From 22164114948766623640f52469d91a45f1a57698 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Laura=20Kl=C3=BCnder?= <laura@codingcatgirl.de>
Date: Sun, 19 Nov 2017 23:27:41 +0100
Subject: [PATCH] we should get the unary union from the other
 geometrychangestracker

---
 src/c3nav/mapdata/cache.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/c3nav/mapdata/cache.py b/src/c3nav/mapdata/cache.py
index 43b887b1..99931f8b 100644
--- a/src/c3nav/mapdata/cache.py
+++ b/src/c3nav/mapdata/cache.py
@@ -359,7 +359,7 @@ class GeometryChangeTracker:
         self.finalize()
         other.finalize()
         for level_id in other._geometries_by_level.keys():
-            self._geometries_by_level.setdefault(level_id, []).append(self._get_unary_union(level_id))
+            self._geometries_by_level.setdefault(level_id, []).append(other._get_unary_union(level_id))
         self._unary_unions = {}
 
     def save(self, last_update, new_update):