[MapProxy] WMTS Source Support

[Travis Kirstine]

Ryan

Did you try something like this?


grids:
   source_webmerc:
      srs: EPSG:3857
      res_factor: 2
      num_levels: 22
      bbox: [-20037508*.3428*,-20037508*.3428*,20037508*.3428*,20037508
*.3428*]
      bbox_srs: EPSG:3857
      tile_size: [256,256]
      origin: nw












On 26 September 2017 at 00:42, Ryan How <ryan at bitworks.com.au> wrote:

> Hi,
>
> I am accessing a WMTS Server as a source for MapProxy. I am using the
> RESTful format and have set it up as a tile source. So far so good.
>
> The problem I am having is that the WMTS Server is advertising a slighty
> different TopLeftCorner attribute in it's tile matrix to the standard
> EPSG:3857 one. So all my tiles are ending up shifted to where they should
> be, just a few metres in out in this case, but it is enough so that it
> doesn't line up with other imagery and data points.
>
> I am not sure how to set this up in MapProxy to shift the tiles to the
> correct position. I looked at setting up a new grid, however there doesn't
> appear to be a way to reflect the TopLeftCorner element.
>
> Here is a snippet from the Capabilities Document
>
> <TileMatrixSet>
> <ows:Identifier>XXX</ows:Identifier>
> <ows:SupportedCRS>EPSG:3857</ows:SupportedCRS>
> <TileMatrix>
> <ows:Identifier>05</ows:Identifier>
> <ScaleDenominator>17471320.7509</ScaleDenominator>
> *<TopLeftCorner>-20037509.5428 20037506.7948</TopLeftCorner>*
> <TileWidth>256</TileWidth>
> <TileHeight>256</TileHeight>
> <MatrixWidth>32</MatrixWidth>
> <MatrixHeight>32</MatrixHeight>
> </TileMatrix>
> ...
> </TileMatrixSet>
>
> You can compare this with the standard TopLeftCorner for EPSG:3857 which is
>
> <TopLeftCorner>-2003750*8.3428* 2003750*8.3428*</TopLeftCorner>
>
> Can anyone point me in the right direction how I might have MapProxy
> correctly load the tiles?
>
>
> So I expect that when it serves them up along with other layers, it will
> need to request 4 tiles, stitch them, then crop out the required tile and
> serve that up.
>
>
> Thanks, Ryan
>
>
>
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