[R] maptools: Test if point is in polygon

baptiste auguie ba208 at exeter.ac.uk
Thu Feb 5 15:51:36 CET 2009

I don't know about the maptools package but one general way to do this  
would be to compute the convex hull (?chull)  of the augmented set of  
points and test if the point belongs to it.

Hope this helps,


On 5 Feb 2009, at 13:21, Aleksandr Andreev wrote:

> In R's maptools package, is there a built-in function to test if a
> given point is "inside" a given polygon on the map?  The map was
> loaded from an ESRI Shapefile. The point's latitude and longitude are
> known.
> Thank you!
> Aleks
> --
> ------------------------
> Aleksandr Andreev
> Fulbright Fellow
> Graduate School of Management
> St Petersburg State University
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Baptiste Auguié

School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,

Phone: +44 1392 264187


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