Portland, ME 1/3 arc-second MHW DEM

The Portland DEM integrates bathymetry and topography in the area surrounding the town of Portland, Maine. It covers the coastal region from Portsmouth in the southwest to Boothbay Harbor to the north east and includes the communities Ogunquit, Wells, Old Orchard Beach, Yarmouth, Freeport, Phippsburg, and Bath. The DEM has a 1/3 arc-second (~10 meter) cell size, and is referenced to a vertical datum of mean high water. It was built in December 2008 to support NOAA's Tsunami Program.

No perspective image available
DEM perspective image. 

Name Portland
States Maine
Region East Coast
-70.74 -69.63
Date Completed 2008-12-31
Type Coastal Inundation
Horizontal Datum WGS 84
Projection Geographic (degrees)
Vertical Datum MHW (meters)
Vertical Transformation Source elevation data transformed vertically using constant offset.
Coverage Bathy-topo
Cell Size 1/3 arc-second
Registration Grid-node
Version 1
Source NOAA / NGDC / MGG
Developer NOAA / NGDC / MGG
Project NOAA Tsunami Inundation
Contact Barry W Eakins @ NOAA / NGDC
Position: not available


DEM Restrictions

WARNING: DEM not to be used for navigation.

How to cite this DEM

Lim, E., L.A. Taylor, B.W. Eakins, K.S. Carignan, R.R. Warnken, and P.R. Medley, 2009. Digital Elevation Model of Portland, Maine: Procedures, Data Sources and Analysis, NOAA Technical Memorandum NESDIS NGDC-30, Dept. of Commerce, Boulder, CO, 29 pp.
Questions or Comments: