Sha256: 00dd7bd2e15ced0121040a08382fd6b9ce4f4fae88a4566093552acc9bc10351
Contents?: true
Size: 497 Bytes
Versions: 4
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Stored size: 497 Bytes
Contents
import "projection";
function nellHammer(λ, φ) {
return [
λ * (1 + Math.cos(φ)) / 2,
2 * (φ - Math.tan(φ / 2))
];
}
nellHammer.invert = function(x, y) {
var p = y / 2;
for (var i = 0, δ = Infinity; i < 10 && Math.abs(δ) > ε; i++) {
var c = Math.cos(y / 2);
y -= δ = (y - Math.tan(y / 2) - p) / (1 - .5 / (c * c));
}
return [
2 * x / (1 + Math.cos(y)),
y
];
};
(d3.geo.nellHammer = function() { return projection(nellHammer); }).raw = nellHammer;
Version data entries
4 entries across 4 versions & 1 rubygems