More robust spatial mapping handling

ckanext/odsh/validation.py

@@ -224,18 +224,22 @@ def known_spatial_uri(key, data, errors, context):
     not_found = True
     spatial_text = str()
     spatial = str()
+
+    try:
         with open(mapping_path, newline='') as mapping_file:
             cr = csv.reader(mapping_file, delimiter="\t")
             for row in cr:
-        if row[0] == value:
+                if row and len(row) > 2 and row[0] == value:
                     not_found = False
                     spatial_text = row[1]
                     loaded = json.loads(row[2])
-            spatial = json.dumps(loaded['geometry'])
+                    spatial = json.dumps(loaded.get('geometry', {}))
                     break
             if not_found:
-        raise toolkit.Invalid(
-            'spatial_uri: uri unknown')
+                raise toolkit.Invalid('spatial_uri: uri unknown')
+    except (IOError, json.decoder.JSONDecodeError, KeyError) as e:
+        log.error(f"Error processing spatial mapping: {e}")
+        raise toolkit.Invalid("Error processing spatial mapping")
 
     new_index = next_extra_index(data)