Russell Towle wrote:
> 
> It is frustrating to be stuck in this nascent stage of mapping, when our
> data set is so limited. Right now, I think 7.5 minute DEMs, with 30 meters
> of horizontal resolution, and 1-meter vertical resolution, wonderful.
> 
> But I'd much rather have 1-meter-horizontal DEMs with elevations to the
> nearest centimeter. The shape of the earth is a wondrous thing. These
> higher-resolution data sets are on the way.

Actually there are 1/3 arc second DEMs available for most parts of the 
US.  But you won't get reasonable results if you convert them to 1 meter 
vertical resolution.

And for outside North America (especially Europe where high resolution 
data exists, just kept under lock by the mapping agencies) things look 
very bad.

Christoph

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