I believe we can do it using ArcGIS and I want to know if it is also possible, to query objects in a WMS layer using QGIS 3, my research so far have been unsuccessful. The identification tool does not work, nor the one for consulting the attribute table.

  • 5
    Some WMS layers may be queried, others not, it depends on what the providers allows. – Erik Oct 8 at 11:54

There is no attribute table for a WMS layer available in a client (QGIS or ArcGIS). A query to a WMS layer is a query to the server providing the map (a GetFeatureInfo request) querying a point location (a pixel in the map image). If the layer is queryable the server sends back a response for the attributes at that point in the underlying data. Whether a layer is queryable in this way is discoverable from the GetCapabilities request to the service, through the queryable attribute on the layer.

Below layer is not queryable:

<Layer queryable="0" opaque="0" cascaded="0">
    <Title>GBR BGS 1:625k Bedrock Age</Title>
    <Abstract>GBR BGS 1:625k Bedrock Age</Abstract>

Below layer is queryable:

<Layer queryable="1" opaque="0" cascaded="0">
    <Title>GBR BGS 1:625k Bedrock Lithology</Title>
    <Abstract>GBR BGS 1:625k scale Bedrock Lithology</Abstract>
| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.