22 lines
475 B
JavaScript
22 lines
475 B
JavaScript
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import {atan, cos, tan} from "./math";
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import parallel1 from "./parallel1";
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export function cylindricalStereographicRaw(phi0) {
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var cosPhi0 = cos(phi0);
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function forward(lambda, phi) {
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return [lambda * cosPhi0, (1 + cosPhi0) * tan(phi / 2)];
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}
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forward.invert = function(x, y) {
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return [x / cosPhi0, atan(y / (1 + cosPhi0)) * 2];
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};
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return forward;
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}
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export default function() {
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return parallel1(cylindricalStereographicRaw)
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.scale(124.75);
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}
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