From a1bc4bc33ea6770f3d5ace56592535e2a9eccfa6 Mon Sep 17 00:00:00 2001
From: Peter Yefi <peteryefi@gmail.com>
Date: Wed, 29 Mar 2023 18:22:23 -0400
Subject: [PATCH] Filtering out buildings with floor area less that 25 square
 meters

---
 hub/city_model_structure/city.py       | 2 +-
 hub/imports/geometry/geojson.py        | 4 +++-
 hub/unittests/test_geometry_factory.py | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/hub/city_model_structure/city.py b/hub/city_model_structure/city.py
index d157364f..987a47e1 100644
--- a/hub/city_model_structure/city.py
+++ b/hub/city_model_structure/city.py
@@ -41,7 +41,7 @@ class City:
     self._name = None
     self._lower_corner = lower_corner
     self._upper_corner = upper_corner
-    self._buildings = None
+    self._buildings = []
     self._srs_name = srs_name
     self._location = None
     self._country_code = None
diff --git a/hub/imports/geometry/geojson.py b/hub/imports/geometry/geojson.py
index 029966c8..41e6eac2 100644
--- a/hub/imports/geometry/geojson.py
+++ b/hub/imports/geometry/geojson.py
@@ -230,7 +230,9 @@ class Geojson:
 
       self._city = City([self._min_x, self._min_y, 0.0], [self._max_x, self._max_y, self._max_z], 'epsg:26911')
       for building in buildings:
-        self._city.add_city_object(building)
+        # Do not include "small building-like structures" to buildings
+        if building.floor_area >= 25:
+          self._city.add_city_object(building)
       self._city.level_of_detail.geometry = lod
       if lod == 1:
         lines_information = GeometryHelper.city_mapping(self._city, plot=False)
diff --git a/hub/unittests/test_geometry_factory.py b/hub/unittests/test_geometry_factory.py
index 457a0e32..42be913b 100644
--- a/hub/unittests/test_geometry_factory.py
+++ b/hub/unittests/test_geometry_factory.py
@@ -141,7 +141,8 @@ class TestGeometryFactory(TestCase):
                            year_of_construction_field='ANNEE_CONS',
                            function_field='CODE_UTILI',
                            function_to_hub=MontrealFunctionToHubFunction().dictionary).city
-    self.assertEqual(2356, len(city.buildings), 'wrong number of buildings')
+    # include 25 square meter condition for a building reduces buildings number from 2289 to 2057
+    self.assertEqual(2057, len(city.buildings), 'wrong number of buildings')
 
   def test_map_neighbours(self):
     """