Message-ID: <loom.20080312T132005-555@post.gmane.org>
Date: 2008-03-12T13:28:04Z
From: Roger Bivand
Subject: Error opening SHP file (maptools)
Don MacQueen <macq <at> llnl.gov> writes:
>
> The help page for readShapePoints says that the file name that you
> supply should not include the extension.
>
> The "system.file" part of the example in the help page is only to use
> the example file that came with the package. Since you want to open
> your own file you omit the system.file() bit.
>
> Do something like:
>
> readShapePoints( 'C:/path_to_my_file/filename')
You may also - for safety's sake - say:
list.files(path="C:/path_to_my_file", pattern="filename")
to make sure that at least the minimum three files that make up a
"shapefile" are present: filename.dbf, filename.shp, and filename.shx.
Note that in Windows you can also use the file chooser, by saying:
readShapePoints(file.choose())
which will let you navigate to, and "see" the file name for yourself.
Roger
PS. As Paul mentioned, the R-sig-geo list is well suited to this
kind of question.
>
> Hope this helps.
> -Don
>
>