Dear r-helpers,
I have a graph created using the library 'spatgraphs'.

library(spatstat)
library(spatgraphs)
xy <- rbind(c(28.39, -16.27), c(30.62, -20.13), c(32.25, -28.7), c(22.43,
-27.22), c(27.5, -21.17), c(31.22, -24.52), c(17.93, -26.92), c(18.72,
-17.95), c(24.15, -17.82), c(29.23, -22.85))
ow <- owin(xrange=range(xy[,1]), yrange=range(xy[,2]))
pp <- ppp(x=xy[,1],y=xy[,2],n=nrow(xy),window=ow)
gg <- spatgraph(pp=pp, type="gabriel")
plot(gg, asp=1, pp=pp, add=FALSE)
lines(xy[c(1,2,10,6,3,4,7,8,9,1),],col=2,lwd=2)

and now I need to automatically extract polygon corresponding to its outer
boundary, highlighted here in red. Are you aware of such function in R? I
looked for it hard but with no success.
Thank you in advance for any hint.

Ondřej

-- 
Ondřej Mikula

Institute of Animal Physiology and Genetics
Academy of Sciences of the Czech Republic
Veveri 97, 60200 Brno, Czech Republic

Institute of Vertebrate Biology
Academy of Sciences of the Czech Republic
Studenec 122, 67502 Konesin, Czech Republic

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