diff --git a/src/c3nav/editor/forms.py b/src/c3nav/editor/forms.py
index 0e90d2ec..1a69cc3b 100644
--- a/src/c3nav/editor/forms.py
+++ b/src/c3nav/editor/forms.py
@@ -80,6 +80,6 @@ def create_editor_form(mapitemtype):
 
 
 def create_editor_forms():
-    from c3nav.mapdata.models.base import FEATURE_TYPES
-    for mapitemtype in FEATURE_TYPES.values():
+    from c3nav.mapdata.models.base import EDITOR_FORM_MODELS
+    for mapitemtype in EDITOR_FORM_MODELS.values():
         create_editor_form(mapitemtype)
diff --git a/src/c3nav/editor/views.py b/src/c3nav/editor/views.py
index 8ea86704..da0ebe27 100644
--- a/src/c3nav/editor/views.py
+++ b/src/c3nav/editor/views.py
@@ -5,7 +5,7 @@ from django.shortcuts import get_object_or_404, redirect, render
 
 from c3nav.access.apply import can_access, filter_queryset_by_access
 from c3nav.mapdata.models import AreaLocation, Section
-from c3nav.mapdata.models.base import FEATURE_TYPES
+from c3nav.mapdata.models.base import EDITOR_FORM_MODELS
 
 
 def list_mapitemtypes(request, section):
@@ -25,13 +25,13 @@ def list_mapitemtypes(request, section):
                 'title': mapitemtype._meta.verbose_name_plural,
                 'has_section': hasattr(mapitemtype, 'section'),
                 'count': get_item_count(mapitemtype),
-            } for name, mapitemtype in FEATURE_TYPES.items()
+            } for name, mapitemtype in EDITOR_FORM_MODELS.items()
         ],
     })
 
 
 def list_mapitems(request, mapitem_type, section=None):
-    mapitemtype = FEATURE_TYPES.get(mapitem_type)
+    mapitemtype = EDITOR_FORM_MODELS.get(mapitem_type)
     if mapitemtype is None:
         raise Http404('Unknown mapitemtype.')
 
@@ -64,7 +64,7 @@ def list_mapitems(request, mapitem_type, section=None):
 
 
 def edit_mapitem(request, mapitem_type, name=None):
-    mapitemtype = FEATURE_TYPES.get(mapitem_type)
+    mapitemtype = EDITOR_FORM_MODELS.get(mapitem_type)
     if mapitemtype is None:
         raise Http404()
 
diff --git a/src/c3nav/mapdata/__init__.py b/src/c3nav/mapdata/__init__.py
index e69de29b..d441434e 100644
--- a/src/c3nav/mapdata/__init__.py
+++ b/src/c3nav/mapdata/__init__.py
@@ -0,0 +1 @@
+default_app_config = 'c3nav.mapdata.apps.MapdataConfig'
diff --git a/src/c3nav/mapdata/api.py b/src/c3nav/mapdata/api.py
index 5f110614..9bbe5543 100644
--- a/src/c3nav/mapdata/api.py
+++ b/src/c3nav/mapdata/api.py
@@ -11,7 +11,7 @@ from rest_framework.viewsets import ReadOnlyModelViewSet, ViewSet
 from c3nav.access.apply import filter_arealocations_by_access, filter_queryset_by_access
 from c3nav.mapdata.lastupdate import get_last_mapdata_update
 from c3nav.mapdata.models import AreaLocation, LocationGroup, Source
-from c3nav.mapdata.models.geometry.base import GEOMETRY_FEATURE_TYPES
+from c3nav.mapdata.models.geometry.base import GEOMETRY_MODELS
 from c3nav.mapdata.models.geometry.space import Stair
 from c3nav.mapdata.models.section import Section
 from c3nav.mapdata.search import get_location
@@ -30,7 +30,7 @@ class GeometryTypeViewSet(ViewSet):
                 ('name', name),
                 ('title', str(mapitemtype._meta.verbose_name)),
                 ('title_plural', str(mapitemtype._meta.verbose_name_plural)),
-            )) for name, mapitemtype in GEOMETRY_FEATURE_TYPES.items()
+            )) for name, mapitemtype in GEOMETRY_MODELS.items()
         ])
 
