fix raster crs fallback in exclusion container (#500)

* fix raster crs fallback in exclusion container

* add release notes and improve error message

Author: coroa

RELEASE_NOTES.rst

@@ -21,7 +21,13 @@ Upcoming Release
 * Add ``aggregate_time={"sum", "mean", None}`` to ``convert_and_aggregate`` for temporal 
   aggregation with and without spatial aggregation, and deprecate ``capacity_factor``/``capacity_factor_timeseries`` 
   in favor of it
-   
+
+**Bug fixes**
+
+* Fix regression when ``ExclusionContainer`` encounters a raster with an invalid CRS
+  (https://github.com/PyPSA/atlite/pull/500).
+
+
 `v0.5.0 <https://github.com/PyPSA/atlite/releases/tag/v0.5.0>`__ (13th March 2026)
 =======================================================================================   
 

atlite/gis.py

@@ -479,11 +479,14 @@ def open_files(self):
                 assert isinstance(raster, rio.DatasetReader)
 
             # Check if the raster has a valid CRS
-            if not raster.crs:
+            if not (raster.crs.is_geographic or raster.crs.is_projected):
                 if d["crs"]:
                     raster._crs = CRS(d["crs"])
                 else:
-                    raise ValueError(f"CRS of {raster} is invalid, please provide it.")
+                    raise ValueError(
+                        f"CRS of {raster} is neither geographic nor projected, "
+                        f"please provide it manually:\n{raster.crs}"
+                    )
             d["raster"] = raster
 
         for d in self.geometries: