[MapProxy] Problems with WMTS grid configuration in MapProxy

[Oliver Tonnhofer]

Hi,

Geoserver and MapProxy use different methods to calculate a tile grid. You need to convert the actual WMTS TileMatrixSet to a MapProxy grid. There is no script for that but you’ll find some guidance in this mail: http://lists.osgeo.org/pipermail/mapproxy/2013-August/001674.html

Please let us know if it works and how the final grid looks like.

Regards,
Oliver

-- 
Oliver Tonnhofer  | Omniscale GmbH & Co KG  | http://omniscale.com
OpenStreetMap WMS and tile services         | http://maps.omniscale.com




> On 01.09.2015, at 12:17, Daniel L.S. <pumukovic at hotmail.com> wrote:
> 
> Hi,
> 
> we are trying to configure a WMS service from our WMTS Geoserver service. Only we have successful results when we define the bounding box of the gridset at geoserver with "compute from maximum extent of CRS" option. 
> 
> When we use a custom bounding box we always get an offset of tiles.
> 
> This is our WMTS capabilities:
> 
> <TileMatrixSet>
>     <ows:Identifier>EPSG:25831</ows:Identifier>
>     <ows:SupportedCRS>urn:ogc:def:crs:EPSG::25831</ows:SupportedCRS>
>     <TileMatrix>
>         <ows:Identifier>EPSG:25831:0</ows:Identifier>
>         <ScaleDenominator>3.1180245535714287E7</ScaleDenominator>
>         <TopLeftCorner>-1615000.0 5235000.0</TopLeftCorner>
>         <TileWidth>256</TileWidth>
>         <TileHeight>256</TileHeight>
>         <MatrixWidth>1</MatrixWidth>
>         <MatrixHeight>1</MatrixHeight>
>     </TileMatrix>
>     <TileMatrix>
>         <ows:Identifier>EPSG:25831:1</ows:Identifier>
>         <ScaleDenominator>1.5590122767857144E7</ScaleDenominator>
>         <TopLeftCorner>-1615000.0 5235000.0</TopLeftCorner>
>         <TileWidth>256</TileWidth>
>         <TileHeight>256</TileHeight>
>         <MatrixWidth>2</MatrixWidth>
>         <MatrixHeight>2</MatrixHeight>
>     </TileMatrix>
> ....
> 
> 
> 
> We defined 22 zoom levels 
> 
> and our .yaml:
> 
> grids:
> 
>     geobase_grupo_grid:
>       srs: 'EPSG:25831'
>       bbox: [-1615000, 3000000, 620000, 5000000] # BBox geoserver gridset
>       bbox_srs: 'EPSG:25831'
>       origin: 'nw'
>       res: [
>          #  res            level     scale @90.7 DPI
>          8730.4687500000, #  0    31180245.53571429
>          4365.2343750000, #  1    15590122.76785714
>          2182.6171875000, #  2     7795061.38392857
>          1091.3085937500, #  3     3897530.69196429
>           545.6542968750, #  4     1948765.34598214
>           272.8271484375, #  5      974382.67299107
>           136.4135742188, #  6      487191.33649554
>            68.2067871094, #  7      243595.66824777
>            34.1033935547, #  8      121797.83412388
>            17.0516967773, #  9       60898.91706194
>             8.5258483887, # 10       30449.45853097
>             4.2629241943, # 11       15224.72926549
>             2.1314620972, # 12        7612.36463274
>             1.0657310486, # 13        3806.18231637
>             0.5328655243, # 14        1903.09115819
>             0.2664327621, # 15         951.54557909
>             0.1332163811, # 16         475.77278955
>             0.0666081905, # 17         237.88639477
>             0.0333040953, # 18         118.94319739
>             0.0166520476, # 19          59.47159869
>             0.0083260238, # 20          29.73579935
>             0.0041630119, # 21          14.86789967
>     ]
> 
> 
> Our problem starts with the definition of our gridset bbox in mapproxy because in geoserver we have 
> [-1615000, 3000000, 620000, 5000000]  but this definition in the capabilities show <TopLeftCorner>-1615000.0 5235000.0</TopLeftCorner> result for that gridset. We don't understand than differences.
> 
> Some help, tips would be welcome!
> 
> Thanks a lot!
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