 
@@ -40,7 +40,7 @@ class GeometryViewSet(ViewSet):
     """
     def list(self, request):
         types = set(request.GET.getlist('type'))
-        valid_types = list(GEOMETRY_FEATURE_TYPES.keys())
+        valid_types = list(GEOMETRY_MODELS.keys())
         if not types:
             types = valid_types
         else:
@@ -60,7 +60,7 @@ class GeometryViewSet(ViewSet):
     def _list(self, request, types):
         results = []
         for t in types:
-            mapitemtype = GEOMETRY_FEATURE_TYPES[t]
+            mapitemtype = GEOMETRY_MODELS[t]
             queryset = mapitemtype.objects.all()
             queryset = filter_queryset_by_access(request, queryset)
             queryset = queryset.order_by('id')
diff --git a/src/c3nav/mapdata/apps.py b/src/c3nav/mapdata/apps.py
new file mode 100644
index 00000000..4cfe1648
--- /dev/null
+++ b/src/c3nav/mapdata/apps.py
@@ -0,0 +1,31 @@
+from django.apps import AppConfig
+from django.db import models
+
+
+class MapdataConfig(AppConfig):
+    name = 'c3nav.mapdata'
+
+    def _get_submodels(self, cls: type):
+        submodels = []
+        for subcls in cls.__subclasses__():
+            if issubclass(subcls, models.Model):
+                submodels.append(subcls)
+            submodels.extend(self._get_submodels(subcls))
+        return submodels
+
+    def ready(self):
+        from c3nav.mapdata.models.base import EditorFormMixin, EDITOR_FORM_MODELS
+        for cls in self._get_submodels(EditorFormMixin):
+            EDITOR_FORM_MODELS[cls.__name__] = cls
+
+        from c3nav.mapdata.models.geometry.base import GeometryMixin, GEOMETRY_MODELS
+        for cls in self._get_submodels(GeometryMixin):
+            GEOMETRY_MODELS[cls.__name__] = cls
+
+        from c3nav.mapdata.models.geometry.section import SectionGeometryMixin, SECTION_MODELS
+        for cls in self._get_submodels(SectionGeometryMixin):
+            SECTION_MODELS[cls.__name__] = cls
+
+        from c3nav.mapdata.models.geometry.space import SpaceGeometryMixin, SPACE_MODELS
+        for cls in self._get_submodels(SpaceGeometryMixin):
+            SPACE_MODELS[cls.__name__] = cls
diff --git a/src/c3nav/mapdata/models/__init__.py b/src/c3nav/mapdata/models/__init__.py
index 24a9e083..50a5e662 100644
--- a/src/c3nav/mapdata/models/__init__.py
+++ b/src/c3nav/mapdata/models/__init__.py
@@ -1,4 +1,5 @@
 from .section import Section  # noqa
 from .source import Source  # noqa
-from .geometry.section import Space  # noqa
+from c3nav.mapdata.models.geometry.section import Building, Space, Hole, Door   # noqa
+from c3nav.mapdata.models.geometry.space import StuffedArea, Stair, Obstacle, LineObstacle  # noqa
 from .locations import AreaLocation, LocationGroup  # noqa
diff --git a/src/c3nav/mapdata/models/base.py b/src/c3nav/mapdata/models/base.py
index a0277a88..e493f6da 100644
--- a/src/c3nav/mapdata/models/base.py
+++ b/src/c3nav/mapdata/models/base.py
@@ -2,10 +2,10 @@ from collections import OrderedDict
 
 from django.utils.translation import get_language
 
-FEATURE_TYPES = OrderedDict()
+EDITOR_FORM_MODELS = OrderedDict()
 
