I'm trying to access the Sentinel Hub's WFS via PyQGIS. Here's my code:

base_url = 'https://services.sentinel-hub.com/ogc/wfs/<my_service_endpoint>?'
params = 'SRSNAME=EPSG:4326&TYPENAMES=DSS2&GEOMETRY=<some wkt polygon>'
layer = QgsVectorLayer(base_url + params, 'layername', 'wfs')

The resulting layer is valid but the requests fail with code 400 because PyQGIS converts EPSG:4326 to urn:ogc:def:crs:EPSG::4326 (OGC URN) as can be seen in the debugger window below:

enter image description here

The reason is, the Sentinel Hub WFS server doesn't understand OGC URNs, and expects a simple EPSG identifier e.g. ESPG:4326. Is there a way to prevent PyQGIS from performing this conversion?

QGIS version 3.22.1-Białowieża
QGIS code revision 663dcf8fb9
Qt version 5.12.8
Python version 3.8.10
GDAL/OGR version 3.0.4
PROJ version 6.3.1
EPSG Registry database version v9.8.6 (2020-01-22)
OS version Ubuntu 20.04.3 LTS

  • Similar topic: gis.stackexchange.com/questions/338082/…
    – Taras
    Commented Dec 14, 2021 at 11:12
  • Thanks, I've seen that one. But that answer doesn't solve this specific problem. Commented Dec 14, 2021 at 13:11
  • What CRS identifiers are returned by the version 2.0.0 GetCapabilities response for the service?
    – nmtoken
    Commented Jan 11, 2022 at 10:42
  • srsname is optional so what if you don't supply it? I also note that the coordinates in the geometry polygon, are not epsg::4326 coordinates, if they were they would have values of no greater than +/-180, so possibly you have some other issue
    – nmtoken
    Commented Jan 11, 2022 at 10:56
  • 2
    Note that according to the WFS 2.0.0 standard a server must support urns ~ Servers that implement this International Standard shall be able to process srsName attribute values using the following format model: urn:ogc:def:objectType:authority:version:<EPSG code> (see OGC 07-092r2)
    – nmtoken
    Commented Jan 12, 2022 at 10:28


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