January 28, 2020, 03:06:28 PM


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Sorry about the delay in response.  

This was an error in SLAMM 6.7 output to GIS files.  

It has been fixed in a maintenance output that I'm posting today. See http://warrenpinnacle.com/SLAMMFORUM/index.php?topic=201.0


Using SLAMM / Re: Out of Memory error messag...
Last post by Jonathan S. Clough - March 02, 2017, 07:42:54 AM
I am not an ArcMap user but I'd guess that you need to use a 64 bit operating system and more RAM if you can upgrade your computer.  It is good that RAM is inexpensive as SLAMM and GIS software tends to use a lot of memory!  That is more important, generally, than CPU speed at this point. 
Using SLAMM / Out of Memory error message in...
Last post by pse1999 - February 26, 2017, 03:48:16 PM
I keep getting an out-of-memory error message in ArcMap when trying to create an attribute table through the wetland input raster in preparation to use it in the SLAMM model. Has anyone run into this issue before? Solutions? I am assuming it has to do with processing power.
Using SLAMM / Re: NWI
Last post by kij4 - February 22, 2017, 06:23:33 AM
Thank you!

I got it working in the end, I followed the steps on the other thread but wasn't working. My friend got it working after noticing the file wasn't exporting properly!

Thank you for your assistance though.
Using SLAMM / Re: NWI
Last post by Jonathan S. Clough - February 22, 2017, 05:47:31 AM
Hello.  The steps are basically as follows:

1. Get the NWI shape-file
2. Add an integer field to the NWI dbf file called SLAMMCODE for ecample
3. Use the latest xls crosswalk to fill in the fields of the SLAMMCODE based on the NWI code
4. Convert the shapefile to raster using the SLAMMCODE as the basis
5. Always QA/QC and ground-truth the conversion.  The NWI is not perfect, the crosswalk is not perfect and sometimes there is ambiguity between Cowardin classes and SLAMM codes.

Now, we can and have provided additional assistance on individual steps, so let us know if and when you are getting stuck.

Also, see this thread:  http://warrenpinnacle.com/SLAMMFORUM/index.php?topic=255.0
Model Formulation & Parameters / Re: Initial Condition Change i...
Last post by maryramirez - February 15, 2017, 09:59:45 AM
Follow up to the 2nd issue I described:
The (erroneous) switch from tidal swamp to inland shore occurs when using SLAMM 6.7. I just ran all the same datasets/parameters using SLAMM 6.2, and tidal swamp remains. Is this an issue with the latest version of the software?
Last post by kij4 - February 12, 2017, 10:43:44 AM

I was just wondering how you incorporate NWI codes into SLAMM, I am a beginner with SLAMM and computer codes in general, I am struggling with the incorporating of the NWI codes. I have got a friend who has helped with the conversion of slope and DEM data but we are both stuck on the NWI codes!

I got the main bulk of my dem and aerial imagery from earth explorer and has been manipulated in arcmap, and exported! I am just struggling with the NWI, any advice or help will do!

Many thanks,
Model Formulation & Parameters / Initial Condition Change in We...
Last post by maryramirez - January 23, 2017, 10:53:04 AM
I am using SLAMM for the Hood Canal area in Puget Sound. I have 2 issues I'm seeking advice on:

1. Considerable areas of Undeveloped Dry Land transition to Trans. Salt Marsh category at time zero. I have adjusted the elevation range and lowered the Salt Elevation. Changing the Salt Elevation has helped this issue, though I still have Trans. Salt Marsh fringing Tidal Flats all along the shoreline where there was none in the input data. I'm somewhat okay with where this is at, but if anyone has other suggestions to try, that would be great.

2. All of the Tidal Swamp cells transition to Inland Shore at time zero. This I can't figure out. I have adjusted the elevation range and the elevation analysis (attached) doesn't seem to point to a problem (less than 5% of cells are below min elev). The model shows Tidal Swamp on the Set Map Attributes screen, but all outputs (including Initial Condition) have those cells as Inland Shore. Any advice here would be greatly appreciated.
Using SLAMM / Re: Using SLAMM wih Arcmap
Last post by Jonathan S. Clough - January 10, 2017, 08:41:32 AM
SLAMM is not compatible with TIFF files at this point.  Hopefully soon as we are expanding direct GIS-file integration.  However, for now, you must export to ESRI ASCII Rasters.  Please see


and also see pages 79-80 of this document


Good luck!  -- Jonathan
Using SLAMM / Using SLAMM wih Arcmap
Last post by kij4 - January 07, 2017, 07:04:27 AM

I am hoping to use SLAMM 6 for my undergraduate dissertation. However I am struggling, I have my data in arc map, I have exported the slope & Dem as .tiff files, I assumed the NWI was the area of salt marshes I was using however this does not seem to be the case when I try and execute with the data I have the following message comes up:

Data file "" Does Not Include" "no data_value" identifier

The salt marshes I am using have an accumulation rate of 10 mm/yr. and I am not sure what I am doing with the progamme I have tried to figure it out myself but I can't seem to get it right.

Can anyone help me with regards to exporting the data I have in Arcmap into SLAMM 6, and any tips on how to get it to all work.

I will be eternally grateful for anything that would help, as my department isn't willing to help at this point.
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