Hi,

On 5-8-2013 17:17, Ederson de Moura wrote:

Hello guys,

I need to find a point within "MultiPolygon". I'm trying to apply the same logic of the "polygon" example:

http://www.boost.org/doc/libs/1_54_0/libs/geometry/doc/html/geometry/reference/algorithms/within/within_2.html

But not to the point the result is always not found. Could someone help me?

  boost::geometry::read_wkt( "MULTIPOLYGON(((0 0, 0 10, 10 10, 10 0, 0 0)), ((10 5, 10 15, 20 15, 20 5, 10 5)))", p_multi );

  int x = 10;
  int y = 10;

Your point is a cornerpoint of the specified multi-polygon. So it is not "within". You can use covered_by to detect if a point is within-or-on-the-border of a (multi)polygon.

Regards, Barend


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