File:pasture.data-float32-4320x2160: Difference between revisions

File:pasture.data-float32-4320x2160 (view source)

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 ==Summary==
-Map of Earth with all pasture land shown in black.
+Raw headerless data: World map of pasture land.
+Grid of numbers, each ranging from 0 to 1, to indicate "what fraction of this area is pasture land"
+Map projection: equirectangular (geographic).
+Converted from "Pasture2000_5m.tif" (file in [[:File:CroplandPastureArea2000_Geotiff.zip]]): raw data extracted using [http://libtiff.org/tools tifftools].
+Ocean areas contain negative numbers to indicate "non-applicable". When using this data to [[Code:isochromic.c|generate images]], you'll probably want to replace the negatives with zeroes, using a command such as <code>pasture >= 0</code>.
+Data source:
+: Ramankutty, N., A.T. Evan, C. Monfreda, and J.A. Foley (2008), Farming the planet: 1. Geographic distribution of global agricultural lands in the year 2000. Global Biogeochemical Cycles 22, GB1003, doi:10.1029/2007GB002952.
+Note: This dataset is from the year 2000. By now, there is probably a few percent more farmland and [[habitat loss]] - but at least this dataset still provides a general sense of how land is on Earth. If you know of a newer dataset, please let me know in the [[{{TALKPAGENAME}}|talk page]].
 ==Zipped download==