembudidayaannya memakan waktu lama, anthurium yang banyak beredar sekarang adalah stok lama dari para petani. Bukan baru-baru ini saja ditanam. Namun anthurium punya keunggulan dibanding aglaonema, yang sama-sama tanaman hias daun dan sedang ngetren. Yaknia lebih bandel dan perawatannya sangat mudah. Tanaman ini termasuk tahan banting dan jarang terserang penyakit.

Anthurium yang bagus bertajuk daun roset. Daunnya bertumpuk-tumpuk saling menutup seperti helaian kelopak mawar. Kalau daunnya rada sobek atau ada lubang halus, biasanya masih kita beri toleransi, asal enggak parah banget.

Cara belanja masih kuno

Harga Anthurium kini tengah melonjak. Uniknya dalam dunia tanaman hias masih banyak menerapkan cara tradisional yakni membayar dengan uang cash, meskipun ada transaksi dengan kartu kredit maupun transfer bank, jumlahnya masih sedikit. Padahal tak jarang para pemain dari Jawa Tengah misalnya memburu anthurium sampai Jabotabek karena mereka kehabisan stok. Dan kalau membeli tak hanya satuan jumlahnya tetapi puluhan dan diangkut dengan iringan truk.

Mereka datang dengan segepok uang dan membayarnya tunai. Kadang mereka membawanya dengan karung. Kita ‘khan enggak mungkin menghitung uangnya kalau jumlahnya banyak banget. Ya, kita mengandalkan saling percaya. Mudah-mudahan uangnya enggak ada yang palsu.

Maling isyaratkan tren

Pelaku pencurian tanaman hias tentu didalangi oleh oknum yang telah mengetahui seluk beluk dunia tanaman hias. Mereka mengetahui pasti peta dunia bisnis tanaman hias. Harga dan tanaman yang sedang trend sudah ada dalam benak mereka sebelum mencuri.

Sama seperti dengan halnya aglaonema. Berbagai nurseri telah menderita kerugian gara-gara anthurium mereka raib digondol kucing berkepala hitam. Nani, pedagang tanaman hias di bilangan Kaliurang Yogya mengaku telah kecolongan puluhan bibit anthurium jenmani. Pengalaman getir serupa juga disandang oleh beberapa pedagang tanaman hias di Bursa Tanaman Hias BSD City.

TIPS MEMBELI TANAMAN ANTHURIUM





Anthurium punya banyak ragam, jenis, nama populer, selain nama-nama lokal dan ukuran bermacam-macam. Misalnya saja, jangan sampai Anda membeli anthurium indukan setingi satu meter dengan bentangan 1,5 meter, jika rumah Anda sempit. Atau, hanya karena murah, Anda membeli bibit yang membutuhkan waktu lama dan kesabaran untuk merawatnya. Orang lain menyebut Anthurium golok, tapi Anda menyebut pedang, atau tombak. Anda menyebut ular kobra, tapi orang lain menganggapnya berbentuk ular sanca. Pusing kan?




Berikut adalah beberapa hal yang perlu Anda perhatikan jika tidak ingin sesat di jalan:

