Hi,

alphahull is nice but having a SpatialPolygonsDataFrame from the result is
quite tricky

If anyone has the solution..

2012/6/22 Michael Sumner <mdsumner@gmail.com>

> Try the alphahull package, which is on CRAN.
>
> I don't believe it will smooth the result for you, but you could take
> it from there and use other R functions to do that.
>
> Cheers, Mike.
>
>
> On Fri, Jun 22, 2012 at 4:56 PM, PCB <pedrocontebarros@gmail.com> wrote:
> > Dear All,
> >
> > I have a set of observations on an area, and I would like to define the
> > "investigated area" as the smallest polygon (preferably smoothed with
> e.g.
> > splines fit) that encloses all the points. This is similar to the convex
> > hull problem, except that my data have "gulfs", i.e. areas that are not
> > sampled (and should not be), between two "fingers" of areas
> investigated. I
> > am sure I have seen something about solving this lately, but after a
> couple
> > days searching could not find it (I am sure I am using the wrong
> > keywords...).
> >
> > Any help would be appreciated
> >
> > --
> > View this message in context:
> http://r-sig-geo.2731867.n2.nabble.com/External-Envelope-of-a-set-of-points-in-space-not-convex-hull-tp7580290.html
> > Sent from the R-sig-geo mailing list archive at Nabble.com.
> >
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>
>
> --
> Michael Sumner
> Hobart, Australia
> e-mail: mdsumner@gmail.com
>
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