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Messages - chayek

I figured out a way to do it and thought I would share with others:

If you load the output back into GIS, you can use the "raster math" toolset to subtract the output from the input, giving you a rster in which all non-zero values represent areas that experience change.  Those areas can then be inspected in greater detail.
I'm modeling a relatively large area and I was wondering if there is an automated way to identify areas with significant changes or if I should rely soley on visual inspection.

I am modeling an area that includes the zone of tidal influence for a river feeding into a bay.  Does the model have any kind of damping effect on sea level rise as you move upstream, or does it simply assume that the same sea level rise is experienced for all water with SLAMM category 17?

Using SLAMM / Range Check Errors
March 30, 2010, 07:19:20 AM
I'm getting a "range check" error and I'm not sure why.  All three of my input rasters are the same size and in the right places, the number of cells to track is only 5.5 million, and there are no zeros in my NWI file.  I can't think of anything else to check for.  A little help, please?
Using SLAMM / compatible operating systems
March 29, 2010, 04:58:04 AM
Can SLAMM be run on a Mac OS?
Using SLAMM / Re: Execution Results
March 18, 2010, 07:34:51 AM
When I said "see it" I was thinking if it hadn't saved somewhere already.  I had assumed the default save location to be the folder where the simulation was saved, but I foudn the file, as you said, in the folder where the DEM had been.

Thanks for the help!
Using SLAMM / Execution Results
March 17, 2010, 12:32:04 PM

I executed my simulation to save tabular data only.  The simulation finished after 2.5 hours, but no tabular datae to be seen.  Should it pop up automatically or is it saved to a default location?  If it was supposed to pop up, what might have prevented it from doing so?

Regardless of where the data went, do I have to run the entire model over again to see it next time, or is it saved once it's been run?

Also, tried using "Set Map Attributes" button and after taking about 15 minutes to go through the loading process, got an error message that it couldn't open the map.  Any connections to the above problem?

Using SLAMM / Re: NWI to SLAMM land cover classes
March 16, 2010, 06:40:41 AM
So I am running into several situations where the NWI classification is a mix of two different wetland types (denoted by a slash), each of which falls into a different SLAMM category.  How do I know which SLAMM category to use?  Is the first of the two wetland types dominant?
Using SLAMM / Re: NWI to SLAMM land cover classes
March 11, 2010, 01:49:00 PM
The link for the excel file provided earlier in this thread is not working.  Can you please direct me to the latest lookup table?


I'm trying to do some modeling in the Narragansett Bay area and I'm havign trouble finding accretion and erosion parameters.  Any idea where I might be able to find this kind of information?

As an alternative, are there any standard values that can be used if no dpecific data is identified?