convert lxd like dataset without map available

Author: MichaelSchuldes

omega_prime/converters/lxd.py

@@ -6,6 +6,7 @@
 import numpy as np
 from lxd_io import Dataset
 import polars as pl
+from warnings import warn
 
 vct = betterosi.MovingObjectVehicleClassificationType
 vehicles = {
@@ -125,4 +126,9 @@ def to_omega_prime_recording(self, recording) -> Recording:
         )
 
         xodr_path = recording.opendrive_map_file
-        return Recording(df=tracks, map=MapOdr.from_file(xodr_path), validate=False)
+        if xodr_path is not None:
+            map = MapOdr.from_file(xodr_path)
+        else:
+            map = None
+            warn(f"No map associated with recording {recording}")
+        return Recording(df=tracks, map=map, validate=False)

omega_prime/recording.py

@@ -752,7 +752,9 @@ def plot_altair(
                 *[
                     o
                     for o in [
-                        None if not plot_map else self.map.plot_altair(recording=self, plot_polys=plot_map_polys),
+                        None
+                        if not plot_map or self.map is None
+                        else self.map.plot_altair(recording=self, plot_polys=plot_map_polys),
                         alt.Chart(mv_dict)
                         .mark_geoshape()
                         .encode(