CODEWITHSUNDEEP
pythonjsonlatitude-longitudeshapely
dsuma
dsuma

Reputation: 1010

How to tell if point is in a predefined borders

I have a list of coordinates like so:

  [
     -79.763635,
     42.257327
  ],
  [
     -73.343723,
     45.046138
  ],
  [
     -74.006183,
     40.704002
  ],
  [
     -79.763635,
     42.257327
  ]

I want to see if a point SomeLat, SomeLong is inside these predefined borders.

I trie used shapely.geometry but the json has to be configured a certain way for it to create a shape(I cannot change that json).

What would be the best way to tell if a point I provide is inside those defined borders

Upvotes: 0

Views: 910

Answers (2)

Muhamed Al Khalil
Muhamed Al Khalil

Reputation: 347

I am not sure if this the best way, but this is how I would go about it. I would identify all the points making up the borders of the polygon, which is obtainable from the data you have. Then I would pull together every two border extreme latitude coordinates that share the same longitude coordinate. The final set should be a list of longitude coordinates and their corresponding latitude ranges, which you could loop through to decide if a point is in the polygon.

Upvotes: 0

Maurice Meyer
Maurice Meyer

Reputation: 18106

You can pass a list of lists/tuples to shapely:

>>> from shapely.geometry import Point, Polygon
>>> bbox = [ (0, 0), (0,2), (2,2), (2,0)]
>>> poly = Polygon(bbox)
>>> point = Point(1, 1)
>>> poly.contains(point)
True

Upvotes: 3

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