Update for NASA IceBridge L4 Bathymetry Data

On 11 February 2015, Version 1 of the NASA IceBridge Sander AIRGrav L4 Bathymetry data set was updated to Version 1.1. In V1.1 the precision for lat and lon values in data file IGBTH4_20140207.csv is increased to 6 decimal places. This data set contains bathymetry of Arctic fjords and Antarctic ice shelves based on measurements from the Sander Geophysics Airborne Inertially Referenced Gravimeter (AIRGrav) system. For further information and to access the data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), see the IceBridge L4 Bathymetry landing page.