Roger Bivand wrote:
Is it necessary to fetch the map twice? If so, which xlim values should
be used, and how should the two maps be merged into one SpatialPolygons?
Note that if I change ‘xlim’ to c(0,30), Great Britain is missing ... :-(
As things stand, I suspect that there is no
On Thu, 14 Oct 2010, Karl Ove Hufthammer wrote:
Dear list members
The GSHHS map data uses longitudes from 0 to 360, which causes problems
fetching maps around longitude 0. Example:
library(maptools)
gpclibPermit()
gshhs.c.b - system.file(share/gshhs_c.b, package=maptools)
xl=c(-30,30)
Dear list members
The GSHHS map data uses longitudes from 0 to 360, which causes problems
fetching maps around longitude 0. Example:
library(maptools)
gpclibPermit()
gshhs.c.b - system.file(share/gshhs_c.b, package=maptools)
xl=c(-30,30)
yl=c(50,80)
rmap=Rgshhs(gshhs.c.b, xlim=xl, ylim=yl)