let's not crash if there are nodes outside of altitude areas

src/c3nav/routing/router.py

@@ -1,4 +1,5 @@
 import json
+import logging
 import operator
 import os
 import pickle
@@ -24,6 +25,8 @@ from c3nav.mapdata.utils.locations import CustomLocation
 from c3nav.routing.exceptions import LocationUnreachable, NoRouteFound, NotYetRoutable
 from c3nav.routing.route import Route
 
+logger = logging.getLogger('c3nav')
+
 
 class Router:
     filename = os.path.join(settings.CACHE_ROOT, 'router')
@@ -138,6 +141,17 @@ class Router:
 
                         space.altitudeareas.append(area)
 
+                for node in space_nodes:
+                    if node.altitude is not None:
+                        continue
+                    logger.warning('Node %d in space %d is not inside an altitude area' % (node.pk, space.pk))
+                    node_altitudearea = min(space.altitudeareas, key=lambda a: a.distance(node.point), default=None)
+                    if node_altitudearea:
+                        node.altitude = node_altitudearea.get_altitude(node)
+                    else:
+                        node.altitude = float(level.base_altitude)
+                        logger.info('Space %d has no altitude areas' % space.pk)
+
                 for area in space.altitudeareas:
                     # create fallback nodes
                     if not area.nodes and space_nodes: