pySphericalPolygon

Perform point in polygon operations

Install

pip install pySphericalPolygon

Usage

import pySphericalPolygon as pysp

Create a spherical polygon with vertices [[tetah_1,phi_1],[tetah_2,phi_2]...].

For geographical purpuses tetha is latitude and phi is longtitude.

sp = pysp.SpericalPolygon([[0,0],
                         [80,30],
                         [10,60]])

Check if a point is inside

print sp.contains_points([[30,30]])
[ True]

Check many points at once

print sp.contains_points([[30,30],[-30,30],[-90,40]])
[ True False False]

Both vertices and/or points may be specified in radians

print sp.contains_points([[0.52359878,0.52359878],[-0.52359878,0.52359878],[-1.57079633,0.6981317]],radians=True)
[ True False False]

Convention deafult is geographic:

(-π/2 rad) -90° ≤ tetha ≤ 90° (π/2 rad)

(-π rad) -180° ≤ phi ≤ 180° (π rad)

But mathematic convetion is supprted too:

(0 rad) 0° ≤ tetha ≤ 180° (π rad)

(0 rad) 0° ≤ phi ≤ 360° (2π rad)

sp = pysp.SpericalPolygon([[90,0],
                 [10,30],
                 [80,60]],convention='math')