Hi All, I've created a TileCache layer that's being used to overlay tiles in a Google Maps page. That's working just fine, but I would also like to access this layer via a MapServer WMS call as well. I have tried to setup a GDAL_WMS file that can read the TileCache layer, but am getting "IReadBlock failed" errors when I try to run gdal_translate on it, or try to view the layer in a MapServer map.
Below are the pertinent details of my configuration. TileCache layer: ----------------------- [20m_global] type=MapServerLayer mapfile=/var/www/mapfiles/20m_global/20m_global.map #url=http://10.10.40.152/cgi-bin/mapserv?map=/var/www/mapfiles/20m_global/20m_global.map metaTile=true metaSize=2,2 metaBuffer=0,500 layers=imagery spherical_mercator=true srs=EPSG:900913 GDAL_WMS xml file: ------------------------------ <GDAL_WMS> <Service name="TileService"> <!--<ServerUrl>http://tile.openstreetmap.org/${z}/${x}/${y}.png</ServerUrl>--> <ServerUrl>http://10.10.10.143/cgi-bin/tilecache-2.04/tilecache.cgi/1.0.0/v2_80m_global/{Z}/{X}/{Y}.png</ServerUrl> </Service> <DataWindow> <UpperLeftX>-20037508.34</UpperLeftX> <UpperLeftY>20037508.34</UpperLeftY> <LowerRightX>20037508.34</LowerRightX> <LowerRightY>-20037508.34</LowerRightY> <TileLevel>11</TileLevel> <TileCountX>1</TileCountX> <TileCountY>1</TileCountY> <YOrigin>top</YOrigin> </DataWindow> <Projection>EPSG:900913</Projection> <BlockSizeX>256</BlockSizeX> <BlockSizeY>256</BlockSizeY> <BandsCount>3</BandsCount> <Cache/> </GDAL_WMS> gdalinfo output: --------------------- $ gdalinfo tilecache.xml Driver: WMS/OGC Web Map Service Files: tilecache.xml Size is 524288, 524288 Coordinate System is: PROJCS["Google Maps Global Mercator", GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.01745329251994328, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4326"]], PROJECTION["Mercator_2SP"], PARAMETER["standard_parallel_1",0], PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",0], PARAMETER["false_easting",0], PARAMETER["false_northing",0], UNIT["Meter",1], EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgri...@null +wktext +no_defs"], AUTHORITY["EPSG","900913"]] Origin = (-20037508.339999999850988,20037508.339999999850988) Pixel Size = (76.437028274536132,-76.437028274536132) Corner Coordinates: Upper Left (-20037508.340,20037508.340) (180d 0'0.00"W, 85d 3'4.06"N) Lower Left (-20037508.340,-20037508.340) (180d 0'0.00"W, 85d 3'4.06"S) Upper Right (20037508.340,20037508.340) (180d 0'0.00"E, 85d 3'4.06"N) Lower Right (20037508.340,-20037508.340) (180d 0'0.00"E, 85d 3'4.06"S) Center ( 0.0000000, 0.0000000) ( 0d 0'0.01"E, 0d 0'0.00"S) Band 1 Block=256x256 Type=Byte, ColorInterp=Undefined Overviews: 262144x262144, 131072x131072, 65536x65536, 32768x32768, 16384x16384, 8192x8192, 4096x4096, 2048x2048, 1024x1024, 512x512, 256x256 Band 2 Block=256x256 Type=Byte, ColorInterp=Undefined Overviews: 262144x262144, 131072x131072, 65536x65536, 32768x32768, 16384x16384, 8192x8192, 4096x4096, 2048x2048, 1024x1024, 512x512, 256x256 Band 3 Block=256x256 Type=Byte, ColorInterp=Undefined Overviews: 262144x262144, 131072x131072, 65536x65536, 32768x32768, 16384x16384, 8192x8192, 4096x4096, 2048x2048, 1024x1024, 512x512, 256x256 gdal_translate error: ---------------------------- $ gdal_translate -outsize 1% 1% tilecache.xml test.tif Input file size is 524288, 524288 0ERROR 4: `/vsimem/wms/0x8503470/wmsresult.dat' not recognised as a supported file format. ERROR 1: GDALWMS: Unable to open downloaded block. ERROR 1: GDALWMS: ReadBlockFromFile failed. ERROR 1: IReadBlock failed at X offset 0, Y offset 0 ERROR 4: `/vsimem/wms/0x809dc08/wmsresult.dat' not recognised as a supported file format. ERROR 1: GDALWMS: Unable to open downloaded block. ERROR 1: GDALWMS: ReadBlockFromFile failed. ERROR 1: IReadBlock failed at X offset 0, Y offset 0 MapServer error: ----------------------- msDrawMap(): Image handling error. Failed to draw layer named 'imagery'. IReadBlock failed at X offset 1442, Y offset 607: Unable to access file. GDALRasterIO() failed: drawGDAL() If you see anything that jumps out at you as being incorrect, I'd love to hear from you. Thanks, Roger _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
