|
NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital
elevation models (DEMs) for select U.S. coastal regions in the Gulf of Mexico. These
integrated bathymetric-topographic DEMs were developed for NOAA Coastal Survey Development
Laboratory (CSDL) through the American Recovery and Reinvestment Act (ARRA) of 2009
to evaluate the utility of the Vertical Datum Transformation tool (VDatum), developed
jointly by NOAA's Office of Coast Survey (OCS), National Geodetic Survey (NGS), and
Center for Operational Oceanographic Products and Services (CO-OPS). Bathymetric,
topographic, and shoreline data used in DEM compilation are obtained from various
sources, including NGDC, the U.S. Coastal Services Center (CSC), the U.S. Office of
Coast Survey (OCS), the U.S. Army Corps of Engineers (USACE), and other federal, state,
and local government agencies, academic institutions, and private companies. DEMs
are referenced to the vertical tidal datum of North American Vertical Datum of 1988
(NAVD 88) or Mean High Water (MHW) and horizontal datum of North American Datum of
1983 (NAD 83). Cell size ranges from 1/3 arc-second (~10 meters) to 1 arc-second (~30
meters). The NOAA VDatum DEM Project was funded by the American Recovery and Reinvestment
Act (ARRA) of 2009 (http://www.recovery.gov/). |