Allow geometries to extend a bit more past their prospective parents (#…

…32)
City-of-Helsinki · May 8, 2020 · d5157bc · d5157bc
1 parent 47a6d80
commit d5157bc
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/munigeo/importer/helsinki.py b/munigeo/importer/helsinki.py
@@ -127,7 +127,12 @@ def _import_division(self, muni, div, type_obj, syncher, parent_dict, feat):
                     if not geom.intersects(parent_geom):
                         continue
                     area = (geom - parent.geometry.boundary).area
-                    if area > 1e-6:
+                    # We allow a bit of extension (300 m^2) outside the parent
+                    # as subdivision geometry boundaries don't always match perfectly
+                    # with their parents.
+                    # 300m^2 is a bit more than the largest error in current
+                    # data (254m^2)
+                    if area > 300:
                         continue
                     parents.append(parent)
                 parents = sorted(parents)