File size: 445 Bytes
bc20498 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
import {atan, cos, sin} from "../math.js";
import {azimuthalInvert} from "./azimuthal.js";
import projection from "./index.js";
export function stereographicRaw(x, y) {
var cy = cos(y), k = 1 + cos(x) * cy;
return [cy * sin(x) / k, sin(y) / k];
}
stereographicRaw.invert = azimuthalInvert(function(z) {
return 2 * atan(z);
});
export default function() {
return projection(stereographicRaw)
.scale(250)
.clipAngle(142);
}
|