File:food-crop-production1.png - Revision history

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

2024-03-05T20:51:27Z

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

← Older revision		Revision as of 16:51, 5 March 2024
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	# scale everything to 2160x1080		# scale everything to 2160x1080
	pop @@ ~~_width~~/4		pop @@ $width/4
	pop @@ ~~_height~~/4		pop @@ $height/4
	crop @@ width/2		crop @@ width/2
	crop @@ height/2		crop @@ height/2

Conversion script: Conversion script moved page File:Food-crop-production1.png to File:food-crop-production1.png: Converting page titles to lowercase

2022-08-26T19:47:26Z

Conversion script moved page File:Food-crop-production1.png to File:food-crop-production1.png: Converting page titles to lowercase

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

Elie: /* Methodology */

2022-08-26T19:06:57Z

Methodology

← Older revision		Revision as of 15:06, 26 August 2022
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	* [[:File:cropland.data-float32-4320x2160]]		* [[:File:cropland.data-float32-4320x2160]]
	* [[:File:countries.data-int16-8640x4320]]		* [[:File:countries.data-int16-8640x4320]]
	* [[:File:yields~~-if-crop-choices~~.data-float64-895x1]]		* [[:File:yields.data-float64-895x1]]

Elie: /* Methodology */

2022-08-26T19:04:10Z

Methodology

← Older revision		Revision as of 15:04, 26 August 2022
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	==Methodology==		==Methodology==
			Made from data:
			* [[:File:population.data-float64-8640x4320]]
			* [[:File:cropland.data-float32-4320x2160]]
			* [[:File:countries.data-int16-8640x4320]]
			* [[:File:yields-if-crop-choices.data-float64-895x1]]


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

Elie: Elie uploaded a new version of File:Food-crop-production1.png

2022-08-14T17:06:50Z

Elie uploaded a new version of File:Food-crop-production1.png

← Older revision	Revision as of 13:06, 14 August 2022
(No difference)

Elie: /* Summary */

2022-08-13T16:20:54Z

Summary

← Older revision		Revision as of 12:20, 13 August 2022
Line 3:		Line 3:

	Isochromic world map (projection: equirectangular/geographic)		Isochromic world map (projection: equirectangular/geographic)

			==Methodology==

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

			# load files
			pop << data/population.data-float64-8640x4320 # population counts
			crop << data/cropland.data-float32-4320x2160 # cropland fraction of land
			yield << data/countries.data-int16-8640x4320 # country codes
			yields << data/yields.data-float64-895x1 # crop yields (average kalories/day/acre) by country code
			yield [] yields # now 'yield' is a map of crop yields
			borders << data/borders-black-on-white.png

			# fill in blanks (default values)
			crop _= 0
			crop >= 0
			yield _= 12546.6943934817 # from food1.sql: SELECT SUM(production_kalories_per_day)/SUM(farmland_acres) FROM main WHERE region_name="World";

			# scale everything to 2160x1080
			pop @@ _width/4
			pop @@ _height/4
			crop @@ width/2
			crop @@ height/2
			yield @@ width/4
			yield @@ height/4
			borders @@ width/4
			borders @@ height/4

			# make the borders a bit fainter
			borders -= 1
			borders *= 0.4
			borders += 1

			# calculate food production
			crop @@ density_to_quantity # now 'crop' is crop land in km^2
			crop *= 247.10538 # now 'crop' is crop land in acres
			crop *= yield # now 'crop' is crop production in kalories/day

			# generate output...

			out.r := pop
			out.r /= 500000 # max people per pixel
			out.r @@ spread
			out.r @@ negative

			out.b := crop
			out.b /= 1250000000 # max kalories/day per pixel
			out.b @@ spread
			out.b @@ negative

			out.g := out.r
			out.g *= 3
			out.g += out.b
			out.g /= 4

			out.r *= borders
			out.g *= borders
			out.b *= borders

			out >> data/food-crop-production1.png



			Legend (html):
			<syntaxhighlight lang="html">
			<table style="font-family:sans-serif"><tr style="line-height:2em"><td>
			<span style="background-color:#003FFF; border:1px solid">&emsp;</span>
			</td><td>
			Population
			</td><td>
			Total: 7.9 billion
			</td></tr><tr><td>
			<span style="background-color:#FFC000; border:1px solid">&emsp;</span>
			</td><td>
			Food crop production primary&emsp;
			</td><td>
			Total: 43.1 trillion kalories/day
			</td></tr></table>
			<p><small>https://<b>olam.wiki/Food</b></small></p>
			</syntaxhighlight>

Elie: Production of food crops, superimposed on population. Isochromic world map (projection: equirectangular/geographic)

2022-08-13T16:18:15Z

Production of food crops, superimposed on population. Isochromic world map (projection: equirectangular/geographic)

New page

== Summary ==
Production of food crops, superimposed on population.

Isochromic world map (projection: equirectangular/geographic)