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

Latest revision as of 19:42, 30 August 2022

Summary

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 tifftools.

Ocean areas contain negative numbers to indicate "non-applicable". When using this data to generate images, you'll probably want to replace the negatives with zeroes, using a command such as pasture >= 0.

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 talk page.

Zipped download

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The file is 4 MB when zipped, and 36 MB when unzipped.

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	Date/Time	Dimensions	User	Comment
current	19:19, 30 August 2022	(4.09 MB)	Elie (talk \| contribs)

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@@ Line 1: / Line 1: @@
 ==Summary==
-Map of Earth with all pasture land shown in black.
+Raw [[headerless data]]: World map of pasture land.
-==Methodology==
+Grid of numbers, each ranging from 0 to 1, to indicate "what fraction of this area is pasture land"
-Made from [[:File:pasture.data-float32-4320x2160]] and [[:File:blue-marble-posterized.png]].
+Map projection: equirectangular (geographic).
-[[Code:isochromic.c|Image generator]] code:
- pasture<< data/pasture.data-float32-4320x2160  # pasture density
- earth  << data/blue-marble-posterized.png      # base layer
- pasture >= 0       # remove junk data
+Converted from "Pasture2000_5m.tif" (file in [[:File:CroplandPastureArea2000_Geotiff.zip]]): raw data extracted using [http://libtiff.org/tools tifftools].
- pasture :: earth.r # resize to fit base layer
- earth.r -= pasture
+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>.
- earth.g -= pasture
- earth.b -= pasture
- earth.r @@ 01
+Data source:
- earth.g @@ 01
+: 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.
- earth.b @@ 01
- earth >> data/land-crop1.png
+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==
@@ Line 26: / Line 22: @@
 The file is 4 MB when zipped, and 36 MB when unzipped.
+==See also==
+* [[:File:cropland.data-float32-4320x2160]]