Hello Josh, and list,
Figuring out how to link R with GIS may be extremely useful to you, not just
for calculating slope and aspect, but also for other analyses in the future.
There are also reasons you might not want to; I am one of those people who
likes to write his own code. Consequently I
slav Hengl
Cc: r-sig-geo@stat.math.ethz.ch
Subject: Re: [R-sig-Geo] Slope and Aspect calculations in R
Tom,
Thanks! I have seen your posts and results of some of your work with
SAGA and I am very interested. But, I have been to lazy to this point to
try compiling SAGA for either MacOS X or Linux (
Tom Hengl
http://spatial-analyst.net
> -Original Message-
> From: Thomas Adams [mailto:thomas.ad...@noaa.gov]
> Sent: Friday, July 10, 2009 4:20 PM
> To: Tomislav Hengl
> Cc: r-sig-geo@stat.math.ethz.ch
> Subject: Re: [R-sig-Geo] Slope and Aspect calculations in R
>
z.ch
[mailto:r-sig-geo-boun...@stat.math.ethz.ch] On Behalf
Of Thomas Adams
Sent: Friday, July 10, 2009 3:12 PM
To: Josh London
Cc: r-sig-geo@stat.math.ethz.ch
Subject: Re: [R-sig-Geo] Slope and Aspect calculations in R
Josh,
I use R & GRASS together on both MacOS X and Linux without problems.
-sig-geo-boun...@stat.math.ethz.ch
> [mailto:r-sig-geo-boun...@stat.math.ethz.ch] On Behalf
> Of Thomas Adams
> Sent: Friday, July 10, 2009 3:12 PM
> To: Josh London
> Cc: r-sig-geo@stat.math.ethz.ch
> Subject: Re: [R-sig-Geo] Slope and Aspect calculations in R
>
> Josh,
>
&g
Josh,
I use R & GRASS together on both MacOS X and Linux without problems.
It's very direct to write a shell script that calls both R & GRASS
within a single script. Writing a R script that calls GRASS may be more
tedious to do what you want. Writing a shell script that calls both may
be the
Hi Josh,
Almost on windows (sorry!) I start a grass session under MSYS (that emulate
a unix like environment), and from the "shell" I start R (with something
like /c/Progra~2/R/R-2.9.0/bin/Rgui.exe& ). After, on R, I load spgrass6
package, which will allow the communication between your R session
On Thu, 9 Jul 2009, Josh London wrote:
Thanks for the suggestions so far regarding the use of GRASS or SAGA.
We have considered those options but SAGA doesn't appear available for MacOS.
My understanding is that spgrass6 is more for accessing R code/functions from
within GRASS vs accessing GR
Thanks for the suggestions so far regarding the use of GRASS or SAGA.
We have considered those options but SAGA doesn't appear available for
MacOS. My understanding is that spgrass6 is more for accessing R
code/functions from within GRASS vs accessing GRASS functions from
within R. We have all
Hi Josh,
How about you play R with GRASS (spgrass6 package) or SAGA (RSAGA package)?
May be you will get better results, mainly you can do other geoprocessing on
your data.
Cheers
milton
brazil=toronto
On Thu, Jul 9, 2009 at 1:20 PM, Josh London wrote:
> Hello
>
> We are looking to mimic, in
Josh,
I can not answer your specific question WRT R, but before you embark on
this, you may consider R with GRASS GIS — they play together pretty
nicely and the slope and aspect capabilities are part of GRASS.
Regards,
Tom
Josh London wrote:
Hello
We are looking to mimic, in R, the slope (
Hello
We are looking to mimic, in R, the slope (max magnitude difference
between a cell and its neighbors) and aspect (direction of maximum
magnitude difference) functions found in ESRI's Spatial Analyst package.
We were just about to code up the slope function but thought I would
make sure w
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