File:population-earth1.png: Difference between revisions
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Everything in black is population. | Everything in black is population. | ||
Note: Some border lines may be completely obscured by populations (especially India's borders with Bangladesh, Pakistan, and Bhutan). Still better than the opposite (letting the border lines obscure the populations). | '''Note:''' Some border lines may be completely obscured by populations (especially India's borders with Bangladesh, Pakistan, and Bhutan). Still better than the opposite (letting the border lines obscure the populations). | ||
'''Note:''' Be careful not to confuse small blue dots (lakes) for small black dots (population). In the next version I'll try to make the blue parts lighter (or erase small bodies of water) so this doesn't happen. | |||
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TODO: try making another [[:File:blue-marble-posterized.png]] where i blur it before posterizing, so small lakes don't appear at all. be sure to check that most of the coastlines would still align with [[:File:borders-black-on-white.png]]. we'll see how it turns out | |||
TODO: also try just changing the image generator code to lighten the blue parts (<code>r *= 1.1</code> and <code>g *= 1.1</code> perhaps - and if forests and deserts look less distinguishable from each other, so be it). Note this might still not be good enough as some image downscaling algorithms aren't gamma-corrected, so dark-ish edges between blue and (green or yellow) may still be enough to look like population. we'll see. | |||
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==Methodology== | ==Methodology== | ||
Revision as of 09:17, 25 February 2024
Summary
An isochromic map of the world population, superimposed on a pastel-color background that shows land, water, and borders.
Everything in black is population.
Note: Some border lines may be completely obscured by populations (especially India's borders with Bangladesh, Pakistan, and Bhutan). Still better than the opposite (letting the border lines obscure the populations).
Note: Be careful not to confuse small blue dots (lakes) for small black dots (population). In the next version I'll try to make the blue parts lighter (or erase small bodies of water) so this doesn't happen.
Methodology
Image generator code:
# load files pop << data/population.data-float64-8640x4320 earth << data/blue-marble-posterized.png borders << data/borders-black-on-white.png borders @@ negative # resize things to fit the 'earth' background pop :: _earth.r # the '_' preserves the total population borders :: earth.r borders *= 6 # brighten the lines # lighten the background earth.r += 0.6 earth.g += 0.6 earth.b += 0.6 # show the borders in white earth.r >= borders earth.g >= borders earth.b >= borders # show the population in black pop /= 800000 # max people per pixel pop @@ spread pop @@ negative earth.r <= pop earth.g <= pop earth.b <= pop # save earth >> data/population-earth1.png
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:52, 7 August 2022 |  | 1,600 × 800 (371 KB) | Elie (talk | contribs) | An Term:isochromic map of the world population, superimposed on a pastel-color background that shows land, water, and borders. Everything in black is population. Note: Some border lines may be completely obscured by populations (especially India's borders with Bangladesh, Pakistan, and Bhutan). Still better than the opposite (letting the border lines obscure the populations). |
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File usage
The following 2 pages use this file:
- Wind power/Geography
- File:Population-earth1.png (file redirect)
