The Reference Elevation Model of Antarctica
2018
Abstract. The Reference Elevation Model of Antarctica (REMA) is the
first continental-scale digital elevation model (DEM) at a resolution of
less than 10 m. REMA is created from stereophotogrammetry with submeter
resolution optical, commercial satellite imagery. The higher spatial and
radiometric resolutions of this imagery enable high-quality surface
extraction over the low-contrast ice sheet surface. The DEMs are registered
to satellite radar and laser altimetry and are mosaicked to provide a
continuous surface covering nearly 95 % the entire continent. The mosaic
includes an error estimate and a time stamp, enabling change measurement.
Typical elevation errors are less than 1 m, as validated by the
comparison to airborne laser altimetry. REMA provides a powerful new
resource for Antarctic science and provides a proof of concept for
generating accurate high-resolution repeat topography at continental
scales.
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