1. Tanaman anthurium banyak jenis dan ragamnya. Demikian juga sosok atau ukurannya. Ada yang kecil ada yang besar. Tentukan dulu ukuran anthurium jenis yang ingin Anda beli dengan menyesesuaikan tempat yang Anda miliki. Jangan sampai Anda membeli anthurium indukan setingi satu meter dengan bentangan 1,5 meter, jika rumah Anda sempit.
2. Anthurium memiliki banyak nama, termasuk memiliki nama-nama yang populer. Jangan hanya membeli nama. Ingat, yang Anda beli adalah tanaman. Jadi belilah hanya tanaman yang sehat, yang menurut hati nurani Anda bagus, apa pun jenis anthuriumnya. Nama besar tapi anthurium tersebut tidak sehat, tidak berarti apa-apa.
3. Tanaman anthurium banyak menggunakan nama-nama lokal yang umumnya sekadar menunjukkan bentuk yang menyerupai sesuatu. Terus terang, hal seperti ini bisa sangat subyektif. Orang lain menyebut Anthurium golok, mungkin saja Anda menyebut pedang, atau tombak. Anda menyebut bentuknya seperti ular kobra, tapi orang lain mungkin menganggapnya berbentuk ular sanca.
4. Anthurium termasuk tanaman yang membutuhkan waktu lama dalam pertumbuhannya, sejak dari bibit sampai menjadi tanaman yang sedap dilihat. Jangan hanya karena murah, Anda membeli bibit anthurium, apalagi yang masih dalam bentuk kecambah. Dibutuhkan waktu lama dan kesabaran untuk merawatnya. Anda harus menimbang kemampuan tersebut. Betapapun, kalau Anda mantap, dan ada uang, beli saja tanaman dewasa. Tanaman dewasa umumnya sudah enak dilihat: tumbuh kompak, subur, kuat dan bisa langsung dipajang (atau bahkan bisa langsung dijual lagi, jika ada untung).
5. Anthurium punya banyak ragam..Beli hanya di nursery langganan yang terpercaya, untuk menjamin Anda membeli tanaman yang bagus. Atau jika Anda memburu anthurium jenis tertentu, Anda tidak tertipu.. Sedikitnya, kalau salah, Anda bisa komplain.
6. Jangan malu bertanya tentang segala sesuatunya, seperti cara perawatan, pemupukan dan lain sebagainya. Malu bertanya sesat di jalan. Nursery terpercaya adalah nursery yang bisa dan siap menjawab setiap pertanyaan Anda.

(Dikutip dari buku Pesona Anthuirium Daun karangan Kurniwan Junaedhie, Penerbit Agromedia Pustaka, Jakarta)

GLOBAL POSITIONING SYSTEM


  • NAVSTAR GPS (Navigation Satellite with Timing and Ranging Global Positioning System) atau sering disingkat GPS, merupakan sistem navigasi satelit terbaru yang didesain untuk memberikan posisi dan kecepatan tiga dimensi yang teliti, dan juga informasi mengenai waktu, secara kontinyu di seluruh dunia (Abidin,2000)

  • memungkinkan pemakai mendapatkan posisi titik secara tepat dengan ketelitian yang memadai.

  • Aplikasi awalnya untuk keperluan militer, sekarang aplikasinya bisa dipakai untuk, Survey & Pemetaan (Darat/laut), Geodesi, Geodinamika, dan Deformasi, Navigasi & Transportasi, Studi Troposfir & Ionosfir, Pendaftaran Tanah, Photogrammetry/Remote Sensing, GIS, Study Kelautan ( mis Arus ), Olah raga, rekreasi.

  • GPS dikembangkan oleh Amerika Serikat sejak tahun 1973, pengembangan sistem NAVSTAR GPS dilakukan dalam 3 tahap. Tahap pertama (1973-1978) dilakukan pengujian konsep. Tahap kedua (1978-1989) dilakukan pengujian prototype pada receiver, pada tahap ini diorbitkan satelit 7 buah (blok I). Tahap ketiga adalah operasional dimulai tahun 1989, dengan diorbitkan satelit blok II sebanyak 11 buah, Konstelasi satelit-satelit NAVSTAR GPS secara penuh terdiri dari 21 satelit ditambah 3 satelit cadangan dan secara resmi sistem GPS dinyatakan operasional pada April 1994.



  • Bereferensi ke satu global datum WGS84

  • Tidak tergantung cuaca

  • Cara penentuan posisi dapat dg statik maupun bergerak (kinematik).

  • Cocok untuk semua platform ( mobil, kapal, pesawat dll )

  • Tidak memerlukan saling keterlihatan antar titik.

  • Surveyor tidak dapat memanipulasi data mentah.

  • Untuk daerah terbuka GPS dapat menggantikan fungsi Total Station. Lebih praktis, teliti dan cepat. ( stop-go, Real Time Survey )


Keterbatasan

  • Tidak dapat digunakan di tempat dimana signal GPS tidak dapat diterima. Misal: di dalam terowongan, hutan lebat, di tengah bangunan bertingkat tinggi dll

  • Pemakai tidak mempunyai wewenang dalam system GPS

  • Datum yang digunakan WGS84, untuk posisi lokal dengan MSL pengguna harus menghitung sendiri angka transformasinya.

