Don't set crs attribute

xvec/accessor.py

@@ -377,8 +377,6 @@ def to_crs(
         _obj = _obj.drop_indexes(variable_crs_solved.keys())
 
         for key, crs in variable_crs_solved.items():
-            if crs:
-                _obj[key].attrs["crs"] = CRS.from_user_input(crs)
             _obj = _obj.set_xindex([key], GeometryIndex, crs=crs)
 
         return _obj
@@ -507,8 +505,6 @@ def set_crs(
         _obj = _obj.drop_indexes(variable_crs_solved.keys())
 
         for key, crs in variable_crs_solved.items():
-            if crs:
-                _obj[key].attrs["crs"] = CRS.from_user_input(crs)
             _obj = _obj.set_xindex([key], GeometryIndex, crs=crs)
 
         return _obj
@@ -698,12 +694,19 @@ def set_geom_indexes(
         _obj = _obj.drop_indexes(coord_names)
 
         for coord in coord_names:
-            if crs:
-                _obj[coord].attrs["crs"] = CRS.from_user_input(crs)
             _obj = _obj.set_xindex(coord, GeometryIndex, crs=crs, **kwargs)
 
         return _obj
 
+    def _get_crs(self, name) -> CRS | None:
+        if name in self._geom_indexes:
+            crs = self._obj.xindexes[name].crs
+        elif name in self._geom_coords_all:
+            crs = self._obj[name].attrs.get("crs", None)
+        else:
+            crs = None
+        return crs
+
     def to_geopandas(self) -> GeoDataFrame | pd.DataFrame:
         """Convert this array into a GeoPandas :class:`~geopandas.GeoDataFrame`
 
@@ -777,13 +780,13 @@ def to_geopandas(self) -> GeoDataFrame | pd.DataFrame:
         # ensure CRS of all columns is preserved
         for c in gdf.columns:
             if c in self._geom_coords_all:
-                gdf[c] = gpd.GeoSeries(gdf[c], crs=self._obj[c].attrs.get("crs", None))
+                gdf[c] = gpd.GeoSeries(gdf[c], crs=self._get_crs(c))
 
         # if geometry is an index, reset and assign as active
         index_name = gdf.index.name
-        if index_name in self._geom_coords_all:
+        if index_name in self._geom_indexes:
             return gdf.reset_index().set_geometry(
-                index_name, crs=self._obj[index_name].attrs.get("crs", None)
+                index_name, crs=self._get_crs(index_name)
             )  # type: ignore
 
         warnings.warn(
@@ -896,12 +899,10 @@ def to_geodataframe(
         # ensure CRS of all columns is preserved
         for c in df.columns:
             if c in self._geom_coords_all:
-                df[c] = gpd.GeoSeries(df[c], crs=self._obj[c].attrs.get("crs", None))
+                df[c] = gpd.GeoSeries(df[c], crs=self._get_crs(c))
 
         if geometry is not None:
-            return df.set_geometry(
-                geometry, crs=self._obj[geometry].attrs.get("crs", None)
-            )  # type: ignore
+            return df.set_geometry(geometry, crs=self._get_crs(geometry))  # type: ignore
 
         warnings.warn(
             "No active geometry column to be set. The resulting object "

xvec/tests/conftest.py

@@ -36,7 +36,6 @@ def geom_dataset(geom_dataset_no_index):
     # a dataset with a geometry coordinate baked by a GeometryIndex
     crs = CRS.from_user_input(26915)
     ds = geom_dataset_no_index.copy()
-    ds["geom"].attrs["crs"] = crs
     return ds.set_xindex("geom", GeometryIndex, crs=crs)
 
 
@@ -53,7 +52,6 @@ def first_geom_dataset(geom_dataset, geom_array):
         .drop_indexes("geom")
         .set_xindex("geom", GeometryIndex, crs=geom_dataset.xindexes["geom"].crs)
     )
-    fg["geom"].attrs["crs"] = CRS.from_user_input(26915)
     return fg
 
 
@@ -80,8 +78,6 @@ def multi_geom_dataset(geom_array, geom_array_z):
         .set_xindex("geom", GeometryIndex, crs=26915)
         .set_xindex("geom_z", GeometryIndex, crs=26915)
     )
-    ds["geom"].attrs["crs"] = ds.xindexes["geom"].crs
-    ds["geom_z"].attrs["crs"] = ds.xindexes["geom_z"].crs
     return ds
 
 
@@ -98,8 +94,6 @@ def multi_geom_multi_crs_dataset(geom_array, geom_array_z):
         .set_xindex("geom", GeometryIndex, crs=26915)
         .set_xindex("geom_z", GeometryIndex, crs="EPSG:4362")
     )
-    ds["geom"].attrs["crs"] = ds.xindexes["geom"].crs
-    ds["geom_z"].attrs["crs"] = ds.xindexes["geom_z"].crs
     return ds
 
 
@@ -117,8 +111,6 @@ def multi_geom_no_index_dataset(geom_array, geom_array_z):
         .set_xindex("geom", GeometryIndex, crs=26915)
         .set_xindex("geom_z", GeometryIndex, crs=26915)
     )
-    ds["geom"].attrs["crs"] = ds.xindexes["geom"].crs
-    ds["geom_z"].attrs["crs"] = ds.xindexes["geom_z"].crs
     return ds