[R-sig-Geo] readVECT6 error in spgrass6 (CVS version)

[Roger Bivand]

On Mon, 20 Apr 2009, William McCoy wrote:

> Roger,
>
> Great.  I used the rgdal from CVS and that works fine.

The spgrass6 cvs has also been updated to guard against using an argument 
to readOGR in rgdal not present in earlier versions.

Roger

>
> Thanks, Bill
>
>
> Roger Bivand wrote:
>> On Mon, 20 Apr 2009, William McCoy wrote:
>> 
>>> I am trying to duplicate the example of T. Hengl given in his message of 
>>> 2 Apr 2009 regarding "Running analysis on DEMs using GRASS (from R?)".  I 
>>> have retrieved the latest CVS version (as of last night) of spgrass6 (v. 
>>> 0.6-5). I am running on a 32-bit Intel Fedora 10 system.
>>> 
>>> Everything seems to work up until the point that I try to import the 
>>> streamt vector file into R:
>>> 
>>>> streamt <- readVECT6("streamt")
>>> Error in readOGR(dsn, layer = "1", verbose = !ignore.stderr, pointDropZ = 
>>> pointDropZ) :
>>>  unused argument(s) (pointDropZ = FALSE)
>>> 
>>> Apparently readOGR has no "pointDropZ" argument and the rgdal 
>>> documentation seems to confirm this.  Is this a bug in this CVS version of 
>>> spgrass6?
>> 
>> No, but you need the CVS version of rgdal too. The GRASS OGR plugin 
>> spuriously generates a third coordinate, so that its use in spgrass6, using 
>> rgdal (readOGR) led to a failure in a later script. The released versions 
>> of both packages are in sync, to have CVS spgrass6 work, use the CVS rgdal 
>> (sourceforge project rgdal, module rgdal).
>> 
>> Roger
>> 
>>> 
>>> Here is my sessionInfo():
>>> 
>>>> sessionInfo()
>>> R version 2.8.1 (2008-12-22)
>>> i386-redhat-linux-gnu
>>> 
>>> locale:
>>> LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C 
>>> 
>>> attached base packages:
>>> [1] stats     graphics  grDevices utils     datasets  methods   base
>>> 
>>> other attached packages:
>>> [1] spgrass6_0.6-5  XML_2.3-0       rgdal_0.6-7     maptools_0.7-22
>>> [5] sp_0.9-34       foreign_0.8-34
>>> 
>>> loaded via a namespace (and not attached):
>>> [1] grid_2.8.1      lattice_0.17-22 tools_2.8.1
>>> 
>>> 
>>> 
>> 
>
>

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, 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