[R-sig-Geo] Kcross and envelope

Hi All, I have run into an unexpected outcome using Kcross() and envelope() that I hope someone can explain. My question is, why does envelope() produce different curves when no edge correction is specified and when correction is set as "none"? I would expect these curves to be closely the same,

[R-sig-Geo] Problem aggregating municipalities

I am having a problem with unionSpatialPolygons() in library(maptools). I am working with a shapefile of Mexico municipalities found here: http://mapserver.inegi.org.mx/data/mgm/ under Marco Geoestadístico Municipal 2009 Versión 4.1, Áreas Geoestadísticas Municipales (38.8 Mb). I need to combine