Description

WMTS GetFeatureInfo against the national OGC services at https://data.geopf.fr/wmts fail because apparently it expects the FORMAT parameter, which according to my reading of the WMTS spec is mandatory.

How to reproduce

• load a wmts layer from https://data.geopf.fr/wmts
• do a wmts GFI triggers https://data.geopf.fr/wmts?service=WMTS&request=GetFeatureInfo&layer=ADMINEXPRESS-COG-CARTO.LATEST&infoformat=application%2Fjson&style=normal&tilecol=260&tilerow=182&tilematrix=9&tilematrixset=PM_6_16&i=227&j=236

Expected Result
we should get a valid return value/feedback

Current Result

a 400 code with this ExceptionReport about missing FORMAT:

<ExceptionReport xmlns="http://www.opengis.net/ows/1.1">
<Exception exceptionCode="MissingParameterValue" >
  Parametre FORMAT absent.
</Exception>
</ExceptionReport>

adding a FORMAT=application/json parameter results in another ExceptionReport:

<ExceptionReport xmlns="http://www.opengis.net/ows/1.1">
<Exception exceptionCode="InvalidParameterValue" >
  Le format application/json n'est pas gere pour la couche ADMINEXPRESS-COG-CARTO.LATEST
</Exception>
</ExceptionReport>

which is another issue and blatantly wrong serverside, since this format is listed in the values for infoformat in https://data.geopf.fr/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetCapabilities

i'll bring up that last bit to the service admins, but in my opinion and interpretation of the spec mapstore should also send the format parameter here: https://github.com/geosolutions-it/MapStore2/blob/master/web/client/utils/mapinfo/wmts.js#L97