Thanks for all answers. I need to use these functions to make a Geofencing routines. I think that I can make this: *If I want to verify if a point is inside of a POLYGON:* Draw a polygon in map and use GPolygon.prototype.Contains functions to verifiy if the point inside or outside of polygon (thanks for http://econym.googlepages.com/example_inside.htm) *If I want to verify if a point is inside of a CIRCLE:* A circle of radius R leaving of the point P1. I calculate the size of radius R in kilometers. To check if the point is inside or outside of circle, check the distance of desired point and the central point(P1). If distance <= size Radius the point is inside of circle. This is an alternative not to use the functions of MySQL or Postgree.
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