geo-utils 0.1

Miscellaneous geospatial utilities
geo-utils contains two helpful utility functions:

 1. Point-in-polygon test
 2. Random point generator. Right now it performs better if the polygon covers a large portion of its bounding box. The test is performed using this algorithm.

 1. Generate a bounding box
 2. Generate a random point within this bounding box
 3. Perform a point-in-polygon test on this point. If the test succeeds, return the point, if not loop to step a and perform again.

 ** If anyone know of a better way to do above, let me know. I'd love to hear some better ideas especially when dealing with complex concave polygons.

USAGE:

Point-in-polygon test:

polygon = Polygon((0,0), (0,4), (4,4), (4,0), (0,0))
point = geo.Point(2,2)
assert polygon.contains(geo.Point(2,2))


Random point within a polygon

polygon = Polygon( geo.LatLon(42.39321,-82.92114),
 geo.LatLon(42.39194,-82.91669),
 geo.LatLon(42.39147,-82.91796),
 geo.LatLon(42.39090,-82.91974),
 geo.LatLon(42.39321,-82.92114))

point = polygon.random_point()
assert polygon.contains(point)


INSTALLATION:

You can install the package either by cloning this repository and running the standard

python setup.py install

or install from pypi

pip install geo-utils

last updated on:
June 2nd, 2010, 19:46 GMT
price:
FREE!
homepage:
github.com
license type:
BSD License 
developed by:
Ilya Sterin
category:
ROOT \ Utilities
geo-utils
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