  • Pengolahan data GPS bukan hal yang mudah.

  • Teknologinya relatif baru, hingga sumber daya masih kurang.

  • Pemakaian terkesan sangat mudah, hingga membuat operator kurang teliti, dan kurang hati-hati tehadap pekerjaannya.

  • Survey GPS memiliki karakteristik dan persyaratan yang berbeda dengan survey Poligon dll


Karakteristik satelit GPS

  • Power Supply :

5 m solar panel

27 AH NiCad Battery

  • Frequency Standard :

Rubidium Cesium Quartz

  • Weight : 845 kg

  • Expected Life : 7.5 years


Segmen GPS

Satelit-satelit GPS (Space Segment)

  • Terdiri dari 24 Satelit BlokII dan BlokIIA ( blok IIR disiapkan )

  • Terdiri dari 6 Bidang Orbit, 4 Satelit per orbit

  • Inklinasi 55 derajat

  • Periode orbit 12 jam

  • Kecepatan orbit 3.87 km/detik

  • Bentuk orbit mendekati lingkaran, dengan a = 26.600 km

  • Jarak antar orbit 60°

  • Merupakan satelit orbital (kecepatan orbit satelit 2 kali lebih cepat dari kecepatan orbit bumi)

  • Ketinggian rata-rata 20200 km

  • Satelit mirip radio pemancar di angkasa

  • One way ranging system

  • Dari wilayah Indonesia dapat diamati 6 - 9 satelit dg elevasi 15 deg

  • Nama satelit ditunjukkan dengan SVN ( Satellite Vehicle Number) dan PRN (Pseudo Random Number )


Pengguna (User Segment)

Mengamati sinyal GPS, menghitung posisi, kecepatan, informasi mengenai waktu


System control (Control Segment)

Sinkronisasi waktu, injeksi data, monitor kesehatan satelit

prediksi orbit. dll






Signal&Data GPS

  • Signal yang dipancarkan oleh satelit berisi informasi : Posisi satelit GPS, Jaraknya dari sipengamat lengkap dengan informasi waktunya, Status kesehatan satelit dan informasi lainnya.

Komponen Signal GPS

  • Penginformasi Jarak (CODE), ada 2 macam code : P-code ( Precise atau private ), C/A code (Coarse Acquisition/Clear access)

  • Penginformasi Posisi Satelit ( Navigation messages) : Prediksi efemeris satelit, Koreksi parameter jam satelit, Informasi status sistem GPS

  • Gelombang Pembawa ( Carrier wave ), ada 2 gelombang pembawa : L1 (1575,42 Mhz dan panjang gelombang = 19.05 cm) dan L2 (1227,60 MHz dan panjang gelombang =24.25 cm).


PENGELOLA GPS

  • Sistem GPS dikembangkan oleh Departemen Pertahanan Amerika Serikat (Defense Mapping Agency) untuk keperluan sipil maupun militer dalam hal penentuan posisi tiga dimensi. Pada awalnya tujuan dari pengembangan GPS adalah untuk menunjang kepentingan militer Amerika Serikat.


SISTEM KOORDINAT

  • Dalam sistem GPS dikenal ada beberapa sistem koordinat

  • Sistem Koordinat Orbit

  • Sistem Koordinat Kartesian

  • Sistem Koordinat Geodetik

  • Sistem Koordinat Toposentrik














Elemen Keppler

  • Setengah sumbu panjang (a)

  • Eksentrisitas (e)

  • Anomali sejati (f)

  • Right ascension of ascending node (W)

  • Argument of perigee (w),

  • Inklinasi (i).








