Re: AI-GEOSTATS: problems running FRAGSTATS
I am wondering if Wordpad is somehow truncating or corrupting your large
text files, especially since the smaller files work better. What is the
format - are they 2500 values on each of 2000 lines, or one value on each
line of a 2000x2500 line file? Either way, that is a really big file for
Wordpad, and not all software handles really long lines or huge files
properly. You might try using the freeware Programmer's File Editor (PFE)
instead (http://www.lancs.ac.uk/people/cpaap/pfe/). Good luck - let us
know what the solution turns out to be.
At 01:58 PM 4/3/01 -0700, Chandra Heaton wrote:
>This is my first message to this list, so forgive me--
>if the format is not quite right! I cannot get my
>data sets to run in FRAGSTATS and have tried every
>option I can think of --- does anyone have any
>I am a graduate student working on spatial patterns of
>mesquite regrowth following various treatments, and
>the relationships between these patterns and forage
>As part of my analysis, I would like to have
>patch-level proximity indices calculated by FRAGSTATS.
> I have the software and have tested it on sample
>data sets, so I know that it is working. However, it
>will not work with my particular data sets.
>This is how I created my data sets:
>I have created grids in ArcView which consist of
>background and woody patches. For every production
>data point (cages where forage data was collected), I
>have assigned the surrounding woody patches within a
>30-m radius to be the same class as the cage. There
>are 30 cages, and I assigned the background to be a
>value of 31. The only values are the woody patches of
>interest and the background, I reclassified everything
>I wasn't interested in to be the background value.
>I used the "export data source" option in ArcView to
>export these grids (3 are app. 2000 rows x 2500 cols,
>plus 2 that are a lot smaller) as ASCII rasters
>(*.asc). This appears to have worked.. I then opened
>these *.asc files in WordPad, and deleted the
>descriptive header rows so that the only thing in the
>file was the actual data. I saved these files as text
>files in WordPad (*.txt).
>When I try to use these text files to run FRAGSTATS,
>it will not run. I have tried the following things in
>an effort to get this to work:
>1. I have tried using the DOS command line in
>FRAGSTATS as well as going through the prompts for
>parameters, and get the same results either way.
>2. I tried reclassifying the background values to 1,
>to see if that would make a difference. I also tried
>a value of zero. I also tried telling the program the
>value of background and then not telling it the value
>of background --- all with no difference.
>3. I ran Patch Analyst in ArcView to see if there was
>some problem with the grids themselves, but it worked
>fine... if only I could get the patch-level output
>4. I tried one of my data sets that is smaller (146
>rows x 155 cols) and it will run - but only if I do
>not enter a value for proximity index, which is the
>one parameter I am really interested in. So it
>appears that there may be some issue with proximity.
>However, the test data sets I ran to see if the
>software was working did not have any problem with
>5. I tried saving the files as different types of
>text files (text, or text MS-DOS format, or text with
>line breaks) and it does not appear to matter.
>SO-- if you made it this far --- any ideas on what I
>can try to get my data sets to run in FRAGSTATS and
>give me patch-level proximity index results? I am at
>a loss. I don't even like to think about how much
>time my lab-mates and I have put into this so far. I
>am hoping that there is some simple solution I have
>overlooked, that someone has run into before.
>Thank you for reading, I look forward to any replies!
>Texas A&M University
>Dept of Rangeland Ecology and Mgmt
>alternate e-mail: chandra-heaton@...
>Do You Yahoo!?
>Get email at your own domain with Yahoo! Mail.
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