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Add docstring

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This commit is contained in:
Chris Hill-Scott
2021-03-19 15:40:44 +00:00
parent a74db6eaa7
commit 57aa994ce9
1 changed files with 6 additions and 0 deletions
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6
app/broadcast_areas/__init__.py
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@@ -80,6 +80,12 @@ class BroadcastArea(SortableMixin):
@property
def estimated_bleed_in_m(self):
'''
Estimates the amount of bleed based on the population of an
area. Higher density areas tend to have short range masts, so
the bleed is low (down to 500m). Lower density areas have longer
range masts, so the typical bleed will be high (up to 5,000m).
'''
if self.phone_density < 1:
return Polygons.approx_bleed_in_degrees * Polygons.approx_metres_to_degree
estimated_bleed = 5_900 - (math.log(self.phone_density, 10) * 1_250)