a19cb9ca64
We cannot assume that the matrixIds are ordered in the matrixSet. For example, they're not ordered in http://wxs.ign.fr/cle/geoportail/wmts?SERVICE=WMTS&REQUEST=GetCapabilities.
101 lines
2.5 KiB
JavaScript
101 lines
2.5 KiB
JavaScript
goog.provide('ol.tilegrid.WMTS');
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goog.require('goog.array');
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goog.require('goog.asserts');
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goog.require('ol.proj');
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goog.require('ol.tilegrid.TileGrid');
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/**
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* @constructor
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* @extends {ol.tilegrid.TileGrid}
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* @param {ol.tilegrid.WMTSOptions} options WMTS options.
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*/
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ol.tilegrid.WMTS = function(options) {
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goog.asserts.assert(
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options.resolutions.length == options.matrixIds.length);
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/**
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* @private
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* @type {!Array.<string>}
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*/
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this.matrixIds_ = options.matrixIds;
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// FIXME: should the matrixIds become optionnal?
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goog.base(this, {
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origin: options.origin,
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origins: options.origins,
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resolutions: options.resolutions,
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tileSize: options.tileSize,
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tileSizes: options.tileSizes
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});
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};
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goog.inherits(ol.tilegrid.WMTS, ol.tilegrid.TileGrid);
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/**
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* @param {number} z Z.
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* @return {string} MatrixId..
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*/
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ol.tilegrid.WMTS.prototype.getMatrixId = function(z) {
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goog.asserts.assert(0 <= z && z < this.matrixIds_.length);
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return this.matrixIds_[z];
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};
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/**
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* @return {Array.<string>} MatrixIds.
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*/
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ol.tilegrid.WMTS.prototype.getMatrixIds = function() {
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return this.matrixIds_;
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};
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/**
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* @param {Object} matrixSet An object representing a matrixSet in the
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* capabilities document.
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* @return {ol.tilegrid.WMTS} WMTS tileGrid instance.
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*/
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ol.tilegrid.WMTS.createFromCapabilitiesMatrixSet =
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function(matrixSet) {
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var resolutions = [];
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var matrixIds = [];
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var origins = [];
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var tileSizes = [];
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var supportedCRSPropName = 'supportedCRS';
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var matrixIdsPropName = 'matrixIds';
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var identifierPropName = 'identifier';
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var scaleDenominatorPropName = 'scaleDenominator';
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var topLeftCornerPropName = 'topLeftCorner';
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var tileWidthPropName = 'tileWidth';
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var tileHeightPropName = 'tileHeight';
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var projection = ol.proj.get(matrixSet[supportedCRSPropName]);
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var metersPerUnit = projection.getMetersPerUnit();
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goog.array.sort(matrixSet[matrixIdsPropName], function(a, b) {
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return b[scaleDenominatorPropName] - a[scaleDenominatorPropName];
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});
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goog.array.forEach(matrixSet[matrixIdsPropName],
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function(elt, index, array) {
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matrixIds.push(elt[identifierPropName]);
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origins.push(elt[topLeftCornerPropName]);
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resolutions.push(elt[scaleDenominatorPropName] * 0.28E-3 /
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metersPerUnit);
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tileSizes.push([elt[tileWidthPropName], elt[tileHeightPropName]]);
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});
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return new ol.tilegrid.WMTS({
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origins: origins,
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resolutions: resolutions,
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matrixIds: matrixIds,
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tileSizes: tileSizes
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});
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};
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