Sha256: 9cbeb30d1d9a0d7fad85b131124ee49be3b0adb3f0ebfe2259e71e7a231607c4
Contents?: true
Size: 438 Bytes
Versions: 4
Compression:
Stored size: 438 Bytes
Contents
function craster(λ, φ) {
var sqrt3 = Math.sqrt(3);
return [
sqrt3 * λ * (2 * Math.cos(2 * φ / 3) - 1) / sqrtπ,
sqrt3 * sqrtπ * Math.sin(φ / 3)
];
}
craster.invert = function(x, y) {
var sqrt3 = Math.sqrt(3),
φ = 3 * asin(y / (sqrt3 * sqrtπ));
return [
sqrtπ * x / (sqrt3 * (2 * Math.cos(2 * φ / 3) - 1)),
φ
];
};
(d3.geo.craster = function() { return projection(craster); }).raw = craster;
Version data entries
4 entries across 4 versions & 1 rubygems