Google Maps

[ankhmor]

How would I calculate if a coordinate lies within a polygon with an indefinite amount of points?

If that's really complex math how would I do the same if the polygon had only four points?

 

All using Google Maps. But for this I mostly need the math.

[salathe]

The math isn't particularly complicated, to see a description of the problem and existing algorithms visit PIP on wikipedia. 

 

Perhaps of more immediate benefit to yourself would be an existing solution in JavaScript to work specifically with Google Maps like a google.maps.Polygon.containsLatLng extension.

[ankhmor]

thanks A LOT