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Cope with axis orientation for tiled WMS sources

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This commit is contained in:
Tom Payne
2013-02-21 20:22:28 +01:00
parent 6b26cbfb38
commit 66e5b1d736
3 changed files with 24 additions and 9 deletions
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7
src/ol/source/tiledwmssource.js
View File

@@ -52,19 +52,22 @@ ol.source.TiledWMS = function(tiledWMSOptions) {
baseParams[version >= '1.3' ? 'CRS' : 'SRS'] = projection.getCode();
goog.object.extend(baseParams, tiledWMSOptions.params);
var axisOrientation = projection.getAxisOrientation();
var tileUrlFunction;
if (tiledWMSOptions.urls) {
var tileUrlFunctions = goog.array.map(
tiledWMSOptions.urls, function(url) {
url = goog.uri.utils.appendParamsFromMap(url, baseParams);
return ol.TileUrlFunction.createBboxParam(url, tileGrid);
return ol.TileUrlFunction.createBboxParam(
url, tileGrid, axisOrientation);
});
tileUrlFunction = ol.TileUrlFunction.createFromTileUrlFunctions(
tileUrlFunctions);
} else if (tiledWMSOptions.url) {
var url = goog.uri.utils.appendParamsFromMap(
tiledWMSOptions.url, baseParams);
tileUrlFunction = ol.TileUrlFunction.createBboxParam(url, tileGrid);
tileUrlFunction =
ol.TileUrlFunction.createBboxParam(url, tileGrid, axisOrientation);
} else {
tileUrlFunction = ol.TileUrlFunction.nullTileUrlFunction;
}

13
src/ol/tileurlfunction.js
View File

@@ -73,19 +73,20 @@ ol.TileUrlFunction.createFromTileUrlFunctions = function(tileUrlFunctions) {
/**
* @param {string} baseUrl Base URL (may have query data).
* @param {ol.tilegrid.TileGrid} tileGrid Tile grid.
* @param {string} axisOrientation Axis orientation.
* @return {ol.TileUrlFunctionType} Tile URL function.
*/
ol.TileUrlFunction.createBboxParam = function(baseUrl, tileGrid) {
ol.TileUrlFunction.createBboxParam =
function(baseUrl, tileGrid, axisOrientation) {
return function(tileCoord) {
if (goog.isNull(tileCoord)) {
return undefined;
} else {
var tileExtent = tileGrid.getTileCoordExtent(tileCoord);
// FIXME Projection dependant axis order.
var bboxValue = [
tileExtent.minX, tileExtent.minY, tileExtent.maxX, tileExtent.maxY
].join(',');
return goog.uri.utils.appendParam(baseUrl, 'BBOX', bboxValue);
var bboxValues = axisOrientation.substr(0, 2) == 'ne' ?
[tileExtent.minY, tileExtent.minX, tileExtent.maxY, tileExtent.maxX] :
[tileExtent.minX, tileExtent.minY, tileExtent.maxX, tileExtent.maxY];
return goog.uri.utils.appendParam(baseUrl, 'BBOX', bboxValues.join(','));
}
};
};

13
test/spec/ol/tileurlfunction.test.js
View File

@@ -69,14 +69,25 @@ describe('ol.TileUrlFunction', function() {
});
});
it('creates expected URL', function() {
var epsg3857 = ol.Projection.getFromCode('EPSG:3857');
var tileUrlFunction = ol.TileUrlFunction.createBboxParam(
'http://wms?foo=bar', tileGrid);
'http://wms?foo=bar', tileGrid, epsg3857.getAxisOrientation());
var tileCoord = new ol.TileCoord(1, 0, 0);
var tileUrl = tileUrlFunction(tileCoord);
var expected = 'http://wms?foo=bar&BBOX=-20037508.342789244' +
'%2C20037508.342789244%2C0%2C40075016.68557849';
expect(tileUrl).toEqual(expected);
});
it('creates expected URL respecting axis orientation', function() {
var epsg4326 = ol.Projection.getFromCode('EPSG:4326');
var tileUrlFunction = ol.TileUrlFunction.createBboxParam(
'http://wms?foo=bar', tileGrid, epsg4326.getAxisOrientation());
var tileCoord = new ol.TileCoord(1, 0, 0);
var tileUrl = tileUrlFunction(tileCoord);
var expected = 'http://wms?foo=bar&BBOX=20037508.342789244' +
'%2C-20037508.342789244%2C40075016.68557849%2C0';
expect(tileUrl).toEqual(expected);
});
});
});