Processing steps
Processing steps involved in the construction of an Antarctic bed elevation DTM
BEDMAP Ice thickness Database
Ice free ground (Map/survey data)
e.g. coastlines, shelf outlines, grounding lines
glacier/ice stream margins
Data validation, Quality Assurance
Error evaluation, filtering
Preprocessing, vector-point
Preprocessing, vector-point data type conversion
(IDW, Kriging, TIN Quintic)
BEDMAP Ice thickness Database
e.g. coastlines, shelf outlines, grounding lines
Extract depth to bed under ice shelves from fields
ice thickness and watercolumn where available.
Preprocessing, vector-point
Preprocessing, vector-point data type conversion
SUB ICE SHELF & MARINE BED ELEVATION DTM
(IDW, Kriging, TIN Quintic)
(elevation - ice_thickness)
TERRESTRIAL BED ELEVATION DTM
Sub ice shelf & marine DTM
ANTARCTIC BED ELEVATION DTM