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Internatior
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ABSTRACT
Continental-scale to;
(SLA) experiment ai
approximately 1 km.
mean and standard
America, and Austre
vertical datum discre
confirms that raster ¢
Digital Elevation M
land topography at ;
recently become ava
distributed by Unite
the Geological Surv
Atmospheric and C
great utility in regic
topographic data ans
available global top
accuracy of these co
because the elevatio
numerous topograp
quality. Significant
disparate and poo:
datums; thus, the DI
representation of the
Profiling laser altii
provide the opportt
vertical accuracy in
(Harding et al., 19
suited to measuring
altimeters, because
have no difficulty ra
the optical backsc:
surface height dis
differentiate feature
canopy layers and
altimeter data lack :
DEM's with spatia.
utilising orbital st
However, they do |
the accuracy and