[GRASS-stats] rgrass7: readVECT() issue with drivers other than ESRI Shapefile

[Roger Bivand]

Hi,

This has been lagging and needs attention - please provide a reproducible 
example. A work-around may also be to copy across the column names, but 
driver= is never regularly tested, and probably should be. rgrass7 uses:

nc_basic_spm_grass7

Roger

On Wed, 17 Jun 2015, Markus Neteler wrote:

> Hi,
>
> I am trying to get vector data from GRASS GIS 7 into R using rgrass7.
> The default driver is SHAPE which is not able to maintain the longer
> than 10 chars column names etc. So I tried GeoJSON which would do the
> job, yet I get:
>
>> mydata <- readVECT("table_2010_2014", driver="GeoJSON")
> Error in .read_vect_non_plugin(vname = vname, layer = layer, type = type,  :
>  Requested driver GeoJSON not supported
>
> Where does the error message come from? I guess R?
>
> So, reading ?readVECT I see:
> ...
>  driver: default ‘"ESRI Shapefile"’; a valid OGR writable driver name
>          to define the file format for intermediate files, one of
>          ‘c("GML", "SQLite"), c("ESRI_Shapefile", "MapInfo_File")’
>
> Is there any reason that GeoJSON is excluded?
>
> Trying with GML (since I really need to preserve the column names) it fails:
>
>> mydata <- readVECT("table_2010_2014", driver="GML")
> Error in paste(gtmpfl1, shname, sep = .Platform$file.sep) :
>  object 'shname' not found
>
> Likewise also the SQLite driver fails...
>
> Guess I'm missing something...
>
> best,
> Markus
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-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no