diff --git a/hub/imports/geometry/geojson.py b/hub/imports/geometry/geojson.py
index 50c5583d..9105760b 100644
--- a/hub/imports/geometry/geojson.py
+++ b/hub/imports/geometry/geojson.py
@@ -133,8 +133,9 @@ class Geojson:
   @staticmethod
   def _find_wall(line_1, line_2):
     for i in range(0, 2):
+      j = 1 - i
       point_1 = line_1[i]
-      point_2 = line_2[i]
+      point_2 = line_2[j]
       distance = GeometryHelper.distance_between_points(point_1, point_2)
       if distance > 1e-2:
         return False
@@ -143,6 +144,8 @@ class Geojson:
   def _store_shared_percentage_to_walls(self, city, city_mapped):
     for building in city.buildings:
       if building.name not in city_mapped.keys():
+        for wall in building.walls:
+          wall.percentage_shared = 0
         continue
       building_mapped = city_mapped[building.name]
       for wall in building.walls:
@@ -151,12 +154,8 @@ class Geojson:
         for point in wall.perimeter_polygon.coordinates:
           if point[2] < 0.5:
             ground_line.append(point)
-        # todo: erase when we have no triangulation
-        if len(ground_line) < 2:
-          continue
-        # todo: erase down to here
         for entry in building_mapped:
-          if building_mapped[entry]['shared_points'] <= 5:
+          if building_mapped[entry]['shared_points'] <= 3:
             continue
           line = [building_mapped[entry]['line_start'], building_mapped[entry]['line_end']]
           neighbour_line = [building_mapped[entry]['neighbour_line_start'],