mirror of
https://github.com/FoggedLens/iD.git
synced 2026-02-14 01:33:03 +00:00
52 lines
1.9 KiB
JavaScript
52 lines
1.9 KiB
JavaScript
iD.BackgroundSource = {};
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// derive the url of a 'quadkey' style tile from a coordinate object
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iD.BackgroundSource.template = function(template, subdomains, scaleExtent) {
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scaleExtent = scaleExtent || [0, 18];
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var generator = function(coord) {
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var u = '';
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for (var zoom = coord[2]; zoom > 0; zoom--) {
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var byte = 0;
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var mask = 1 << (zoom - 1);
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if ((coord[0] & mask) !== 0) byte++;
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if ((coord[1] & mask) !== 0) byte += 2;
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u += byte.toString();
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}
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// distribute requests against multiple domains
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var t = subdomains ?
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subdomains[coord[2] % subdomains.length] : '';
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return template
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.replace('{t}', t)
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.replace('{u}', u)
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.replace('{x}', coord[0])
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.replace('{y}', coord[1])
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.replace('{z}', coord[2]);
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};
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generator.scaleExtent = scaleExtent;
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return generator;
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};
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iD.BackgroundSource.Custom = function() {
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var template = window.prompt('Enter a tile template. Valid tokens are {z}, {x}, {y} for Z/X/Y scheme and {u} for quadtile scheme.');
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if (!template) return null;
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return iD.BackgroundSource.template(template, null, [0, 20]);
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};
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iD.BackgroundSource.Bing = iD.BackgroundSource.template(
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'http://ecn.t{t}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z',
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[0, 1, 2, 3], [0, 20]);
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iD.BackgroundSource.Tiger2012 = iD.BackgroundSource.template(
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'http://{t}.tile.openstreetmap.us/tiger2012_roads_expanded/{z}/{x}/{y}.png',
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['a', 'b', 'c'], [0, 17]);
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iD.BackgroundSource.OSM = iD.BackgroundSource.template(
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'http://{t}.tile.openstreetmap.org/{z}/{x}/{y}.png',
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['a', 'b', 'c'], [0, 18]);
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iD.BackgroundSource.MapBox = iD.BackgroundSource.template(
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'http://{t}.tiles.mapbox.com/v3/openstreetmap.map-4wvf9l0l/{z}/{x}/{y}.jpg70',
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['a', 'b', 'c'], [0, 16]);
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