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Digital Elevation Model (DEM) of Northern Atlantic Coastal Plain topography and bathymetry with a horizontal resolution of 100 feet and vertical unit of 1 integer foot


Publication Date
Date Collected


Pope, J.P., Andreasen, D.C., McFarland, E.R., and Watt, M.K., 2016, Digital elevations and extents of regional hydrogeologic units in the Northern Atlantic Coastal Plain aquifer system from Long Island, New York, to North Carolina (ver. 1.1, January 2021): U.S. Geological Survey data release,


This digital elevation model (DEM) for the Northern Atlantic Coastal Plain (NACP) from Long Island New York to northeastern North Carolina represents the elevation of the topographic and bathymetric surface at a uniform horizontal grid spacing of 100 feet and vertical units of 1 (integer) foot. The land-surface elevations are derived from U.S. Geological Survey 30-meter National Elevation Dataset (NED), and the bathymetric elevations are derived from 3 arc-second (90-meter-nominal) National Oceanic and Atmospheric Administration (NOAA) U.S. Coastal Relief Model (CRM). Horizontal coordinates are referenced to the North American Datum of 1983 (NAD 83) and vertical measurements are referenced to the North American Vertical Datum of 1988 [...]


Attached Files

Click on title to download individual files attached to this item.
“DEM Raster GRID file”
95.15 MB application/zip
“DEM ASCII file”
125.47 MB application/zip
“NACP DEM Image”
thumbnail 8.45 MB image/jpeg
“Extent Polygon for Data”
54.65 KB application/zip


This dataset was assembled to provide a consistent model of the land surface and estuary-/bay-/sea-bottom surface to represent the upper limit of the NACP aquifer system from its western limit in the Fall Zone to the edge of the Atlantic continental shelf in the east, and from Long Island New York in the north to the Pamlico River and Pamlico Sound of North Carolina in the south. It may be useful for other applications requiring a digital elevation model continuous over this large area and continuous across the onshore (emergent) and offshore (submerged) extent of the NACP.

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