diff --git a/api/obs/api/routes/exports.py b/api/obs/api/routes/exports.py
index 4fa1ce3..c28154c 100644
--- a/api/obs/api/routes/exports.py
+++ b/api/obs/api/routes/exports.py
@@ -4,6 +4,7 @@ from contextlib import contextmanager
 import zipfile
 import io
 import re
+import math
 from sqlite3 import connect
 
 import shapefile
@@ -15,6 +16,9 @@ from sanic.exceptions import InvalidUsage
 from obs.api.app import api, json as json_response
 from obs.api.utils import use_request_semaphore
 
+import logging
+log = logging.getLogger(__name__)
+
 
 class ExportFormat(str, Enum):
     SHAPEFILE = "shapefile"
@@ -64,13 +68,13 @@ def shapefile_zip(shape_type=shapefile.POINT, basename="events"):
 async def export_events(req):
     async with use_request_semaphore(req, "export_semaphore", timeout=30):
         bbox = req.ctx.get_single_arg(
-            "bbox", default="-180,-90,180,90", convert=parse_bounding_box
+            "bbox", default="-180,-90,180,90"
         )
         fmt = req.ctx.get_single_arg("fmt", convert=ExportFormat)
 
-        events = await req.ctx.db.stream_scalars(
-            select(OvertakingEvent).where(
-                OvertakingEvent.geometry.bool_op("&&")(func.ST_Transform(bbox, 3857))
+        events = await req.ctx.db.stream(
+            text(
+                f"select ST_AsGeoJSON(ST_Transform(geometry,4326)) AS geometry,distance_overtaker,distance_stationary,way_id,direction,speed,time_stamp,course,zone from layer_obs_events(ST_Transform(ST_MakeEnvelope({bbox},4326),3857),19,NULL,'1900-01-01'::timestamp,'2100-01-01'::timestamp) "
             )
         )
 
@@ -82,16 +86,19 @@ async def export_events(req):
                 writer.field("direction", "N", decimal=0)
                 writer.field("course", "N", decimal=4)
                 writer.field("speed", "N", decimal=4)
+                writer.field("zone", "C")
 
                 async for event in events:
-                    writer.point(event.longitude, event.latitude)
+                    coords = json.loads(event.geometry)['coordinates']
+                    writer.point(*coords)
                     writer.record(
                         distance_overtaker=event.distance_overtaker,
                         distance_stationary=event.distance_stationary,
-                        direction=-1 if event.direction_reversed else 1,
+                        direction=event.direction,
                         way_id=event.way_id,
                         course=event.course,
                         speed=event.speed,
+                        zone=event.zone
                         # "time"=event.time,
                     )
 
@@ -100,19 +107,22 @@ async def export_events(req):
         if fmt == ExportFormat.GEOJSON:
             features = []
             async for event in events:
+                geom = json.loads(event.geometry)
                 features.append(
                     {
                         "type": "Feature",
-                        "geometry": json.loads(event.geometry),
+                        "geometry": geom,
                         "properties": {
-                            "distance_overtaker": event.distance_overtaker,
-                            "distance_stationary": event.distance_stationary,
-                            "direction": -1 if event.direction_reversed else 1,
+                            "distance_overtaker": event.distance_overtaker if event.distance_overtaker is not None and not math.isnan(event.distance_overtaker) else None,
+                            "distance_stationary": event.distance_stationary if event.distance_stationary is not None and not math.isnan(event.distance_stationary) else None,
+                            "direction": event.direction if event.direction is not None and not math.isnan(event.direction) else None,
                             "way_id": event.way_id,
-                            "course": event.course,
-                            "speed": event.speed,
-                            "time": event.time,
+                            "course": event.course if event.course is not None and not math.isnan(event.course) else None,
+                            "speed": event.speed if event.speed is not None and not math.isnan(event.speed) else None,
+                            "time": event.time_stamp,
+                            "zone": event.zone
                         },
+
                     }
                 )
 
diff --git a/tile-generator/layers/obs_events/layer.sql b/tile-generator/layers/obs_events/layer.sql
index 99e81e2..85effdb 100644
--- a/tile-generator/layers/obs_events/layer.sql
+++ b/tile-generator/layers/obs_events/layer.sql
@@ -1,5 +1,7 @@
+DROP FUNCTION IF EXISTS layer_obs_events;
+
 CREATE OR REPLACE FUNCTION layer_obs_events(bbox geometry, zoom_level int, user_id integer, min_time timestamp, max_time timestamp)
-RETURNS TABLE(event_id bigint, geometry geometry, distance_overtaker float, distance_stationary float, direction int, course float, speed float, zone zone_type, way_id bigint) AS $$
+RETURNS TABLE(event_id bigint, geometry geometry, distance_overtaker float, distance_stationary float, direction int, course float, speed float, time_stamp timestamp, zone zone_type, way_id bigint) AS $$
 
     SELECT
       overtaking_event.id::bigint as event_id,
@@ -9,6 +11,7 @@ RETURNS TABLE(event_id bigint, geometry geometry, distance_overtaker float, dist
       (case when direction_reversed then -1 else 1 end)::int as direction,
       course,
       speed,
+      time as time_stamp,
       CASE WHEN road.zone IS NULL THEN 'urban' else road.zone END as zone,
       overtaking_event.way_id::bigint as way_id
     FROM overtaking_event
diff --git a/tile-generator/layers/obs_events/obs_events.yaml b/tile-generator/layers/obs_events/obs_events.yaml
index 9cfb2f2..4c43dcb 100644
--- a/tile-generator/layers/obs_events/obs_events.yaml
+++ b/tile-generator/layers/obs_events/obs_events.yaml
@@ -16,6 +16,8 @@ layer:
       Direction of travel, as reported by GPS, in degree from North.
     speed: |
       Speed of travel, as reported by GPS, in meters per second (?).
+    time_stamp: |
+      the time of the overtaking
     zone: |
       rural or urban
   defaults: