File:Equirectangular-projection+terminator.jpg

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Original file(2,048 × 1,025 pixels, file size: 817 KB, MIME type: image/jpeg)

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Description
English: Earth Equirectangular-projection + terminator (around 6 pm UTC near the december solstice)
Français : Terminateur sur une projection cylindrique équidistante de la Terre aux environs de 18h UTC vers le solstice de décembre
Date
Source Own work derivated from File:Equirectangular-projection.jpg
Author Xofc (derivated from a work by user:Mdf who used a NASA image)

The terminator has been ploted with gnuplot

set angles degrees
set yrange [-90:90]
set xrange [-180:180]
set terminal png enhanced size 2048,1024
set output 'core.png'
f(x)=atan(tan(90-23.4)*cos(x+90))
plot f(x)

resized, and used as selection calc for luminosity+contrast enhancement with GIMP. (See fr:WP:Oracle/semaine en cours#Géométrie)

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I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

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Date/TimeThumbnailDimensionsUserComment
current09:24, 21 December 2011Thumbnail for version as of 09:24, 21 December 20112,048 × 1,025 (817 KB)Xofc (talk | contribs){{Information |Description ={{en|1=Earth Equirectangular-projection + terminator (around 6 pm UTC near the december solstice)}} {{fr|1=Terminateur sur une projection cylindrique équidistante de la Terre aux environs de 18h UTC vers le solstice de déc

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