Konfigurasi Orbit

  • Konstelasi standar dari satelit GPS terdiri dari 24 satelit yang menempati 6 bidang orbit yang bentuknya sangat mendekati lingkaran, dengan eksentrisitas orbit umumnya lebih kecil dari 0,02. Keenam orbit satelit GPS mempunyai spasi sudut yang sama antar sesamanya.. Setiap orbit ditempati oleh 4 satelit dengan interval antaranya yang tidak sama. Jarak antar satelit diatur sedemikian rupa untuk memaksimalkan probabilitas kenampakan setidaknya 4 satelit yang bergeometri baik dari setiap tempat di permukaan bumi pada setiap saat.














PENETUAN POSISI DENGAN GPS

  • Posisi yang didapat adalah 3D ( X,Y,Z) atau ( L,B,h)

  • Tinggi yang diberikan adalah tinggi ellipsoid

  • Datum WGS84 dengan ellipsoid GRS 1980

  • Penentuan posisi dapat dengan cara : Absolut positioning, Diffeential, Static, Rapid Static, Re-occupation, Kinematic, Kinematic On the fly

  • Titik yang akan ditentukan dapat diam maupun bergerak

  • Spektrum ketelitian dari : mm hingga puluhan meter.


FAKTOR-FAKTOR YANG MEMPENGARUHI KETELITIAN POSISI GPS

  • Ketelitian Data

Type data yang digunakan, Kualitas Receiver GPS, Level kesalahan/bias.

  • Geometri Satelit

Jumlah Satelit, Lokasi dan distribusi satelit, lama pengamatan.

  • Metoda penentuan posisi

Absolut / defferensial positioning

Static, Rapid Static, Reoccupation, Kinematic, OTF

Satu atau dua referensi.

  • Strategi pemrosesan data

Real Time/post processing, pemrosesan base line & perataan jaring







Konsep penentuan posisi geodetik pengamat (suatu titik) dengan menggunakan data receiver GPS


  • GAMBAR :

ω

Ω

γ

Keterangan gambar :

O : pusat massa bumi (WGS ’84)

SVi : satellite vehicle (kendaraan edar), i = 1, 2, 3, 4

P : posisi pengamat (receiver)

a : setengah sumbu panjang ellipsoid

b : setengah sumbu pendek ellipsoid

f : anomali sejati

Ω : right ascension of ascending node

ω : argument of perigee

Di : jarak dari receiver ke SVi

VE (γ) : vernal equinox

X,Y,Z (+) : sumbu kartesi referensi WGS ‘84

X,Y,Z (P) : koordinat kartesi receiver

X,Y,Z (SVi) : koordinat kartesi SVi



  • KONSEP :

Prinsip penentuan posisi dengan GPS adalah reseksi (pengikatan ke belakang) dengan jarak. Penentuan posisi dilaksanakan dengan melakukan pengamatan simultan ke minimal 4 satelit yang koordinatnya diketahui. Pengamatan simultan ke 4 satelit dibutuhkan untuk mendapatkan solusi 3 parameter posisi dan satu parameter koreksi waktu.

Penentuan posisi pada suatu titik disebut absolute positioning. Posisi titik tersebut direferensikan terhadap pusat sistem koordinat, yaitu geocenter GPS (pusat massa bumi). Data yang digunakan adalah pseudorange (jarak semu).

  • URUTAN PERHITUNGAN :

    1. Mencari Rumus Persamaan Jarak

  • Rumus umum untuk menghitung jarak dengan waktu adalah :

D = c.t , di mana : (1)

D : jarak (meter)

c : tetapan kecepatan cahaya (3 x 108 meter/detik)

t : waktu (detik)

  • Rumus menghitung jarak dengan beda waktu adalah :

D = c.∆t atau D = c.(t1 – t2) (2)

  • Rumus menghitung jarak dengan koordinat adalah :

D = √ (X1 – X2)2 + (Y1 – Y2)2 + (Z1 – Z2)2 (3)

  • Rumus perhitungan jarak pengamat dan satelit dengan waktu adalah (i = 1 s/d 4) :

DPSVi(t) = √ {[XSVi(t) – XP]2 + [YSVi(t) – YP]2 + [ZSVi(t) – ZP]2} - c.∆t (4)


  1. Menghitung Koordinat Satelit (Kartesi 3 D) dengan Data Broardcast Ephemeris

    • Konstanta :

