From 4c7c667bdb378d15dfb2d491bd54abd20bc3e60b Mon Sep 17 00:00:00 2001
From: mpeltriaux <Michel_Peltriaux@web.de>
Date: Sun, 13 Sep 2026 11:36:28 +0200
Subject: [PATCH] # Error fetching

* adds proper fetching of GDAL Exceptions in case of further problems in the future
---
 konova/utils/schneider/fetcher.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/konova/utils/schneider/fetcher.py b/konova/utils/schneider/fetcher.py
index 2fa79cb9..14718495 100644
--- a/konova/utils/schneider/fetcher.py
+++ b/konova/utils/schneider/fetcher.py
@@ -9,6 +9,7 @@ import json
 from json import JSONDecodeError
 
 import requests
+from django.contrib.gis import gdal
 
 from konova.sub_settings import schneider_settings
 from konova.sub_settings.lanis_settings import DEFAULT_SRID
@@ -35,7 +36,10 @@ class ParcelFetcher:
         if geom.area < buffer_threshold:
             # Fallback for malicious geometries which are way too small and would disappear on negative buffering
             geom = geometry.geom
-        geom.transform(DEFAULT_SRID)
+        try:
+            geom.transform(DEFAULT_SRID)
+        except gdal.GDALException as e:
+            raise ValueError(f"{str(e)}\nCould not transform geometry (id: {geometry.id}) to {DEFAULT_SRID}:\n {geom.geojson}")
         self.geojson = geom.ewkt
         self.results = []