File:land-builtup1.png
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Original file (1,600 × 800 pixels, file size: 205 KB, MIME type: image/png)
Summary
Map of Earth with all built-up land shown in black.
Made from File:population.data-float64-8640x4320 and File:blue-marble-posterized.png.
Image generator code:
pop << data/population.data-float64-8640x4320 # population counts earth << data/blue-marble-posterized.png # base layer pop @@ quantity_to_density # converts population counts to density (people per km^2) pop /= 2500 # threshold (people per km^2) for land to be considered "fully built-up" pop <= 1 pop :: earth.r # resize to fit base layer earth.r -= pop earth.g -= pop earth.b -= pop earth.r @@ 01 earth.g @@ 01 earth.b @@ 01 earth >> data/land-builtup1.png
Note: we are using population density as a best guess for determining which land is built-up. In theory that might not be perfectly accurate, but in practice, the end result is matches well enough with totals from other data sources.
See also
- File:land-crop1.png - crop land
- File:land-pasture1.png - pasture
- File:land-usage1.png - all land usage
- File:land-wild1.png - untouched lands
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 09:15, 30 August 2022 | 1,600 × 800 (205 KB) | Elie (talk | contribs) |
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File usage
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