Bathymetric and elevation data are fundamental, first-order observations necessary for all geological and geophysical mapping exercises. For the NAG- TEC project, we compiled all the information available and constructed a 500×500 m grid for the Atlas area. Chapter 1 documents the data sets and resolution that the new grid is based on and presents a residual bathymetry map of the region based on the crustal age model from Chapter 5 and sediment thickness model from Chapter 6.