File:population-earth1.png - Revision history

Elie: Updated the "preserve sums" syntax (it's '$' now, not '_')

2024-03-05T21:05:11Z

Updated the "preserve sums" syntax (it's '$' now, not '_')

← Older revision		Revision as of 17:05, 5 March 2024
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	# resize things to fit the 'earth' background		# resize things to fit the 'earth' background
	pop :: ~~_earth~~.r # the '_' preserves the total population		pop :: $earth.r # the '$' preserves the total population
	borders :: earth.r		borders :: earth.r
	borders *= 6 # brighten the lines		borders *= 6 # brighten the lines

Elie: /* Summary */

2024-02-25T13:23:41Z

Summary

← Older revision		Revision as of 09:23, 25 February 2024
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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: 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.		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.
			TODO: probably just gonna use [[File:continents-black-on-white.png]] instead of [[File:blue-marble-posterized.png]]. Not as aesthetic but still nice enough, and not as prone to misinterperetation. Maybe call it [[File:population-earth2.png]]? or even just [[File:population.png]]?
	-->		-->

Elie: /* Summary */

2024-02-25T13:17:14Z

Summary

← Older revision		Revision as of 09:17, 25 February 2024
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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.
			<!--
			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.
			-->

	==Methodology==		==Methodology==

Conversion script: Conversion script moved page File:Population-earth1.png to File:population-earth1.png: Converting page titles to lowercase

2022-08-26T19:47:25Z

Conversion script moved page File:Population-earth1.png to File:population-earth1.png: Converting page titles to lowercase

← Older revision	Revision as of 15:47, 26 August 2022
(No difference)

Elie: /* Summary */

2022-08-07T07:55:11Z

Summary

← Older revision		Revision as of 03:55, 7 August 2022
Line 5:		Line 5:

	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).

			==Methodology==

			[[Code:isochromic.c\|Image generator]] code:

			# load files
			pop << data/[[:File:population.data-float64-8640x4320\|population.data-float64-8640x4320]]
			earth << data/[[:File:blue-marble-posterized.png\|blue-marble-posterized.png]]
			borders << data/[[:File:borders-black-on-white.png\|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

Elie: 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).

2022-08-07T07:52:28Z

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).

New page

== Summary ==
An [[Term:isochromic|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).