Sha256: 54ca2a92e16cdf8c869bcc279af98890921cb484499001d1a6add7127d4e768f
Contents?: true
Size: 602 Bytes
Versions: 4
Compression:
Stored size: 602 Bytes
Contents
import "projection";
function wagner7(λ, φ) {
var s = .90631 * Math.sin(φ),
c0 = Math.sqrt(1 - s * s),
c1 = Math.sqrt(2 / (1 + c0 * Math.cos(λ /= 3)));
return [
2.66723 * c0 * c1 * Math.sin(λ),
1.24104 * s * c1
];
}
wagner7.invert = function(x, y) {
var t1 = x / 2.66723,
t2 = y / 1.24104,
p = Math.sqrt(t1 * t1 + t2 * t2),
c = 2 * asin(p / 2);
return [
3 * Math.atan2(x * Math.tan(c), 2.66723 * p),
p && asin(y * Math.sin(c) / (1.24104 * 0.90631 * p))
];
};
(d3.geo.wagner7 = function() { return projection(wagner7); }).raw = wagner7;
Version data entries
4 entries across 4 versions & 1 rubygems