[R-sig-Geo] RSAGA under Linux (was: Slope and Aspect calculations in R)

Fri Jul 10 20:19:21 CEST 2009

Hi,

I have recently made some adjustments to RSAGA that will allow it to 
work under Linux too. I haven't uploaded it to CRAN yet, please try out 
this temporary build if you wish:

http://www.environment.uwaterloo.ca/u/brenning/RSAGA_0.9-6.tar.gz

I appreciate your feedback - unfortunately I am not a Unix/Linux user so 
I depend on your error reports.

Thanks to Carlos Grohmann for his support with the above adaptation to 
Linux.

Cheers
  Alex

Tomislav Hengl wrote:
> Yes: SAGA runs normally on Linux (I use it also), but you can not use the command line from R (i.e.
> RSAGA) to pass command to SAGA  :(
> 
> But you can use R to pass command lines to SAGA without RSAGA (i.e. the batch files):
> 
> http://saga-gis.wiki.sourceforge.net/Executing+Modules+with+SAGA+CMD 
> 
> Tom Hengl
> http://spatial-analyst.net 
> 
> 
>> -----Original Message-----
>> From: Thomas Adams [mailto:Thomas.Adams at noaa.gov]
>> Sent: Friday, July 10, 2009 4:20 PM
>> To: Tomislav Hengl
>> Cc: r-sig-geo at 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 (is a Linux distribution
>> available?).
>>
>> Regards,
>> Tom
>>
>> Tomislav Hengl wrote:
>>> Dear Josh, Thomas,
>>>
>>> I typically use R+SAGA (R on top!) for such type of analysis (and I do have access to all
>> operating
>>> system/software). There must be some good reasons that I am using SAGA (speed, stability, rich
>>> geomorphometry module etc.)! So do not give up so easy on SAGA.
>>>
>>> I especially like that SAGA is fairly efficient in processing big grids, and the commands are
>> rather
>>> compact. For example to reproject grids from one to another proj4string, you only need to set
>> e.g.:
>>>
>>>> rsaga.geoprocessor(lib="pj_proj4", 2, param=list(SOURCE_PROJ=paste('"', proj4string(dem25m),
>> '"',
>>> sep=""), TARGET_PROJ="\"+proj=longlat +datum=WGS84\"", SOURCE="TWI.sgrd", TARGET="TWI_ll.sgrd",
>>> TARGET_TYPE=0, INTERPOLATION=0))
>>>
>>> *see http://www.geomorphometry.org/R.asp
>>>
>>> I remember that somebody did manage to set-up SAGA also under Mac OS
>>> (http://www.saga-gis.uni-goettingen.de/html/index.php?module=pnForum&func=viewtopic&topic=458),
>> but
>>> I also remember that most of students on our GEOSTAT course used Windows under Mac OS to run
>> SAGA. I
>>> am sure that it should be possible to compile SAGA under Mac OS, but somebody needs to put some
>>> effort to bridge this gap (check also with Olaf Conrad).
>>>
>>> Here is more discussion about the same topic from few months ago:
>>> https://stat.ethz.ch/pipermail/r-sig-geo/2009-April/005418.html
>>>
>>> cheers,
>>>
>>> Tom Hengl
>>>
>>>
>>>
>>>> -----Original Message-----
>>>> From: r-sig-geo-bounces at stat.math.ethz.ch [mailto:r-sig-geo-bounces at stat.math.ethz.ch] On
>> Behalf
>>>> Of Thomas Adams
>>>> Sent: Friday, July 10, 2009 3:12 PM
>>>> To: Josh London
>>>> Cc: r-sig-geo at 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.
>>>> 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 wat to go.
>>>>
>>>> Tom
>>>>
>>>> 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 GRASS functions from
>>>>> within R. We have all our other analysis coded up in R, and just need
>>>>> these functions to do one part of a bigger process. Maybe I'm
>>>>> misunderstanding how to use R and GRASS together. I'll do some further
>>>>> research.
>>>>>
>>>>> Thanks again
>>>>> Josh
>>>>>
>>>>> Josh London wrote:
>>>>>
>>>>>> 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 we weren't re-inventing any wheels already out there.
>>>>>>
>>>>>> Thanks
>>>>>> Josh
>>>>>>
>>>>>>
>>>> --
>>>> Thomas E Adams
>>>> National Weather Service
>>>> Ohio River Forecast Center
>>>> 1901 South State Route 134
>>>> Wilmington, OH 45177
>>>>
>>>> EMAIL:	thomas.adams at noaa.gov
>>>>
>>>> VOICE:	937-383-0528
>>>> FAX:	937-383-0033
>>>>
>>>> _______________________________________________
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>>>> R-sig-Geo at stat.math.ethz.ch
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>>>>
>>> _______________________________________________
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>>> R-sig-Geo at stat.math.ethz.ch
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>>>
>>
>> --
>> Thomas E Adams
>> National Weather Service
>> Ohio River Forecast Center
>> 1901 South State Route 134
>> Wilmington, OH 45177
>>
>> EMAIL:	thomas.adams at noaa.gov
>>
>> VOICE:	937-383-0528
>> FAX:	937-383-0033
> 
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-- 
Alexander Brenning
brenning at uwaterloo.ca - T +1-519-888-4567 ext 35783
Department of Geography and Environmental Management
University of Waterloo
200 University Ave. W - Waterloo, ON - Canada N2L 3G1
http://www.fes.uwaterloo.ca/geography/faculty/brenning/