Tim,
Perhaps not so odd. I vaguely remember something about topo data being projected
onto a plane and DEM data following the curve of the earth. There are also a
couple of standards for representation of DEM data which differ. Maybe someone
who really knows will enlighten us.
Regards, Bill P.
>
> oddly, the topographic map doesn't match up with the
> DEM and has to be extensively compensated for distortion
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