You might also look here: http://www.mail-archive.com/r-h...@r-project.org/msg117045.html
The proposed solution worked for 'stack' but not for 'overlay' cheers, Kevin _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
