Hi,
You may want to check the package sp. There is one function called
"point.in.polygo" that might do what you want.
Good luck,
Monica
-
>Message: 32
>Date: Thu, 5 Feb 2009 14:51:36 +
>From: baptiste auguie
>Subject: Re: [R] maptool
Renaud Lancelot gmail.com> writes:
>
> See function pip (point in polygon) in package splancs.
>
> Renaud
>
> 2009/2/5 Rainer M Krug gmail.com>
>
> > On Thu, Feb 5, 2009 at 3:21 PM, Aleksandr Andreev
> > gmail.com> wrote:
> > > In R's maptools package, is there a built-in function to test i
See function pip (point in polygon) in package splancs.
Renaud
2009/2/5 Rainer M Krug
> On Thu, Feb 5, 2009 at 3:21 PM, 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
> > loa
On Thu, Feb 5, 2009 at 3:21 PM, 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.
If everything else fail
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,
baptiste
On 5 Feb 2009, at 13:21, Aleksandr Andreev wrote:
In R's maptools package, i
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
Gradua
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