Works just like the time on a clock.  The smaller the distance (angle on
a sphere in this case), the greater the resolution.  Therefore, a 7.5
minute dem would have a greater resolution than a 15 minute, and a 2 arc
second would have even more.

-Mike

Denjor wrote:

> What exactly is the difference between the different types of dems?
> Resolution?  if so, which is the highest in res?
>     I'm talking about the 7.5 minute, or the 15 minute, or the 2 arc
> second, or the 1 arc second.

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