From d41b99dba886d4b5974dde2f5dadf17647b659ff Mon Sep 17 00:00:00 2001
From: Kaalleen <36401965+kaalleen@users.noreply.github.com>
Date: Fri, 9 May 2025 20:25:08 +0200
Subject: handle GeometryCollections in ensure_polygon (#3708)

---
 lib/utils/geometry.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/utils/geometry.py b/lib/utils/geometry.py
index 568f883d..39bbd963 100644
--- a/lib/utils/geometry.py
+++ b/lib/utils/geometry.py
@@ -180,10 +180,12 @@ def ensure_multi_point(thing):
 
 
 def ensure_polygon(thing):
-    """Given a Polygon or a MultiPolygon
+    """Given a Polygon, a MultiPolygon or a GeometryCollection
 
    Returns the Polygon or the biggest Polygon of the MultiPolygon"""
 
+    if thing.geom_type == "GeometryCollection":
+        thing = ensure_multi_polygon(thing)
     if thing.geom_type == "MultiPolygon":
         thing = list(thing.geoms)
         thing.sort(key=lambda thing: thing.area, reverse=True)
-- 
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