[R] [R-sig-Geo] Problem with read.shape in maptools

Roger Bivand Roger.Bivand at nhh.no
Sat Jul 23 13:19:12 CEST 2011

On Sat, 23 Jul 2011, Axel Urbiz wrote:

> Hi,
> I'd like to read a shapefile into a Map object. This is exactly what
> read.shape{maptools} is suppoed to do, according to the documentation I
> found in the link below.

Do search the archives properly; the second hit on googling 
"list:R-sig-geo read.shape" is relevant. Summarize to the list when you've 
resolved your problem. In addition, R is case specific, so an S3 Map 
object is not an S3 map object.

Your previous mail refers to a function in the maps package, which does
things that may be supported elsewhere. The only function that seems to
convert SpatialPolygonsDataFrame to a list like the map class is
fortify.SpatialPolygonsDataFrame() in ggplot2, but I don't know if this
does what you need. To be honest, you havent't explained what you want to
do with smooth.map that you cannot do with sp objects - please do read the
available documentation before cross-posting (first post).


> However, this doesn't seem to work
> library(maptools)x <- read.shape(system.file("shapes/sids.shp",
> package="maptools")[1])Error: could not find function "read.shape"
> I haven't found this function on the documentation from the latest
> release of the package, so I assume is no longer supported. Is there
> an alternative way of doing this?
> http://rss.acs.unt.edu/Rdoc/library/maptools/html/read.shape.html
> Thanks,
> Axel.
> 	[[alternative HTML version deleted]]
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Roger Bivand
Department of Economics, NHH Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no

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