[gdal-dev] GDAL_WMS/TMS with local CRS and bbox problem

[Stefan Keller]

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)?

: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>