UPDATE

location_data/openeo_service.py

@@ -411,8 +411,7 @@ def build_spatial_extent(cells: list[AnalysisGridCell]) -> dict[str, float]:
     south = None
     north = None
     for cell in cells:
-        coordinates = ((cell.geometry or {}).get("coordinates") or [[]])[0]
-        for lon, lat in coordinates:
+        for lon, lat in _iter_geometry_lon_lat_pairs(cell.geometry):
             west = lon if west is None else min(west, lon)
             east = lon if east is None else max(east, lon)
             south = lat if south is None else min(south, lat)
@@ -426,6 +425,27 @@ def build_spatial_extent(cells: list[AnalysisGridCell]) -> dict[str, float]:
     }
 
 
+def _iter_geometry_lon_lat_pairs(geometry: dict[str, Any] | None):
+    geometry = dict(geometry or {})
+    geometry_type = geometry.get("type")
+    coordinates = geometry.get("coordinates") or []
+
+    if geometry_type == "Polygon":
+        for ring in coordinates:
+            for point in ring or []:
+                if len(point) >= 2:
+                    yield point[0], point[1]
+        return
+
+    if geometry_type == "MultiPolygon":
+        for polygon in coordinates:
+            for ring in polygon or []:
+                for point in ring or []:
+                    if len(point) >= 2:
+                        yield point[0], point[1]
+        return
+
+
 def build_empty_metric_payload() -> dict[str, Any]:
     return {metric_name: None for metric_name in METRIC_NAMES}