On Thu, 13 Oct 2005, Markus Neteler wrote:
> (cc grass user list)
>
> On Wed, Oct 12, 2005 at 05:43:35PM +0200, Markus Neteler wrote:
> > On Tue, Oct 11, 2005 at 03:50:05PM +0200, Roger Bivand wrote:
> > > On Tue, 11 Oct 2005, Yilin Liu wrote:
> > >
> > > > Dear all,
> > > >
> > > > Any way to
(cc grass user list)
On Wed, Oct 12, 2005 at 05:43:35PM +0200, Markus Neteler wrote:
> On Tue, Oct 11, 2005 at 03:50:05PM +0200, Roger Bivand wrote:
> > On Tue, 11 Oct 2005, Yilin Liu wrote:
> >
> > > Dear all,
> > >
> > > Any way to get the length of common boundaries shared by neighbouring
> >
On Tue, Oct 11, 2005 at 03:50:05PM +0200, Roger Bivand wrote:
> On Tue, 11 Oct 2005, Yilin Liu wrote:
>
> > Dear all,
> >
> > Any way to get the length of common boundaries shared by neighbouring
> > counties in a map in R?
> >
>
> The short answer is no. The R polygon objects do not have topol
Ah! Thanks - it makes heaps of sense. I'd had inklings but you've put
it all together for me. Now I get why graph theory is so important . . .
Cheers, Mike.
___
R-sig-Geo mailing list
R-sig-Geo@stat.math.ethz.ch
https://stat.ethz.ch/mailman/listinfo/
Michael Sumner wrote:
> Hello, could you expand on what you mean by "topology" in this context?
> I assume it means that any area/polygon object in a given set is a
> subdivision of the plane - i.e. no "overlaps"? Since, if that were true
> of the dataset then "common shared boundaries" is someth
>> Dear all,
>>
>> Any way to get the length of common boundaries shared by neighbouring
>> counties in a map in R?
>>
Roger Bivand said:
>The short answer is no. The R polygon objects do not have topology.
Hello, could you expand on what you mean by "topology" in this context?
I assume it
On Tue, 11 Oct 2005, Yilin Liu wrote:
> Dear all,
>
> Any way to get the length of common boundaries shared by neighbouring
> counties in a map in R?
>
The short answer is no. The R polygon objects do not have topology.
The longer answer is that if you have e00 or ArcInfo binary vector layers
Dear all,
Any way to get the length of common boundaries shared by neighbouring
counties in a map in R?
Yilin
___
R-sig-Geo mailing list
R-sig-Geo@stat.math.ethz.ch
https://stat.ethz.ch/mailman/listinfo/r-sig-geo