      1. Konstanta gravitasi universal bumi : μ = 3986001.5 x 108 m3/det

      2. Kecepatan rata-rate rotasi bumi : Ω = 7.292115147 x 10-5 rad/sec

    • Perhitungan anomali sejati :

      1. Waktu sesudah epoch referensi : tk = t - toe (5)

      2. Rata-rata gerakan terkoreksi : n = √(μ/a3) + ∆n (6)

      3. Rata-rata anomali pada tk : Mk = M0 + n.tk (7)

      4. Penyelesaian iteratif untuk Ek : Mk = Ek – e sin Ek (8)

      5. Anomali sejati vk : vk = arc tg {√(1 – e2sin Ek)/cos Ek – e)} (9)

    • Argumen lintang :

      1. Argumen lintang : Φk = vk + ω (10)

      2. Koreksi : δuk = Cus sin 2Φk + Cus cos 2Φk (11)

      3. Argumen lintang terkoreksi : uk = Φk + δuk (12)

    • Radius orbit terkoreksi :

      1. Radius : rk = a(1-e.cos Ek) + Crs.sin 2Φk + Cic cos 2Φk (13)

      2. Posisi di orbit : Xk = rk cos uk (14)

Yk = rk sin uk

  • Inklinasi terkoreksi : ik = i0 + Cis.sin 2Φk + Cic cos 2Φk + i tk (15)

  • Ascending node terkoreksi : Ωk = Ω0 + (Ω – Ωe).tk – Ωe.toe (16)

    • Koordinat WGS ’84 : Xe = Xk.cos Ωk – Yk.sin Ωk (17)

Ye = Xk.cos Ωk – Yk.sin Ωk (18)

Ze = Yk.sin Ωk (19)

Di mana :

n : perbedaan dari anomali menengah = 4.389112813.10-9 rad/det

e : eksentrisitas = 2.8019920.10-3

ω = 2.420534936 rad

toe : time of ephemeris, epoch referensi dari efemeris

a : sumbu

M0 : anomali rata-rata pada waktu referensi

i : kecepatan perubahan dari inklinasi

Ω : kecepatan perubahan dari right ascension

Cuc,Cs : koefisien koreksi argument of perigee

Crc ,Crs : koefisien koreksi jarak geosentrik

Cic ,Cis : koefisien koreksi inklinasi



  1. Memasukkan Nilai Jarak dan Nilai Kartesi Satelit

DPSVi(t) = √ {[XSVi(t) – XP]2 + [YSVi(t) – YP]2 + [ZSVi(t) – ZP]2} (20)


Karena (XP,YP,ZP) tidak linear, maka diberikan nilai pendekatan (XP0,YP0,ZP0) agar DPSVi(t) dapat dihitung, sehingga rumusnya menjadi :

DPSVi(t) = √ {[XSVi(t) – XP0]2 + [YSVi(t) – YP0]2 + [ZSVi(t) – ZP0]2} (21)


Nilai (XP,YP,ZP) dihitung dengan :

XP = XP0 + ∆XP (22)

YP = YP0 + ∆YP

ZP = ZP0 + ∆ZP


Rumus jarak (20) dilakukan linearisasi menggunakan Deret Taylor :

DPSVi(t) = f (XP0+∆XP , YP0+∆YP , ZP0+∆ZP) (23)

DPSVi(t) = f (XP0,YP0,ZP0) + ∂f(XP0,YP0,ZP0)/∂XP0 . ∆XP + ∂f(XP0,YP0,ZP0)/∂YP0 . ∆YP + ∂f(XP0,YP0,ZP0)/∂ZP0 . ∆ZP (24)

Di mana :

f(XP0,YP0,ZP0)/∂XP0 = - XVSi(t) – XP0 / DP0SVi (25)

f(XP0,YP0,ZP0)/∂XP0 = - YVSi(t) – YP0 / DP0SVi

f(XP0,YP0,ZP0)/∂XP0 = - ZVSi(t) – ZP0 / DP0SVi



  1. Melakukan Hitung Perataan

    • Vektor matriks :

