David Megginson writes:
> 
> Arnt Karlsen wrote:
> 
> > ..has anyone played with the lower detail 30 arcsec SRTM Terrain 
> > data, _and_ the new higher detail 3 arcsec data,  _mixing_ the data, 
> > to try produce even higher detail than the 3 arcsec data?  
> > I mean, both data sets_are_ correct.
> 
> I'm not sure how you'd end up with higher-level detail.  For every 100 
> points in the 3 arcsec DEM, there will be one point in the 30 arcsec DEM, 
> presumably equal to the highest of the 100 points (but I'm not sure -- Norm 
> can probably fill us in).

the 30 sec SRTM is much better then the previous gtopo30 product which
it replaces.  However where available the 3 arc second product is better yet
except for the occasional hole.

Cheers

Norman

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