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20 lines
485 B
20 lines
485 B
4 months ago
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import {geoProjection as projection} from "d3-geo";
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import {atan, cos, radians, sqrt, tan} from "./math.js";
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var faheyK = cos(35 * radians);
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export function faheyRaw(lambda, phi) {
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var t = tan(phi / 2);
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return [lambda * faheyK * sqrt(1 - t * t), (1 + faheyK) * t];
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}
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faheyRaw.invert = function(x, y) {
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var t = y / (1 + faheyK);
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return [x && x / (faheyK * sqrt(1 - t * t)), 2 * atan(t)];
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};
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export default function() {
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return projection(faheyRaw)
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.scale(137.152);
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}
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