ASF Tools v0.4.1

Changed

• asf_tools.dem now uses the updated 2021 release of the Copernicus GLO-30 Public DEM

Fixed

• asf_tools.hand.calculate correctly uses pyshed's sGrid for calculating HAND across all hydrobasins simultaneously.
• asf_tools.hand.calculate will fill NaNs within the hydrobasins in the calculated HAND array with values interpolated from their neighbor's HOND (height of nearest drainage)
• asf_tools.flood_map.iteartive now produces more precise flood depth estimates by averaging water levels from a range of different initial guesses