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adds TileMatrixSetLimits to WMTS format reader

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enhance wmtstilegrid to use it when building matrixId and resolution arrays
This commit is contained in:
Thomas Tilak
2016-07-18 17:55:21 +02:00
parent fd3c9f58bf
commit 1f04a0aad9
6 changed files with 725 additions and 18 deletions
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src/ol/tilegrid/wmts.js
+36 -15
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@@ -65,15 +65,19 @@ ol.tilegrid.WMTS.prototype.getMatrixIds = function() {
/**
* Create a tile grid from a WMTS capabilities matrix set.
* Create a tile grid from a WMTS capabilities matrix set and an
* optional TileMatrixSetLimits.
* @param {Object} matrixSet An object representing a matrixSet in the
* capabilities document.
* @param {ol.Extent=} opt_extent An optional extent to restrict the tile
* ranges the server provides.
* @param {Array.<Object>=} opt_matrixLimits An optional object representing
* the available matrices for tileGrid.
* @return {ol.tilegrid.WMTS} WMTS tileGrid instance.
* @api
*/
ol.tilegrid.WMTS.createFromCapabilitiesMatrixSet = function(matrixSet, opt_extent) {
ol.tilegrid.WMTS.createFromCapabilitiesMatrixSet = function(matrixSet, opt_extent,
opt_matrixLimits) {
/** @type {!Array.<number>} */
var resolutions = [];
@@ -86,6 +90,8 @@ ol.tilegrid.WMTS.createFromCapabilitiesMatrixSet = function(matrixSet, opt_exten
/** @type {!Array.<ol.Size>} */
var sizes = [];
var matrixLimits = opt_matrixLimits !== undefined ? opt_matrixLimits : [];
var supportedCRSPropName = 'SupportedCRS';
var matrixIdsPropName = 'TileMatrix';
var identifierPropName = 'Identifier';
@@ -106,21 +112,36 @@ ol.tilegrid.WMTS.createFromCapabilitiesMatrixSet = function(matrixSet, opt_exten
});
matrixSet[matrixIdsPropName].forEach(function(elt, index, array) {
matrixIds.push(elt[identifierPropName]);
var resolution = elt[scaleDenominatorPropName] * 0.28E-3 / metersPerUnit;
var tileWidth = elt[tileWidthPropName];
var tileHeight = elt[tileHeightPropName];
if (switchOriginXY) {
origins.push([elt[topLeftCornerPropName][1],
elt[topLeftCornerPropName][0]]);
var matrixAvailable;
// use of matrixLimits to filter TileMatrices from GetCapabilities
// TileMatrixSet from unavailable matrix levels.
if (matrixLimits.length > 0) {
matrixAvailable = ol.array.find(matrixLimits,
function(elt_ml, index_ml, array_ml) {
return elt[identifierPropName] == elt_ml[matrixIdsPropName];
});
} else {
origins.push(elt[topLeftCornerPropName]);
matrixAvailable = true;
}
if (matrixAvailable) {
matrixIds.push(elt[identifierPropName]);
var resolution = elt[scaleDenominatorPropName] * 0.28E-3 / metersPerUnit;
var tileWidth = elt[tileWidthPropName];
var tileHeight = elt[tileHeightPropName];
if (switchOriginXY) {
origins.push([elt[topLeftCornerPropName][1],
elt[topLeftCornerPropName][0]]);
} else {
origins.push(elt[topLeftCornerPropName]);
}
resolutions.push(resolution);
tileSizes.push(tileWidth == tileHeight ?
tileWidth : [tileWidth, tileHeight]);
// top-left origin, so height is negative
sizes.push([elt['MatrixWidth'], -elt['MatrixHeight']]);
}
resolutions.push(resolution);
tileSizes.push(tileWidth == tileHeight ?
tileWidth : [tileWidth, tileHeight]);
// top-left origin, so height is negative
sizes.push([elt['MatrixWidth'], -elt['MatrixHeight']]);
});
return new ol.tilegrid.WMTS({