Le vendredi 15 janvier 2016 12:46:33, Stefan Keller a écrit : > Hi > > I have a GDAL .vrt from a GDAL_WMS/TMS which was tweaked to > projection/CRS EPSG:21781 [see below *]. > > The problem here is, that the bbox is way too large. It should be > Switzerland but it's larger than europe. (in 21781 it's lowerleftX > 480000 loverleft Y 70000 upperrightX 840000 upperrightY 300000) > > How can I configure the correct bbox in the .vrt? > Or is this a problem at server side config. (http://tile.osm.ch/21781/)? > In fact I'm wondering anyhow about these current UpperLeftX/UpperLeftY > numbers...(which somehow work)?
You have to figure out/find somewhere what is the extent at zoom level 0 in EPSG:21781 (thus representing a large part of the world) and put it in the GDAL_WMS definition. Then you can create a view on Switzerland with gdal_translate -srcwin -of VRT. > > :Stefan > > <GDAL_WMS> > <Service name="TMS"> > <ServerUrl>http://tile.osm.ch/21781/${z}/${x}/${y}.png</ServerUrl> > </Service> > <DataWindow> > <UpperLeftX>-20037508.34</UpperLeftX> > <UpperLeftY>20037508.34</UpperLeftY> > <LowerRightX>20037508.34</LowerRightX> > <LowerRightY>-20037508.34</LowerRightY> > <TileLevel>18</TileLevel> > <TileCountX>1</TileCountX> > <TileCountY>1</TileCountY> > <YOrigin>top</YOrigin> > </DataWindow> > <Projection>EPSG:21781</Projection> > <BlockSizeX>256</BlockSizeX> > <BlockSizeY>256</BlockSizeY> > <BandsCount>3</BandsCount> > <Cache /> > </GDAL_WMS> > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
