How big is 47,000 dunams?

The Great Barrier Reef, the largest such reef in the world, covers about 348,000,000 dunams. Reefs, such as the Great Barrier, grow in diameter at a rate of 1 to 3 cm per year.

Housing the presidency, the White House occupies six stories and a total of 6.20 dunams of floor space. This space includes 132 rooms, 35 bathrooms, 28 fireplaces, and 3 elevators, as well as a tennis court, bowling alley, movie theater, jogging track, swimming pool, and putting green.

The "Treasure State," Montana measures 380,838,070 dunams in total area. The northwest corner of Montana is home to Flathead Lake, the largest freshwater lake in the continental United States with a surface area of 496,000 dunams.

Per NFL rules, a football field should measure 109.728 m (120 yards) long by 48.768 m wide, for a total area of 5.3512151040 dunams. Due to a blizzard, the first NFL playoff game in 1932 was held indoors in Chicago Stadium (it was also the first indoor game) on a field measuring just 55 m by 40.0 m, for a total area of 2.20 dunams.

The "Golden State," California measures 423,969,580 dunams in total area. California is home to both the highest point — Mt. Whitney at 4,421 m (14,505 ft) — and lowest point — Death Valley at 85.5 m (282 ft) below sea level — in the continental United States, the two of which are separated by just 123 km (76 mi).

One of the largest homes in the world, Bill and Melinda Gates' home has a total area of 4.4740 dunams, including 7 bedrooms, 24 bathrooms, 6 kitchens, 6 fireplaces, a 0.230 dunams gym, a 0.09 dunams dining room, and a 0.190 dunams library. It was designed by Bohlin Cywinski Jackson, the same architectural firm responsible for the design of one of Apple Inc's flagship stores on Fifth Avenue in New York City.

The "Lone Star State," Texas measures 695,621,130 dunams in total area. Texas covers so much area that Texarkana — a city in the state's northeastern corner — is about 30 km closer to Chicago, Illinois, than it is to El Paso — in the western corner of Texas.

Per National Hockey League Official Rules, a hockey rink should measure 60.96 m long by 25.908 m wide with a corner arc radius of 8.5344 m, for a total area of about 1.516828740 dunams. Ice hockey is believed to have developed from field hockey after players began holding games on ice rinks, which had been traditionally used for the sport of curling.

The "Last Frontier," Alaska measures 1,717,854,300 dunams in total area. Alaska is home to over 100,000 glaciers — half of the world's total — including the Bering Glacier complex near the southeastern border of Alaska, which covers 5,830,000 dunams.

Manchester Cathedral includes a total interior area of 1.2380 dunams between the Nave, Chapel, Library, Chapter House, and Rectory. The height of the Cathedral's bell tower is 41.1 m.

The United States Bullion Depository, commonly referred to by the metonym "Fort Knox" (in spite of the fact that the Depository is not located on the Fort proper), measures 32.0 m (105 ft) by 36.9 m (121 ft), for a total area of about 1.180 dunams. The Depository is most famous for housing the largest portion of the national gold reserve, but has also temporarily housed the original US Declaration of Independence, an original copy of the US Constitution, and other important documents, kept there for safe keeping during World War II.

Per NBA rules , a basketball court should measure 29.5656 m long by 16.764 m wide, for a total area of 0.49563771840 dunams. The first basketball game, held in a Springfield Massachusetts YMCA, was played on a court half the size of today's NBA standard and ended with a score of 1-0.

An IMAX movie theater screen measures 22 m (72 ft) by 16 m (52 ft) for a total area of 0.35420 dunams. Because the film used in an IMAX movie is more than eight times larger than regular film, the platters of a two-and-a-half hour feature film can weigh up to 250 kg (550 lbs).

Per International Tennis Federation Rules of Tennis 2009, a doubles tennis court should measure 23.7744 m long by 10.9728 m, for a total area of about 0.260760 dunams. Courts may be surfaced with crushed red stone, shale, brick, hard-soil grass, or asphalt.

Brazil measures 8,514,877,000 dunams in total area. Brazil is the world's fifth-largest country by area and eighth-largest economy (by GDP).