# OGR Error: Unsupported SRS **URL:** \ **Category:** Python\ **Tags:** wradlib\ **Created:** [July 4, 2023, 4:56am UTC](https://openradar.discourse.group/t/ogr-error-unsupported-srs/260 "2023-07-04T04:56:47Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![alan-weatherradar](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/alan-weatherradar/32/180_2.png) [@alan-weatherradar](https://openradar.discourse.group/u/alan-weatherradar)\ **Post date:** [July 4, 2023, 4:56am UTC](https://openradar.discourse.group/t/ogr-error-unsupported-srs/260/1 "2023-07-04T04:56:47Z")
Hi ## I have just installed wradlib (using conda on a fedora 38 wkstation) and now running the ppi\_example notebook and get the following error: RuntimeError Traceback (most recent call last) Cell In[5], line 1 ----\> 1 ax, pm = wradlib.vis.plot\_ppi(img) 2 txt = pl.title(“Simple PPI”) File ~/anaconda3/envs/wradlib/lib/python3.11/site-packages/wradlib/vis.py:473, in plot\_ppi(data, r, az, elev, site, proj, fig, ax, func, rf, \*\*kwargs) 459 elev = np.ones\_like(az) \* elev 461 da = georef.create\_xarray\_dataarray( 462 data, 463 r=r, (…) 470 \*\*kw\_spherical, 471 ) → 473 da = georef.georeference\_dataset(da, proj=proj) 475 if util.has\_import(osr): 476 # fallback to proj=None for GDAL OSR 477 if isinstance(proj, osr.SpatialReference): File ~/anaconda3/envs/wradlib/lib/python3.11/site-packages/wradlib/georef/xarray.py:194, in georeference\_dataset(obj, \*\*kwargs) 189 xyz, dst\_proj = polar.spherical\_to\_xyz( 190 r, az, obj[“elevation”], site, re=re, ke=ke, squeeze=True 191 ) 192 # proj, convert to aeqd and add offset 193 else: → 194 xyz, dst\_proj = polar.spherical\_to\_xyz( 195 r, az, obj[“elevation”], site, re=re, ke=ke, squeeze=True 196 ) 197 xyz += np.array(site).T 199 # calculate center point 200 # use first range bins File ~/anaconda3/envs/wradlib/lib/python3.11/site-packages/wradlib/georef/polar.py:106, in spherical\_to\_xyz(r, phi, theta, sitecoords, re, ke, squeeze, strict\_dims) 104 osr = import\_optional(“osgeo.osr”) 105 if has\_import(osr): → 106 rad = projection.proj4\_to\_osr(projstr) 107 else: 108 rad = projstr File ~/anaconda3/envs/wradlib/lib/python3.11/site-packages/wradlib/georef/projection.py:206, in proj4\_to\_osr(proj4str) 204 proj = osr.SpatialReference() 205 proj.ImportFromProj4(proj4str) → 206 proj.AutoIdentifyEPSG() 208 if proj.Validate() == ogr.OGRERR\_CORRUPT\_DATA: 209 raise ValueError( 210 “proj4str validates to ‘ogr.OGRERR\_CORRUPT\_DATA’” 211 “and can’t be imported as OSR object” 212 ) File ~/anaconda3/envs/wradlib/lib/python3.11/site-packages/osgeo/osr.py:616, in SpatialReference.AutoIdentifyEPSG(self, \*args) 614 def AutoIdentifyEPSG(self, \*args): 615 r"““AutoIdentifyEPSG(SpatialReference self) → OGRErr””" → 616 return \_osr.SpatialReference\_AutoIdentifyEPSG(self, \*args) RuntimeError: OGR Error: Unsupported SRS Any ideas on what is going on? Many thanks Alan Seed ---
**Author:** ![kmuehlbauer](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/kmuehlbauer/32/439_2.png) [@kmuehlbauer](https://openradar.discourse.group/u/kmuehlbauer)\ **Post date:** [July 4, 2023, 6:53pm UTC](https://openradar.discourse.group/t/ogr-error-unsupported-srs/260/2 "2023-07-04T18:53:57Z")
@alan-weatherradar Please install GDAL \< 3.7 to make this work. There have been some changes which lead to this behaviour. Still investigating what causes this. ---
**Author:** ![alan-weatherradar](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/alan-weatherradar/32/180_2.png) [@alan-weatherradar](https://openradar.discourse.group/u/alan-weatherradar)\ **Post date:** [July 4, 2023, 10:31pm UTC](https://openradar.discourse.group/t/ogr-error-unsupported-srs/260/3 "2023-07-04T22:31:16Z")
Many thanks Kai, much appreciated, Alan ---
**Author:** ![kmuehlbauer](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/kmuehlbauer/32/439_2.png) [@kmuehlbauer](https://openradar.discourse.group/u/kmuehlbauer)\ **Post date:** [July 6, 2023, 9:24am UTC](https://openradar.discourse.group/t/ogr-error-unsupported-srs/260/4 "2023-07-06T09:24:54Z")
@alan-weatherradar Alan, you’re very welcome. I’ll add this issue [Beam Blockage Calculation Example - RuntimeError: OGR Error: Unsupported SRS · Issue #628 · wradlib/wradlib · GitHub](https://github.com/wradlib/wradlib/issues/628) here which tracks this special error. I did not find out which change in GDAL causes this behaviour, but the solution is obviously just to not use `AutoIdentifyEPSG()` in GDAL \>= 3.7.