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Antonio Espiritu
2025-04-17 00:35:33 -06:00
parent 4977462629
commit 67fc72aed5
1333 changed files with 1077639 additions and 0 deletions
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static/lib/Highcharts-10.2.1/es-modules/Maps/Projections/EqualEarth.js Normal file
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/* *
*
* Equal Earth projection, an equal-area projection designed to minimize
* distortion and remain pleasing to the eye.
*
* Invented by Bojan Šavrič, Bernhard Jenny, and Tom Patterson in 2018. It is
* inspired by the widely used Robinson projection.
*
* */
'use strict';
var A1 = 1.340264, A2 = -0.081106, A3 = 0.000893, A4 = 0.003796, M = Math.sqrt(3) / 2.0, scale = 74.03120656864502;
var EqualEarth = /** @class */ (function () {
function EqualEarth() {
this.bounds = {
x1: -200.37508342789243,
x2: 200.37508342789243,
y1: -97.52595454902263,
y2: 97.52595454902263
};
}
EqualEarth.prototype.forward = function (lonLat) {
var d = Math.PI / 180, paramLat = Math.asin(M * Math.sin(lonLat[1] * d)), paramLatSq = paramLat * paramLat, paramLatPow6 = paramLatSq * paramLatSq * paramLatSq;
var x = lonLat[0] * d * Math.cos(paramLat) * scale / (M *
(A1 +
3 * A2 * paramLatSq +
paramLatPow6 * (7 * A3 + 9 * A4 * paramLatSq)));
var y = paramLat * scale * (A1 + A2 * paramLatSq + paramLatPow6 * (A3 + A4 * paramLatSq));
return [x, y];
};
EqualEarth.prototype.inverse = function (xy) {
var x = xy[0] / scale, y = xy[1] / scale, d = 180 / Math.PI, epsilon = 1e-9, iterations = 12;
var paramLat = y, paramLatSq, paramLatPow6, fy, fpy, dlat, i;
for (i = 0; i < iterations; ++i) {
paramLatSq = paramLat * paramLat;
paramLatPow6 = paramLatSq * paramLatSq * paramLatSq;
fy = paramLat * (A1 + A2 * paramLatSq + paramLatPow6 * (A3 + A4 * paramLatSq)) - y;
fpy = A1 + 3 * A2 * paramLatSq + paramLatPow6 * (7 * A3 + 9 * A4 * paramLatSq);
paramLat -= dlat = fy / fpy;
if (Math.abs(dlat) < epsilon) {
break;
}
}
paramLatSq = paramLat * paramLat;
paramLatPow6 = paramLatSq * paramLatSq * paramLatSq;
var lon = d * M * x * (A1 + 3 * A2 * paramLatSq + paramLatPow6 * (7 * A3 + 9 * A4 * paramLatSq)) / Math.cos(paramLat);
var lat = d * Math.asin(Math.sin(paramLat) / M);
return [lon, lat];
};
return EqualEarth;
}());
export default EqualEarth;