QGIS-server WMTS custom tilematrix set: mismatch between original data and wmts version

[rduivenvoorde]

28992.zip

In that zip is data (a simple geopackage) AND a project file. Loading it in QGIS you should see:

From the official document:
https://www.geonovum.nl/uploads/standards/downloads/nederlandse_richtlijn_tiling_-_versie_1.1.pdf
AND from our national service WMTS url:
https://geodata.nationaalgeoregister.nl/wmts?VERSION=1.0.0&request=GetCapabilities
I got the following properties for the WMTS (and edited those in the Grids table):
EPSG:28992
Top: 903402.00 (these are meters)
Left: -285401.92
Min.Scale: 12288000.00
Last level 14

Creating a QGIS server from this results in the right tilematrix:

<TileMatrixSet><ows:Identifier>EPSG:28992</ows:Identifier><ows:SupportedCRS>EPSG:28992</ows:SupportedCRS><TileMatrix><ows:Identifier>0</ows:Identifier><ScaleDenominator>12288000</ScaleDenominator><TopLeftCorner>-285401.92 903402</TopLeftCorner><TileWidth>256</TileWidth><TileHeight>256</TileHeight><MatrixWidth>1</MatrixWidth><MatrixHeight>1</MatrixHeight></TileMatrix>

as from the offical pdok service:

<TileMatrixSet><ows:Identifier>EPSG:28992</ows:Identifier><ows:SupportedCRS>urn:ogc:def:crs:EPSG::28992</ows:SupportedCRS><TileMatrix><ows:Identifier>00</ows:Identifier><ScaleDenominator>1.2288E7</ScaleDenominator><TopLeftCorner>-285401.92 903402.0</TopLeftCorner><TileWidth>256</TileWidth><TileHeight>256</TileHeight><MatrixWidth>1</MatrixWidth><MatrixHeight>1</MatrixHeight></TileMatrix>

So I think that is ok. Creating the WMTS now and requesting it in the WMS/WMTS dialog show the proper layer and tilesets:

But then loading the layer shows it is shifted:

To double check you can add the 'opentopo' layer from this public WMTS:

https://geodata.nationaalgeoregister.nl/wmts?VERSION=1.0.0&request=GetCapabilities

As you can see the wmts seems shifted:

NOTE: we did have this kind of shifts earlier, when we used different proj params for EPSG:28992, and the default epsg params where not right yet in the official db...

But as you can see the data itself is exactly mapping the PDOK WMTS. and I would think the project/data and the server/data would use the same epsg:28992 definitions?

[rldhont]

@rduivenvoorde can you provide data and project ?

[rduivenvoorde]

yes yes, sorry. I'm busy, I accidently push the OK button... :-)

[rldhont]

It was juste a reminder, thanks