I have connected my QGIS to the [Sao Paulo Hydropower potential MapServer](http://tps.geosur.info/arcgis/rest/services/maps/GeoSUR_SPHydropower/MapServer) with a WMTS connection using the following URL: http://tps.geosur.info/arcgis/rest/services/maps/GeoSUR_SPHydropower/MapServer/WMTS/1.0.0/WMTSCapabilities.xml [![Hydropower potential][1]][1] Visually this is great but how can I access the data source behind this specific layer: [Hydropower Potential MW (ID: 7)](http://tps.geosur.info/arcgis/rest/services/maps/GeoSUR_SPHydropower/MapServer/7)?. In other words, how can I click on a coloured line in QGIS to see what the potential value is?. I noticed there is a link to a [json](http://tps.geosur.info/arcgis/rest/services/maps/GeoSUR_SPHydropower/MapServer/7?f=pjson) version but not sure how to load this into QGIS (or if it is indeed the best method). [1]: https://i.sstatic.net/1FRa0.jpg