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Contents
require("../env");
require("../../d3");
require("../../d3.geo");
var vows = require("vows"),
assert = require("assert");
var suite = vows.describe("d3.geo.mercator");
suite.addBatch({
"mercator": {
topic: function() {
return d3.geo.mercator().translate([0, 0]).scale(100);
},
"Arctic": function(mercator) {
var coords = mercator([0, 85]);
assert.inDelta(coords[0], 0, 1e-6);
assert.inDelta(coords[1], -49.8362085, 1e-6);
var lonlat = mercator.invert(coords);
assert.inDelta(lonlat[0], 0, 1e-6);
assert.inDelta(lonlat[1], 85, 1e-6);
},
"Antarctic": function(mercator) {
var coords = mercator([0, -85]);
assert.inDelta(coords[0], 0, 1e-6);
assert.inDelta(coords[1], 49.8362085, 1e-6);
var lonlat = mercator.invert(coords);
assert.inDelta(lonlat[0], 0, 1e-6);
assert.inDelta(lonlat[1], -85, 1e-6);
},
"Hawaii": function(mercator) {
var coords = mercator([-180, 0]);
assert.inDelta(coords[0], -50, 1e-6);
assert.inDelta(coords[1], 0, 1e-6);
var lonlat = mercator.invert(coords);
assert.inDelta(lonlat[0], -180, 1e-6);
assert.inDelta(lonlat[1], 0, 1e-6);
},
"Phillipines": function(mercator) {
var coords = mercator([180, 0]);
assert.inDelta(coords[0], 50, 1e-6);
assert.inDelta(coords[1], 0, 1e-6);
var lonlat = mercator.invert(coords);
assert.inDelta(lonlat[0], 180, 1e-6);
assert.inDelta(lonlat[1], 0, 1e-6);
},
"Inversion works for non-zero translation": function() {
var mercator = d3.geo.mercator().translate([123, 99]).scale(100),
coords = mercator([0, 85]),
lonlat = mercator.invert(coords);
assert.inDelta(lonlat[0], 0, 1e-6);
assert.inDelta(lonlat[1], 85, 1e-6);
}
}
});
suite.export(module);
Version data entries
31 entries across 31 versions & 2 rubygems