Paolo Cavallini wrote:
Breitbach, Nils ha scritto:
I am looking for a R-function (or if there is none directly in R in GRASS or
QGIS) that works
just like the MulitBuffer Tool from the Toolbox in ESRIs ArcGIS. Furthermore I
would like to use
an equivalent to the ArcGIS Tools Intersect and Dissolve. Since I am just
starting to do
geographical analyses with R I just do not know where to look for equivalent
functions in R
(Grass or QGIS).
In QGIS you have a nice fTools toolbox who does intersect and dissolve (and
more). What is
MultiBuffer doing? If you want to do it programmaticaly, you may be better
using GRASS or R, if you
want interactive, visual command, then your choice will probably be QGIS.
All the best.
I am also unsure about what the Multibuffer tool is doing... Given the
name of the tool, maybe the R function buffer (from adehabitat) might
also help... But it would be rather limited if you have to compute
buffers on large raster maps (large extent and small resolution, i.e. a
large number of pixels). Otherwise, you may also consider v.buffer from
grass. Or, as suggested by Paolo, QGIS is probably a better choice if
you want an interactive program. And in any case, to my knowledge, a GIS
(grass or qGIS) is better suited than R for intersection and dissolve
operations.
Best wishes,
Clément Calenge.
--
Clément CALENGE
Office national de la chasse et de la faune sauvage
Saint Benoist - 78610 Auffargis
tel. (33) 01.30.46.54.14
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