Mid-Atlantic Region Bathymetry

Coastal Relief Model data for the Mid-Atlantic region were downloaded from the NOAA/NCEI Grid Extract viewer. Elevations less than 0 were extracted and the dataset was projected to Web Mercator Auxiliary Sphere. Similarly, bathymetry data from CCOM-JHC for the U.S. Atlantic Continental Margin were downloaded and projected. The Mosaic to New Raster tool in ArcGIS was used to merge these two datasets, with the CCOM-JHC data taking precedence where there was overlap. In a few very small areas not covered by either dataset, NOAA's ETOPO1 data was incorporated. The Extract by Mask tool in ArcGIS was then used to "clip" the raster data to the EEZ boundary.