Re: GIS and Swarm

[M Lang / S Railsback]

Li An wrote:
> 
> Thanks. Can Swarm work with Arc/Info data directly without converting data
> to matrix format? There should be a study group with focus on the
> integration of GIS and Swarm--anyone knows where it is? Thanks a lot. Li

Yes there *should* be a GIS-Swarm working group, and there are a few
people doing things. Hopefully Paul Box will also address your question
- he seems to be the most active in using GIS data in Swarm. See:
http://www.gis.usu.edu/swarm/index.html

I have only a bit of experience but:  GIS data are usually in a format
with 3 numbers per row: X, Y, value. It is very easy in Swarm to read
such files and create an object in a Swarm Grid2D object for each row. 

We have a code class that reads in a GIS file where the X and Y values
are UTM coordinates, does some transformations on the coordinates, and
creates a grid cell object in a Grid2d for each row of the GIS file. The
transformations are necessary because you want the Grid2D coordinates to
start at zero, and because Y coordinates increase south to north in UTM
but vice versa in Swarm's display classes. 

I'd be happy to send our code but I suspect Paul Box has something
similar and cleaner. 

Steve R.

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