[GRASSLIST:6627] Re: Grass GIS and Fragstats on Linux!
mlennert at club.worldonline.be
Tue Apr 26 10:23:25 EDT 2005
On Tue, April 26, 2005 15:57, Paolo Cavallini said:
> Good new - thanks Sander.
> However, AFAIK Crossover Office is not free software. It would therefore be
> important to check if Fragstats works under wine.
I don't have any data to try any serious work, but it installs and executes
perfectly with wine version 20050310 on Debian GNU/Linux and I can open all
If someone has some data, I am willing to test...
> In the long term, we should see if it's possible to either port Fragstats
> under linux, integrate it more closely with grass, and/or rewrite r.le.
> All the best.
> At 10:55, martedì 26 aprile 2005, Sander Oom has probably written:
>> Dear Fragstats and Grass GIS users,
>> To my pleasant surprise I have successfully run Fragstats on a Linux
>> machine in conjunction with my Grass GIS database.
>> I tried the landscape index tools r.le within Grass, but ran into
>> several problems (see earlier posts on the Grass mailing list). Than I
>> started looking for an alternative. Fragstats is a powerful and well
>> tested program, but it is only available for Windows.
>> However, when running the Fragstats setup program using CrossOver Office
>> on my Linux machine, the installer finished without any errors! I have
>> tried several options and methods and have not seen the program crash
>> yet! I guess the success is a result of the combination of the little
>> dependency of Fragstats on odd windows dll's and the progress made in
>> the Wine project, the basis for CrossOver Office. I have not tested
>> Fragstats on Wine.
>> Below you find the Grass code to prepare your data for Fragstats. I used
>> the Albers Equal Area projection to prepare my rasters. Using sed (Linux
>> utility) I removed the header from the exported ascii file. Fragstats
>> only wants the points. I put the header content in a file called
>> 'asc_header_aea.txt' so I could paste it back in later, as Fragstats
>> returns exactly the same grid of points. Fragstats creates a new folder
>> with an ascii grid (no header nor an extension!) for each index
>> calculated, so I wrote a loop to go through the files, add the header
>> and read the result into Grass. Then I queried the raster with a points
>> vector and exported the results to a text file.
>> Hope this is helpful for other Grass/Linux users!
> Paolo Cavallini
> cavallini at faunalia.it www.faunalia.it www.faunalia.com
> Piazza Garibaldi 5 - 56025 Pontedera (PI), Italy Tel: (+39)348-3801953
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