Consider landable points only

ogn/collect/logbook.py

@@ -103,7 +103,8 @@ def compute_takeoff_and_landing():
         sq2.c.device_id,
         Airport.id) \
         .filter(and_(func.ST_DFullyWithin(sq2.c.location, Airport.location_wkt, airport_radius),
-                     between(sq2.c.altitude, Airport.altitude-airport_delta, Airport.altitude+airport_delta)))
+                     between(sq2.c.altitude, Airport.altitude-airport_delta, Airport.altitude+airport_delta))) \
+        .filter(between(Airport.style, 2, 5))
 
     # ... and save them
     ins = insert(TakeoffLanding).from_select((TakeoffLanding.timestamp,