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Conic Equidistant Projection

eqco

A map projection with transformation equations

x=rhosintheta
(1)
y=rho_0-rhocostheta,
(2)

where

rho=(G-phi)
(3)
theta=n(lambda-lambda_0)
(4)
rho_0=(G-phi_0)
(5)
G=(cosphi_1)/n+phi_1
(6)
n=(cosphi_1-cosphi_2)/(phi_2-phi_1).
(7)

The inverse formulas are given by

phi=G-rho
(8)
lambda=lambda_0+theta/n,
(9)

where

rho=sgn(n)sqrt(x^2+(rho_0-y)^2)
(10)
theta=tan^(-1)(x/(rho_0-y)).
(11)

See also

Equidistant Projection

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Cite this as:

Weisstein, Eric W. "Conic Equidistant Projection." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ConicEquidistantProjection.html

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