[R-sig-Geo] map2SpatialPolygons' 'proj4string' in spmaps
Sebastian P. Luque
spluque at gmail.com
Wed Oct 15 18:49:06 CEST 2008
I don't understand what the 'proj4string' argument in
map2SpatialPolygons() does. map() in the maps package has a
,-----[ *help[R](map)* ]
| projection: character string that names a map projection to use. See
| 'mapproject' (in the 'mapproj' library). The default is to
| use a rectangular projection with the aspect ratio chosen so
| that longitude and latitude scales are equivalent at the
| center of the picture.
so I don't know what projection was actually used in a given map() call
with that default 'projection' argument. I suppose 'proj4string' in
map2SpatialPolygons() should match the actual projection used in the
map() call, shouldn't it? Thanks.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 196 bytes
Desc: not available
More information about the R-sig-Geo