Hi Basile,
If you work with large data, then you should definitively consider using
SAGA GIS. Here are some examples:
--
# download gridded data:
download.file(http://geomorphometry.org/sites/default/files/volcano_maungawhau.zip;,
destfile=paste(getwd(),
I created a raster map, R20101001, using v.surf.rst. The
interpolation overshoots and dips below zero in a few areas. I'd like
to use r.mapcalculator, called from spgrass6, to replace all negative
values with zeros. But I can't seem to get the syntax right. The
following fails and
Dear list members,
i need a hint - i am stuck on my search for a function.
I would like to calculate cross-correlograms between two variables
(predator and prey densities) and use this as an index of spatial overlap.
I used the spdep pakcage and use e.g.
sp.correlogram(xy.data.nb, prey,
On Mon, Oct 4, 2010 at 10:15 PM, Ricardo Rodríguez
ricardorodo...@gmail.com wrote:
hi all, I have problems with installation of package 'XML' and I need as
rgdal not working with grass for lack of this package suggestions.
* installing *source* package ‘XML’ ...
checking for
On Tue, 5 Oct 2010, Aubrey Moore wrote:
I created a raster map, R20101001, using v.surf.rst. The interpolation
overshoots and dips below zero in a few areas. I'd like to use
r.mapcalculator, called from spgrass6, to replace all negative values with
zeros. But I can't seem to get the
I need help how to read IKNOS image using R raster library and then plot\show
that image. (very basic question, sorrry for this).
with Best Regards,
Malik Shahzad
Doctoral Student
Asian Institute of Technology (AIT)
Bangkok, Thailand
+66-8-7676-5616
Elizabeth,
Are you using a raster stack or a raster brick?
i've written out 'bricks successfully. Robert (maintainer) is Out of the
office for a bit
if you havent tried it using a brick, give that a go.
On Mon, Oct 4, 2010 at 8:20 PM, Elizabeth Crisfield ea...@psu.edu wrote:
I have read a 10
What is the format of the data?
if the file is in a standard format, please see the raster or brick
command
they will allow you to read direct from the file, with no trouble.
plot() just works as plot() is defined as a method for a raster layer and
for a brick if
you happen to have a multi band
Thanks, Roger
Your suggested incantation is the correct syntax for Windows.
execGRASS(r.mapcalculator, flags = c(overwrite),
parameters=list(outfile=result, amap=ddev,
formula=\if(A0,0,A)\))
- Aubrey
On 10/5/2010 7:56 PM, Aubrey Moore wrote:
I created a raster map, R20101001, using
