MEaSUREs BedMachine Antarctica, Version 4

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, contains a bed topography and bathymetry map of Antarctica. Bed topography is deduced by subtracting ice thickness from the surface elevation, using Ice Flow Perturbation Analysis (IFPA), and by other methods. Surface elevations are obtained from the Reference Elevation Model of Antarctica (REMA) and high-resolution satellite maps.