[Tilecache] help with gdal-wms-c driver

Wed Jun 25 23:12:16 EDT 2008

Hi Richard,
Try setting your resolutions array parameter in openlayers to the list/ 
array you are seeing in the error message. In my configuration I have  
matching bounding box and resolutions. I'm also setting the map  
projection in openlayers and tilecache to what my datum is.

I don't have my configs in front of me but if you still have problems  
I can help you sort it out and give you my example tomorrow.

On Jun 25, 2008, at 3:09 PM, Richard Duivenvoorde wrote:

> Hi List,
> after reading
> http://crschmidt.net/blog/282/openaerialmap-using-with-other-tools/
> and
> http://wiki.openaerialmap.org/Using_With_MapServer
>
> I thought it would be nice to be able to have a wms-interface in front
> of 'our' dutch openstreetmap development server
> http://tile.openstreetmap.nl/
>
> But failing to accomplish this (I thought because of the 'strange'
> resolutions/scales), I seeded my own tilecache with very simple scales
> and bboxes:
> http://www.duif.net/osmtilecache/tilecache2.py/1.0.0/osmpostgis2/
> and an OpenLayers-test with a TMS layer in front:
> http://www.duif.net/osm/wmsct.html
> getting tiles from the above mentioned tilecache.
>
> But the main-goal was to be able to put a wms in front of it:
>
> <GDAL_WMS>
>     <Service name="WMS">
>         <Version>1.1.1</Version>
> <ServerUrl>http://www.duif.net/osmtilecache/tilecache2.py/</ServerUrl>
>         <Layers>osmpostgis2</Layers>
>         <SRS>EPSG:28992</SRS>
>     </Service>
>     <DataWindow>
>         <UpperLeftX>0</UpperLeftX>
>         <UpperLeftY>600000</UpperLeftY>
>         <LowerRightX>300000</LowerRightX>
>         <LowerRightY>300000</LowerRightY>
>         <SizeX>524288</SizeX> <!-- ??? -->
>         <SizeY>524288</SizeY>
>         <TileLevel>11</TileLevel>
>     </DataWindow>
>     <Projection>EPSG:28992</Projection>
>     <!--<OverviewCount>12</OverviewCount>-->
>     <BlockSizeX>256</BlockSizeX>
>     <BlockSizeY>256</BlockSizeY>
>     <BandsCount>3</BandsCount>
> </GDAL_WMS>
>
> and a layer in a wms:
>
> LAYER
>     name  "osmnl"
>     METADATA
>       "wms_title" "osmnl"
>       "wms_srs" "epsg:28992"
>     END
>     type raster
>     status default
>     data "/usr/lib/cgi-bin/osmpostgis2_cache.xml"
>     projection "init=epsg:28992" end
>     #offsite 0 0 0
> END
>
> and an openlayer demo page:
> http://www.duif.net/osm/wmsc.html
>
> But I keep failing in getting this to work. I'm not able to build a
> configuration that requests the right tiles to tilecache. All request
> from mapserver to the tilecache give errors like:
>
> An error occurred: can't find resolution index for 1171.875000.
> Available resolutions are:
> [2048.0, 1024.0, 512.0, 256.0, 128.0, 64.0, 32.0, 16.0, 8.0, 4.0, 2.0]
>
> Can somebody help me to explain HOW openlayers comes to url's like:
> http://www.duif.net/cgi-bin/mapserv?map=osmpostgis2.map&TYPE=jpeg&LAYERS=osmnl&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&FORMAT=image%2Fjpeg&SRS=EPSG%3A28992&BBOX=0,300000,524288,824288&WIDTH=256&HEIGHT=256
> giving rise to:
> http://www.duif.net/osmtilecache/tilecache2.py/?request=GetMap&version=1.1.1&layers=osmpostgis2&styles=&srs=EPSG:28992&format=image/jpeg&width=256&height=256&bbox=0.00000000,300000.00000000,300000.00000000,600000.00000000
> etc  etc
>
> gdal info output from the xml:
>
> Driver: WMS/OGC Web Map Service
> Files: /usr/lib/cgi-bin/osmpostgis2_cache.xml
> Size is 524288, 524288
> Coordinate System is:
> PROJCS["Amersfoort / RD New",
>     GEOGCS["Amersfoort",
>         DATUM["Amersfoort",
>             SPHEROID["Bessel 1841",6377397.155,299.1528128,
>                 AUTHORITY["EPSG","7004"]],
>             AUTHORITY["EPSG","6289"]],
>         PRIMEM["Greenwich",0,
>             AUTHORITY["EPSG","8901"]],
>         UNIT["degree",0.01745329251994328,
>             AUTHORITY["EPSG","9122"]],
>         AUTHORITY["EPSG","4289"]],
>     UNIT["metre",1,
>         AUTHORITY["EPSG","9001"]],
>     PROJECTION["Oblique_Stereographic"],
>     PARAMETER["latitude_of_origin",52.15616055555555],
>     PARAMETER["central_meridian",5.38763888888889],
>     PARAMETER["scale_factor",0.9999079],
>     PARAMETER["false_easting",155000],
>     PARAMETER["false_northing",463000],
>     AUTHORITY["EPSG","28992"]]
> Origin = (0.000000000000000,600000.000000000000000)
> Pixel Size = (0.572204589843750,-0.572204589843750)
> Corner Coordinates:
> Upper Left  (       0.000,  600000.000) (  3d 3'31.41"E,  
> 53d21'53.77"N)
> Lower Left  (       0.000,  300000.000) (  3d11'41.21"E,  
> 50d40'12.02"N)
> Upper Right (  300000.000,  600000.000) (  7d33'59.07"E, 53d22'3.89"N)
> Lower Right (  300000.000,  300000.000) (  7d26'20.80"E,  
> 50d40'21.39"N)
> Center      (  150000.000,  450000.000) (  5d18'53.12"E, 52d  
> 2'21.41"N)
> 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
>
> Any help VERY much appreciated,
>
> Regards,
>
> Richard Duivenvoorde
>
>
>
>
>
>
>
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