L + V = A X atau

V = A X – L di mana :


DPSV1 - DPSV1

L = DPSV2 - DPSV2 adalah matriks pengamatan

dst - dst

DPSVn - DPSVn



V DPSV1

V = V DPSV2 adalah koreksi pengamatan

dst

V DPSVn


(XP-XP0SV1)/DPSV1 (YP-YP0SV1)/DPSV1 (ZP-ZP0SV1)/DPSV1 adalah

A = (XP-XP0SV2)/DPSV2 (YP-YP0SV2)/DPSV2 (ZP-ZP0SV2)/DPSV2 matriks

dst dst dst koefisien

(XP-XP0SVn)/DPSVn (YP-YP0SVn)/DPSVn (ZP-ZP0SVn)/DPSVn parameter


    • Membentuk matriks X dengan rumus :

X = ( AT PA )-1 AT PL dengan matriks bobot :


Γ02x2 simetris 1 Φ

P = Γ02Y2 jika (Γ02x2 , Γ02Y2 , Γ02Z2 ) diberi bobot 1 1

simetris Γ02Z2 Φ 1


sehingga :


∆XP

X = ∆YP

∆ZP



    • Iterasi (XP,YP,ZP) dengan (XP0,YP0,ZP0) untuk menghitung jarak

XP = XP0 + ∆XP

YP = YP0 + ∆YP

ZP = ZP0 + ∆ZP


    • Iterasi dihentikan jika :

XPn - XPn-1 ≤ toleransi

YPn - YPn-1 ≤ toleransi

ZPn - ZPn-1 ≤ toleransi


  1. Melakukan Transformasi Koordinat Kartesi 3 D menjadi Koordinat Geodetik

XP = (N+h) cos φP cos λP

YP = (N+h) cos φP sin λP

ZP = [N (1-e2) + h] sin φP


Dengan P = (N+h) cos φP,

φP0 = arc tg { (ZP/P) x [1-(e2.N)/(N+h)]-1 }

dilakukan proses iterasi dengan pendekatan h0 sehingga diperoleh :

P (φnn,hn)

Proses iterasi dihentikan jika :

φPn - φPn-1 ≤ toleransi

λPn - λPn-1 ≤ toleransi

hPn - hPn-1 ≤ toleransi, sehingga diperoleh : P (φPP,hP)



  1. KETELITIAN POSISI GPS

Ketelitian posisi titik hasil pengamatan GPS secara umum tergantung pada:

    1. Ketelitian data

      • tipe data yang digunakan

      • kualitas reciever yang digunakan

      • level dari kesalahan dan bias

    2. Geometri satelit

      • Jumlah satelit

      • Lokasi dan distribusi satelit

      • Lama pengamatan

    3. Metode penentuan posisi

    4. Strategi pemrosesan data

      • Real time atau post processing

      • Strategi eliminasi dan pengoreksian kesalahan/bias

      • Pemrosesan baselin perataan jaringan

      • Kontrol kualitas.


  1. TAHAPAN PENGUKURAN

    1. Pendefinisian Survei

      • Penetapan personel lapangan

      • Pengumpulan dokumen awal

      • Penyiapan spesifikasi teknis dan jadwal implementasi survai

    2. Perencanaan dan persiapan

      • Pengumpulan informasi perencanaan

      • Perencanaan awal

      • Reconnaisance

      • Pendesainan geometri jaringan

      • Finalisasi dokumen perencanaan

      • Tinjauan desain rencana survai

    3. Pengamatan satelit GPS

      • Tahap persiapan

      • Tahap pengamatan

      • Tahap setelah pengukuran

    4. Pengolahan data GPS

      • Pengolahan data baseline

      • Perataan jaringan

      • Transformasi datum dan ordinat

    5. Pendokumentasian hasil survei

APLIKASI GPS

  1. Penentuan titik dasar teknik (titik ikat)

  2. pengukuran dan pemetaan







Why GPS

  1. GPS dapat digunakan tanpa tergantung waktu dan cuaca, sehingga meningkatkan efisiensi dan fleksibilitas pengukuran.

  2. ketinggian orbit satelit cukup tinggi (20:200km) menghasilkan cakupan liputan yang sangat luas, ditambah jumlah satelit yang (24) dapat dilihat dari bagian manapun dimuka bumi.

