(Q56192172)

English

equal Earth projection

pseudocylindrical, equal-area map projection

equal Earth map projection

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map projection

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invention

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discoverer or inventor

Tom Patterson

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Bernhard Jenny

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Bojan Šavrič

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time of discovery or invention

2018

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defining formula

{\begin{aligned}x&={\frac {2{\sqrt {3}}}{3}}{\frac {\lambda \cos \theta }{a_{1}+3a_{2}\theta ^{2}+\theta ^{6}(7a_{3}+9a_{4}\theta ^{2})}}\\y&=\theta (a_{1}+a_{2}\theta ^{2}+\theta ^{6}(a_{3}+a_{4}\theta ^{2}))\end{aligned}}

defining formula

{\begin{aligned}\theta &=\arcsin \left({\frac {\sqrt {3}}{2}}\sin {\varphi }\right)\\a_{1}&=1.340264\\a_{2}&=-0.081106\\a_{3}&=0.000893\\a_{4}&=0.003796\end{aligned}}

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official website

http://equal-earth.com

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described at URL

http://shadedrelief.com/ee_proj/

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described by source

The Equal Earth map projection

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maintained by WikiProject

WikiProject Mathematics

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Identifiers

Google Knowledge Graph ID

/g/11gm87c6yk

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(Q56192172)

equal Earth projection

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