diff --git a/backend/open_data_connector.py b/backend/open_data_connector.py
index ca4975d..1021d8a 100644
--- a/backend/open_data_connector.py
+++ b/backend/open_data_connector.py
@@ -264,7 +264,7 @@ def import_from_source(source_cfg: dict, config_dir: Path) -> dict:
             lat = float(_as_text(lat_raw) or _as_text(defaults.get("lat", "")))
             lon = float(_as_text(lon_raw) or _as_text(defaults.get("lon", "")))
             if coord_crs == "EPSG:25832":
-                lat, lon = _utm_epsg25832_to_wgs84(lat, lon)
+                lat, lon = _utm_epsg25832_to_wgs84(lon, lat)
 
             start_dt = _as_text(_get_by_path(record, start_key)) or _as_text(defaults.get("start_datetime", ""))
             end_dt = _as_text(_get_by_path(record, end_key)) or _as_text(defaults.get("end_datetime", ""))
diff --git a/docs/open_data_sources_nrw_live.json b/docs/open_data_sources_nrw_live.json
index 5a454d7..d6ece13 100644
--- a/docs/open_data_sources_nrw_live.json
+++ b/docs/open_data_sources_nrw_live.json
@@ -8,12 +8,12 @@
       "json_path": "features",
       "source_name": "koeln_verkehrsbeeintraechtigungen",
       "field_map": {
-        "external_id": "attributes.OBJECTID",
+        "external_id": "attributes.objectid",
         "lat": "geometry.y",
         "lon": "geometry.x",
-        "event_type": "attributes.TYP",
-        "start_datetime": "attributes.DATUM_VON",
-        "end_datetime": "attributes.DATUM_BIS"
+        "event_type": "attributes.typ",
+        "start_datetime": "attributes.datum_von",
+        "end_datetime": "attributes.datum_bis"
       },
       "event_type_map": {
         "1": "event",