> > Sorry for the lame question, but how far are the sample points apart from
> > each other in feet with the 3 arc second data?  How far is it for the 1?
>
> 1 arcsec = approximately 30 meters = approximately 100 feet.
> 3 arcsec = approximately 90 meters = approximately 300 feet.
>
> The points are on the lat/lon grid lines so the horizontal spacing
> becomes smaller as you get further away from the equator.
>

Thanks Curt.  Is it possible to use 1 arcsec data for small areas?  For
example, the Grand Canyon would look really cool with that kind of detail.

g.



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