Just issue the command once in the session.
gpclibPermit()
Alternatively, you could wait for the rgeos package.
Nikhil Kaza
Asst. Professor,
City and Regional Planning
University of North Carolina
nikhil.l...@gmail.com
On Aug 19, 2010, at 7:12 AM, Breitbach, Nils wrote:
Dear Community,
trying to get through the examples from "Applied Spatial Data
Analysis with R" I got problems with the gpclib package.
The library was loaded correctly:
library(gpclib)
General Polygon Clipper Library for R (version 1.5-1)
Type 'class ? gpc.poly' for help
... but then when I tried to use the unionSpatialPolygons function I
recieved the following error message:
nc90.temp_spndf <- unionSpatialPolygons(nc90_spndf, IDs =
paste(nc90_spndf$ST, nc90_spndf$CO, sep="_"))
Error: isTRUE(gpclibPermitStatus()) is not TRUE
I am aware that GPC is not generally free but free for academic
research, which is hopefully what I am doing here. Do I have to
place a licence file somewhere to satisfy the gpclibPermitStatus
function? Or do I need to install the GPC software in addition to
the package?
Cheers,
Nils Breitbach
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