| NOAA?s National Centers for Environmental Information (NCEI) is developing a suite
of digital elevation models (DEMs) for the U.S. coast to support a variety of NOAA
missions, including improved inundation modeling and mapping, habitat characterization,
and visualization of Earth?s surface. The DEMs are being developed according to a
0.25 degree tiling scheme. The spatial resolution of the tiles "telescopes" from the
coastal zone to the deep ocean floor at 1/9, 1/3, and 3 arc-second grid resolution.
Only the 1/9 arc-second DEM tiles integrate both bathymetric and topographic data;
all other resolutions map bathymetry only. The tiling of the DEMs facilitates targeted,
rapid updates as new coastal and marine elevation data are acquired and become available.
Bathymetric and topographic data utilized for DEM creation originate from a variety
of sources, including (but not limited to) the NOAA Office of Coast Survey, NOAA National
Geodetic Survey, NOAA Office for Coastal Management, U.S. Geological Survey, and the
U.S. Army Corps of Engineers. |