doevisualizations
Version:
Data Visualization Library based on RequireJS and D3.js (v4+)
16 lines (11 loc) • 314 B
JavaScript
import {asin, cos, sin} from "../math";
export function cylindricalEqualAreaRaw(phi0) {
var cosPhi0 = cos(phi0);
function forward(lambda, phi) {
return [lambda * cosPhi0, sin(phi) / cosPhi0];
}
forward.invert = function(x, y) {
return [x / cosPhi0, asin(y * cosPhi0)];
};
return forward;
}