  3. tidak terpengaruh kondisi topografi, tidak memerlukan keterlihatan antar titik sebagaimana pengukuran teristis konvensional.

  4. posisi hasil pengukuran GPS mengacu pada datum global sangat bermanfaat untuk menyamaan sistem, terutama untuk Indonesis yang terdiri dari banyak pulau.

  5. ketelitian nposisi GPS mempunyai spektrum yang sangat luas menghasilkan fleksibilitas pemilihan alternatif pengukuran sesuai dengan sumber daya yang dimiliki.

  6. pemakaian sistem GPS tidak dikenakan biaya kecuali pembelian alat.













  1. METODE PENENTUAN POSISI ABSOLUT

Absolute positioning adalah metode penetuan posisi menggunakan satu receiver GPS di suatu stasiun pengamatan untuk mengumpulkan data dari beberapa satelit GPS guna menentukan posisi dari stasiun tersebut.


METODE PENENTUAN POSISI RELATIF (DEFERENSIAL).

Pada penetuan posisi relatif (diferensial), posisi suatu titik ditentukan relatif terhadap titik lainnya yang telah diketahui koordinatnya.

Keterangan gambar:

S1, S2, S3, S4: Satelit GPS

A, B : titik (Stasiun) pengamat

P21, p22 : jarak dari satelit S2 ke pengamat A dan B

bAB : jarak basis antara titik A dan B

pada gambar 6, titik A merupakan titik referensi yang telah diketahui posisinya dalam sistem koordinat tertentu, sedangkan titik B belum diketahui posisinya. Pengamatan dilakukan secara bersamaan, sehingga beberapa jenis bias dan kesalahan dapat dieliminasi atau direduksi.


METODE STATIK

Penentuan posisi secara statik (Static Positioning) adalah penentuan posisi dari titik-titik yang statik (diam). Penetuan posisi ini dapat dilakukan secara absolut maupun diferensial, dengan menggunakan data kode dan atau fase. Dapat mengahasilkan ketelitian posisi yang tinggi hingga orde milimeter. Waktu yang dibutuhkan delam pengukuran berkisar antara 45 menit hingga beberapa jam.


METODE STATIK SINGKAT

Penetuan posisi scera statik singkat (Fast/ rapid static) pada dasarnya adalah identik dengan metode statik hanya dengan waktu yang lebih singkat (5-20 menit). Dapat menghasilkan ketelitian posisi yang tinggi orde centimeter.



METODE PSEUDO KINEMATIK

Metode pseudo kinematik (intermittent/reocupation) pada dasarnya adalah pelaksanaan dua metode pengukuran statik singkat dengan selang satu sampai beberapa jam diantaranya.


METODE STOP AND GO

Metode stop and go (semi kinematik) adalah metode penetuan posisi titik dengan posisi titik statik sedangkan reciever bergerak dari titik dan diam beberapa saat (1-2 menit) di titik tersebut. Metode ini berbasiskan pada penetuan posisi secara diferensial dengan menggunakan data fase. Agar ambiguitas fase dapat dipecahkan, pada titik pertama yang diukur harus dilakukan pengamatan yang relatif lebih lama (inisialisasi). Pada saat pengukuran, selama pergerakan reciever sinyal satelit tidak boleh terputus (cycle slips). Jika hal tersebut terjadi, harus kemali dilakukan inisialisasi.


METODE KINEMATIK

Penentuan posisi secara kinematik (kinematik positioning) adalah penetuan p[osisi dari titik-titik yang bergerak sehingga receiver tidak dapat berhenti pada titik-titik tersebut. Sebagaimana halnay metode statik, penetuan posisi ini dapat dilakukan secara absolut maupun deferensial, dengan menggunakan data kode dan atau fase. Dapat menghasilkan ketelitian posisi yang beragam, dari tingkat rendah hingga relatif tinggi.