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1:100,000 maps are divided into squares representing 1 km 2, each square on the map being one square centimetre in area and representing 1 km 2 on the surface of the Earth. For 1:50,000 maps, the grid lines are 2 cm apart. Each square on the map is 2 cm by 2 cm (4 cm 2) and represents 1 km 2 on the surface of the Earth.
In 2019, 39 million km 2 (15 million sq mi) of Earth's land surface consisted of forest and woodlands, 12 million km 2 (4.6 million sq mi) was shrub and grassland, 40 million km 2 (15 million sq mi) were used for animal feed production and grazing, and 11 million km 2 (4.2 million sq mi) were cultivated as croplands. [271]
The acre is related to the square mile, with 640 acres making up one square mile. One mile is 5280 feet (1760 yards). In western Canada and the western United States, divisions of land area were typically based on the square mile, and fractions thereof. If the square mile is divided into quarters, each quarter has a side length of 1 ⁄ 2 mile ...
Dymaxion map of the world with the 30 largest countries and territories by area. This is a list of the world's countries and their dependencies, ranked by total area, including land and water.
A third of Earth's land surface is used for agriculture, [152] [153]: 126 with estimated 16.7 million km 2 (6.4 million sq mi) of cropland and 33.5 million km 2 (12.9 million sq mi) of pastureland. [88] This has had significant impacts on Earth's ecosystems.
The hectare (/ ˈ h ɛ k t ɛər,-t ɑːr /; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm 2), that is, 10,000 square metres (10,000 m 2), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectares and one hectare contains about ...
An area of one square kilometre consists of 100 hectares each containing 10,000 square metres. This page is a progressive and labelled list of the SI area orders of magnitude, with certain examples appended to some list objects.
Approximately half of Canada is covered by forest, totaling around 2.4 million km 2 (0.93 million sq mi). [59] The boreal forest of Canada is considered to be the largest intact forest on Earth, with around 300,000 square kilometres (120,000 sq mi) undisturbed by roads, cities or industry. [60]