Add support for GetFeatureInfo WMS functionality

[*Martin*]

WMS servers may provide GetFeatureInfo functionality which is basically querying for various properties of a map object by selected coordinates. It would be very useful if JOSM would have it. It could be done by right-clicking on the WMS map layer and selecting "Get WMS Feature Info" from context menu. Result could be displayed in the tabular form, or in HTML view.

[Don-vip]

We need to know a public WMS server that implements this functionality if ever we want to support it.

[anonymous]

For example ​https://zbgisws.skgeodesy.sk/zbgis_vodstvo_wms_featureinfo/service.svc/get?request=GetCapabilities&service=WMS (country Slovakia).

[mdk]

I just randomly take a look at Maps/Switzerland and found nearly everywhere GetCapabilities:
​https://map.bern.ch/wms/OpenData/proxy.php?request=GetCapabilities&service=WMS
​https://wms.zh.ch/OGDOrthoZH?request=GetCapabilities&service=WMS
​https://wms.zh.ch/OGDLidarZH?request=GetCapabilities&service=WMS
​https://ows.geo.tg.ch/geofy_access_proxy/basisplanf?request=GetCapabilities&service=WMS
​https://ows.geo.tg.ch/geofy_access_proxy/radwege?request=GetCapabilities&service=WMS
​https://ows-raster.geo.tg.ch/geofy_access_proxy/orthofoto2017?request=GetCapabilities&service=WMS
​https://www.ogd.stadt-zuerich.ch/wms/geoportal/Orthofoto_2013_Stadt_Zuerich___Fruehling?request=GetCapabilities&service=WMS
​https://geo.so.ch/api/wms?request=GetCapabilities&service=WMS

And some times there are different URLs (start at ​https://ge.ch/sitgags2/rest/services/RASTER) like
​https://ge.ch/sitgags2/rest/services/RASTER/ORTHOPHOTOS_2019/MapServer/WMTS/1.0.0/WMTSCapabilities.xml
[Edit] sorry, this is for WMTS. WMS is:
​https://ge.ch/sitgags2/services/RASTER/MNA_RELIEF_SURFACE/MapServer/WMSServer?request=GetCapabilities&service=WMS
[Edit 2] Correct URL for ORTHOPHOTOS_2019 WMS:
​https://ge.ch/sitgags2/services/RASTER/ORTHOPHOTOS_2019/MapServer/WMSServer?request=GetCapabilities&service=WMS

[*Martin*]

More sources but I am not sure if all have GetFeatureInfo capability:
​https://www.geoportal.sk/sk/inspire/zobrazovacie-sluzby/
​https://www.geoportal.sk/sk/sluzby/mapove-sluzby/wms/wms-zbgis.html

[mdk]

They have. The URL ​​https://www.geoportal.sk/sk/inspire/zobrazovacie-sluzby/ leads to
​https://zbgisws.skgeodesy.sk/zbgis_wms_featureinfo/service.svc/get?request=GetCapabilities&service=WMS
​https://kataster.skgeodesy.sk/eskn/services/NR/kn_wms_norm/MapServer/WmsServer?request=GetCapabilities&service=WMS
​https://zbgisws.skgeodesy.sk/zbgis_referencny_geodeticky_bod_wms_featureinfo/service.svc/get?request=GetCapabilities&service=WMS
​https://zbgisws.skgeodesy.sk/zbgis_antropogenne_prvky_wms_featureinfo/service.svc/get?request=GetCapabilities&service=WMS
​https://zbgisws.skgeodesy.sk/zbgis_vyskopis_wms_featureinfo/service.svc/get?request=GetCapabilities&service=WMS
​https://zbgisws.skgeodesy.sk/klady_mapovych_listov_wms/service.svc/get?request=GetCapabilities&service=WMS
etc.

But I don't know if they are legal sources for OSM, because Maps/Slovakia has only one WMS service:
​https://zbgisws.skgeodesy.sk/zbgis_wms_featureinfo/service.svc/get?request=GetCapabilities&service=WMS
(which also support GetCapabilities)

[*Martin*]

But I don't know if they are legal sources for OSM

I provided them only as samples for developiong this feature in JOSM and not for OSM mapping.

[mdk]

I think request=GetCapabilities&service=WMS is a standard functionality for all WMS servers.

[mdk]

Perhaps it would make sense to create a tool (or unit test) which compares the GetCapabilities results from WMS servers with the Maps entries like ImageryCompare is comparing these data with ELI.

[Don-vip]

@mdk I was just asking for a GetFeatureInfo example. Of course all WMS servers have to support GetCapabilities, that's how WMS works. The first link gave me what I needed:

<GetFeatureInfo>
  <Format>application/vnd.esri.wms_raw_xml</Format>
  <Format>application/vnd.esri.wms_featureinfo_xml</Format>
  <Format>application/vnd.ogc.wms_xml</Format>
  <Format>application/geojson</Format>
  <Format>text/xml</Format>
  <Format>text/html</Format>
  <Format>text/plain</Format>
  <DCPType>
    <HTTP>
      <Get>
        <OnlineResource xlink:type="simple" xlink:href="https://zbgisws.skgeodesy.sk/zbgis_vodstvo_wms_featureinfo/service.svc/get?"/>
      </Get>
    </HTTP>
  </DCPType>
</GetFeatureInfo>