SLAMM Forum

General Category => Using SLAMM => Topic started by: wbsonic on September 21, 2016, 07:36:46 PM

Title: Beginner SLAMM user: Have a question about input files
Post by: wbsonic on September 21, 2016, 07:36:46 PM
Hi!

So I've been trying to setup some basic input files for SLAMM so I can play around with the software some.
I'm pretty sure I have correctly set up the DEM and Slope inputs, but I'm having trouble understanding the NWI input.

What steps should I take to ready NWI files for SLAMM?
I've looked at the US Fish and Wildlife NWI files in ArcGIS, and read the SLAMM guides on converting to SLAMM categories.

How would you go about doing this?
Any help would be greatly appreciated.

Thanks
Title: Re: Beginner SLAMM user: Have a question about input files
Post by: Jonathan S. Clough on September 22, 2016, 07:44:33 AM
Thanks for this question.  It's a good one.  I'll answer now quickly and let Marco fill in any details I've missed:

General steps are:



Marco -- any advice that I missed?


Title: Re: Beginner SLAMM user: Have a question about input files
Post by: marco.propato on September 22, 2016, 12:16:13 PM
Let me add some practical details. You cannot edit and save a dbf in excel and then save it. So, we usually:
(1) make a copy of the dbf (saved the old one as *_old.dbf just in case of mistakes).
(2) open the new dbf in excel and copy the land cover attributes
(3) paste them into the lookup excel file
(4) as Jonathan wrote, check if all the codes have been crosswalked and if not try to determine the correct crosswalk.
(5) Copy the crosswalked column (from row one to the last, not the entire column)
(6) Open the dbf using Open Office Calc.
(7) Paste the data as a new attribute column (e.g. SLAMMCLASS) and save. (Sometime saving is not possible because the precision of some attribute columns. You can change them accordingly in the first row, e.g. Length,N,10,5 is the attribute Length with 10 digits total and 5 digits after the comma).

Good luck, Marco
Title: Re: Beginner SLAMM user: Have a question about input files
Post by: wbsonic on October 02, 2016, 03:15:34 PM
Thanks for the advice. I followed your steps and managed to create a SLAMM NWI atrributes raster, which I clipped and converted to the DEM/SLOPE cell sizes.

I managed to run the basic SLAMM file inputs, but when it finishes running, I get a blank screen instead of a map.