 
-class EditorFormMixin():
+class EditorFormMixin:
     EditorForm = None
 
     @property
diff --git a/src/c3nav/mapdata/models/geometry/__init__.py b/src/c3nav/mapdata/models/geometry/__init__.py
index 5f0f5075..e69de29b 100644
--- a/src/c3nav/mapdata/models/geometry/__init__.py
+++ b/src/c3nav/mapdata/models/geometry/__init__.py
@@ -1 +0,0 @@
-from c3nav.mapdata.models.geometry.section import Space  # noqa
diff --git a/src/c3nav/mapdata/models/geometry/base.py b/src/c3nav/mapdata/models/geometry/base.py
index 8c610104..061f843e 100644
--- a/src/c3nav/mapdata/models/geometry/base.py
+++ b/src/c3nav/mapdata/models/geometry/base.py
@@ -5,7 +5,7 @@ from shapely.geometry import Point, mapping
 from c3nav.mapdata.models.base import EditorFormMixin
 from c3nav.mapdata.utils.json import format_geojson
 
-GEOMETRY_FEATURE_TYPES = OrderedDict()
+GEOMETRY_MODELS = OrderedDict()
 
 
 class GeometryMixin(EditorFormMixin):
@@ -29,7 +29,7 @@ class GeometryMixin(EditorFormMixin):
         ))
 
     def get_shadow_geojson(self):
-        return None
+        pass
 
     def contains(self, x, y):
         return self.geometry.contains(Point(x, y))
diff --git a/src/c3nav/mapdata/models/geometry/section.py b/src/c3nav/mapdata/models/geometry/section.py
index f7e0bc62..cc25d14b 100644
--- a/src/c3nav/mapdata/models/geometry/section.py
+++ b/src/c3nav/mapdata/models/geometry/section.py
@@ -6,7 +6,7 @@ from django.utils.translation import ugettext_lazy as _
 from c3nav.mapdata.fields import GeometryField
 from c3nav.mapdata.models.geometry.base import GeometryMixin
 
-LEVEL_FEATURE_TYPES = OrderedDict()
+SECTION_MODELS = OrderedDict()
 
 
 class SectionGeometryMixin(GeometryMixin):
@@ -33,8 +33,6 @@ class Space(SectionGeometryMixin, models.Model):
     """
     An accessible space. Shouldn't overlap.
     """
-    section = models.ForeignKey('mapdata.Section', on_delete=models.CASCADE, verbose_name=_('section'))
-    geometry = GeometryField('polygon')
 
     CATEGORIES = (
         ('', _('normal')),
@@ -48,6 +46,8 @@ class Space(SectionGeometryMixin, models.Model):
         ('lowerr', _('lower')),
     )
 
+    section = models.ForeignKey('mapdata.Section', on_delete=models.CASCADE, verbose_name=_('section'))
+    geometry = GeometryField('polygon')
     public = models.BooleanField(verbose_name=_('public'), default=True)
     category = models.CharField(verbose_name=_('category'), choices=CATEGORIES, max_length=16)
     layer = models.CharField(verbose_name=_('layer'), choices=LAYERS, max_length=16)
diff --git a/src/c3nav/mapdata/models/geometry/space.py b/src/c3nav/mapdata/models/geometry/space.py
index 0c536843..e300ab32 100644
--- a/src/c3nav/mapdata/models/geometry/space.py
+++ b/src/c3nav/mapdata/models/geometry/space.py
@@ -8,7 +8,7 @@ from c3nav.mapdata.fields import GeometryField
 from c3nav.mapdata.models.geometry.base import GeometryMixin
 from c3nav.mapdata.utils.json import format_geojson
 
-SPACE_FEATURE_TYPES = OrderedDict()
+SPACE_MODELS = OrderedDict()
 
 
 class SpaceGeometryMixin(GeometryMixin):
@@ -105,5 +105,6 @@ class LineObstacle(SpaceGeometryMixin, models.Model):
 
     def get_geojson_properties(self):
         result = super().get_geojson_properties()
+        # noinspection PyTypeChecker
         result['width'] = float(self.width)
         return result