[R-sig-Geo] R-sig-Geo Digest, Vol 57, Issue 12

[Nicholas Lewin-Koh]

Hi,
It would be difficult but not impossible to bring ggobi to
play here. The biggest issue is, as always, which
event loop is in control, R, GTK, QGIS?
Managing so many layers can be daunting and slow.
There was some discussion on the ggobi list about embedding
ggobi in manifold, which is a commercial package and windows only, and,
...
IT would be really nice to get a spatial eda application that
incorporates
spatial attributes. Some of the old ArcView-xgobi link code has been
ported into
ggobi as the variogram cloud plugin. I know there is (or was) interest
among
the ggobi developers in getting a spatial application working to allow
brushing
of maps in a linked environment. Anyway I am rambling.

Hope this helps

Nicholas




> Date: Tue, 13 May 2008 22:19:07 +0100
> From: Barry Rowlingson <b.rowlingson at lancaster.ac.uk>
> Subject: Re: [R-sig-Geo] Qgis-user Digest, Vol 27, Issue 13
> To: Carson Farmer <cfarmer at uvic.ca>
> Cc: qgis-user at lists.osgeo.org, r-sig-geo at stat.math.ethz.ch
> Message-ID: <482A05CB.6050403 at lancaster.ac.uk>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> Carson Farmer wrote:
> > I think in the end this would 
> > require an ogr/gdal driver for sp objects as Barry Rowlingson has 
> > previously suggested here, and in the r-sig-geo lists.
> 
>   Progress on this has been minimal: I managed to create an ogr driver 
> with a new name! There's a few places that you need to edit to link in 
> the new driver in the ogr build system. Then I started to worry about 
> how to link in to libR.so and stopped there. I need to find out how the 
> OGR build system works with other library dependencies, and that 
> probably means understanding autoconf... Beyond me at the moment...
> 
> > I have started to look at some brushing and linking functions using the 
> > iPlots R package, and should hopefully be able to implement some of 
> > these things in the future...?
> 
>   Isn't the ultimate in linking and brushing GGobi? There's a link from 
> R to GGobi for displaying R data in GGobi. What might be nice would be a 
> GGobi plugin for Qgis - set up so that brushed items in the GGobi view 
> are highlighted in the Qgis map.
> 
>   I've looked at the C code in the R-GGobi interface and it looks very 
> difficult....
> 
> Barry
> 
> 
>