def test_radius_for_multipolygon(self):
"""
Test case for a rectangle.
"""
multipolygon = Location.objects.get(pk=8)
actual = shapes.calculate_multipoly_radius_km(multipolygon.geom)
point = shapes.reverse_coordinate_order(multipolygon.geom.centroid)
expected = vincenty(point, (20, 50)).kilometers
self.assertEqual(actual, expected)
def radius_km(self):
"""
If the Location is a Circle, Rectangle, Polygon, or Multipolygon,
returns the distance in kilometers between the geometry's centroid and
the point on the geometry farthest from the centroid. Otherwise returns
None.
"""
if self.shape is 'Circle':
return units.meters_to_km(self.buffer_m)
elif self.shape is 'Rectangle' or self.shape is 'Polygon':
return shapes.calculate_polygon_radius_km(self.geom)
elif self.shape is 'MultiPolygon':
return shapes.calculate_multipoly_radius_km(self.geom)
else:
return None