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Calculate tile grid extent from extent of bottom-level tile matrix

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Prefers extent derived from the tile matrix set in the capabilities
over default projection extent.
This commit is contained in:
Mateusz Łoskot
2019-01-21 15:21:39 +01:00
parent 8f46bb563b
commit 98e8bec370
4 changed files with 77 additions and 20 deletions
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28
test/spec/ol/format/wmts/ogcsample.xml
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@@ -92,6 +92,9 @@ access interface to some TileMatrixSets</ows:Abstract>
<TileMatrixSetLink>
<TileMatrixSet>google3857</TileMatrixSet>
</TileMatrixSetLink>
<TileMatrixSetLink>
<TileMatrixSet>google3857subset</TileMatrixSet>
</TileMatrixSetLink>
<ResourceURL format="image/png" resourceType="tile" template="http://www.example.com/wmts/coastlines/{TileMatrix}/{TileRow}/{TileCol}.png"/>
<ResourceURL format="application/gml+xml; version=3.1" resourceType="FeatureInfo" template="http://www.example.com/wmts/coastlines/{TileMatrixSet}/{TileMatrix}/{TileRow}/{TileCol}/{J}/{I}.xml"/>
<Dimension>
@@ -372,6 +375,29 @@ access interface to some TileMatrixSets</ows:Abstract>
<MatrixHeight>7000</MatrixHeight>
</TileMatrix>
</TileMatrixSet>
</Contents>
<TileMatrixSet>
<!-- A custom tile matrix set based on google3857 with tiles at each level covering only part of projection space (extent) -->
<ows:Identifier>google3857subset</ows:Identifier>
<ows:SupportedCRS>urn:ogc:def:crs:EPSG:6.18:3:3857</ows:SupportedCRS>
<TileMatrix>
<ows:Identifier>18</ows:Identifier>
<ScaleDenominator>2132.72958385</ScaleDenominator>
<TopLeftCorner>-10000000 10000000</TopLeftCorner>
<TileWidth>256</TileWidth>
<TileHeight>256</TileHeight>
<MatrixWidth>1</MatrixWidth>
<MatrixHeight>1</MatrixHeight>
</TileMatrix>
<TileMatrix>
<ows:Identifier>18</ows:Identifier>
<ScaleDenominator>1066.36479193</ScaleDenominator>
<TopLeftCorner>-10000000 10000000</TopLeftCorner>
<TileWidth>256</TileWidth>
<TileHeight>256</TileHeight>
<MatrixWidth>2</MatrixWidth>
<MatrixHeight>2</MatrixHeight>
</TileMatrix>
</TileMatrixSet>
</Contents>
<ServiceMetadataURL xlink:href="http://www.maps.bob/wmts/1.0.0/WMTSCapabilities.xml"/>
</Capabilities>

4
test/spec/ol/format/wmtscapabilities.test.js
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@@ -54,11 +54,13 @@ describe('ol.format.WMTSCapabilities', function() {
expect(layer.Style[0].LegendURL[0].format).to.be.eql('image/png');
expect(layer.TileMatrixSetLink).to.be.an('array');
expect(layer.TileMatrixSetLink).to.have.length(2);
expect(layer.TileMatrixSetLink).to.have.length(3);
expect(layer.TileMatrixSetLink[0].TileMatrixSet).to.be
.eql('BigWorldPixel');
expect(layer.TileMatrixSetLink[1].TileMatrixSet).to.be
.eql('google3857');
expect(layer.TileMatrixSetLink[2].TileMatrixSet).to.be
.eql('google3857subset');
const wgs84Bbox = layer.WGS84BoundingBox;
expect(wgs84Bbox).to.be.an('array');