Calculating the center latitude longitude of a polygon in PHP

Question

I have a set of points (stored as lat / lon) for a polygon, I want to calculate the center point of the lat / lon of a polygon in PHP.

Basically do the same as getCenter () in Google Maps LatLngBounds .

Any ideas on how I can achieve this?

Answer 1

What you are looking for is the center of gravity of the polygon - it's pretty easy to calculate. If you use latitude / longitude, the question is complicated by the fact that the polygon is actually located on the surface of a sphere (ellipsoid).

, Google api javascript?

Answer 2

google "" >

: http://en.wikipedia.org/wiki/Centroid