I want to add an ArcGIS feature layer to QGIS using PyQGIS, with a query.
If I just want to add the layer, I can use the following code. Though I would point out that the arcgisfeatureserver provider is not documented at https://qgis.org/pyqgis/master/core/QgsVectorLayer.html. The server is a public one so you should be able to easily replicate this:
uri = QgsDataSourceUri() uri.setParam('crs', 'EPSG:3857') uri.setParam('url', 'https://portal.spatial.nsw.gov.au/server/rest/services/NSW_Features_of_Interest_Category/MapServer/2') layer = QgsVectorLayer(uri.uri(), "Test Layer" , 'arcgisfeatureserver') if layer.isValid(): QgsProject.instance().addMapLayer(layer) else: print('Invalid layer: failed to add layer')
I now want to add a basic query to the PyQGIS code, to avoid retrieving all records - for example:
where classsubtype = 12
To query the server directly, you can modify the REST URL eg:
However, if I try to do this by modifying the url parameter in PyQGIS, I get an invalid layer:
Is it possible to use queries or filters on ArcGIS feature layers via PyQGIS?
I'd note that I also cannot see how to do querying or filtering of ArcGIS feature layers, even if I try to add them via the GUI - Add Layer->Add ArcGIS REST Server Layer...