Agustin Lobo wrote:
> Hi!
>
> Does anyone has experience at displaying spatial R objects
> with QGis (perhaps using the python console + Rpy or RSpython)?
> I'm thinking on starting some testing and would like to know
> about previous experiences.
I've done a bit of work on this and I think the current best option
would be to save the R Spatial objects as shapefiles and then load them
into QGis. For raster data I save as ESRI Ascii Grid format.
Here's some other ideas:
* write a data provider for QGis in Python that uses Rpy to fetch the
data from an R Spatial object stored in a .RData file.
Advantages: neat and well-integrated
Disadvantages: tricky. might need some changes to the QGis C++
codebase. Only works in QGis.
* write a GDAL/OGR driver for R Spatial objects.
Advantages: every project that uses GDAL/OGR can use it. Frank
Warmerdam would think it's a good idea.
Disadvantages: would have to be in C++, I'm not sure how to write
GDAL/OGR drivers that use external libraries (libR.so in this case).
I think writing the GDAL/OGR driver would be the right thing in this
case, but it would require someone with lots of R and C experience to
code it up. Start here: http://www.gdal.org/ogr/ogr_drivertut.html
Barry
_______________________________________________
Qgis-user mailing list
[email protected]
http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
