Difference between revisions of "Point in polygon"

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'''''Q:''' Is there a way to query if a given point is inside a polygon (closed area)?''  
'''''Q:''' Is there a way to query if a given point is inside a polygon (closed area) which may have/not have a hole?''  


'''''A:''' Yes, with {{cmd|v.select}}. It allows you to select points which overlap areas or vice versa:
'''''A:''' Yes, with {{cmd|v.select}}. It allows you to select points which overlap areas or vice versa:


     v.select ainput=points binput=areas output=points_in_areas
     {{cmd|v.select}} ainput=points binput=areas output=points_in_areas


The resulting map 'points_in_areas' will contain points which are inside the area(s).
The resulting map 'points_in_areas' will contain points which are inside the area(s).

Latest revision as of 19:38, 29 September 2014

Q: Is there a way to query if a given point is inside a polygon (closed area) which may have/not have a hole?

A: Yes, with v.select. It allows you to select points which overlap areas or vice versa:

    v.select ainput=points binput=areas output=points_in_areas

The resulting map 'points_in_areas' will contain points which are inside the area(s).

See also