Restricting WMS GetFeatureInfo properties in OpenLayers

Question

I am working on a WMS-based OpenLayers project, which is pulling in data from the BGS WMS Servers. We're pulling the 1:50k bedrock layer from this WMS:

https://map.bgs.ac.uk/arcgis/services/BGS_Detailed_Geology/MapServer/WMSServer?

In OpenLayers 3 I am trying to query the WMS and display the attributes in an iFrame beneath the OpenLayers map. Using the following code, I am able to get the full metadata to display beneath the map.

map.on('singleclick', function(evt) {
            document.getElementById('info').innerHTML = '';
            var viewResolution = /** @type {number} */ (view.getResolution());
            var url = wmsSource.getGetFeatureInfoUrl(
                evt.coordinate, viewResolution, 'EPSG:3857',
                {'INFO_FORMAT': 'text/html'});
            if (url) {
              document.getElementById('info').innerHTML =
                  '<iframe seamless src="' + url + '"></iframe>';
            }
          });

The thing is, this pulls in ALL of the metadata and I would like to restrict it to just one or two fields, such as LEX, LEX_RCS_D or MAX_TIME_D (see field names here)

I'm not a user of JavaScript, so I'm having difficulties modifying the code.

After some research online, I came across the propertyName parameter, which I've tried implementing, although I'm not even sure this is what I'm looking for.

{'INFO_FORMAT': 'text/html'}, {propertyName: 'LEX'}

Given the way the BGS WMS is configured, is it even possible to limit the attributes which are pulled out on the GetFeatureInfo request?

Answer 1

Given the way the BGS WMS is configured, is it even possible to limit the attributes which are pulled out on the GetFeatureInfo request?

No.

The propertyName parameter you have come across is a vendor specific option provided by GeoServer for WMS, but this BGS service is not a GeoServer service; so you will not be able to use propertyName to limit the attributes retrieved from a GetFeatureInfo request.