GeoMapApp 3.0 and GMRT 2.0 released

01-20-2011
GeoMapApp 3.0 provides access to  a major upgrade to the base topography
dataset accessible through GeoMapApp to include the GMRT 2.0, with greatly
expanded coverage in the oceans, and the ASTER and NED topography datasets for
the global land masses. The ASTER GDEM topography dataset (Japan METI/NASA),
provides 30 m resolution for the continents from 83°S to 83°N and replaces the
SRTM dataset used in prior GeoMapApp releases. For North America, the even
higher resolution NED dataset (USGS) is now accessible, providing topography
of the continental U.S. to 10 m resolution.

For the oceans, the GMRT v2.0 synthesis includes bathymetric coverage to 100 m
resolution from multibeam bathymetry mapping expeditions and regional gridded
compilations from a number of areas and international sources. New data
coverage over GMRT 1.0 is focused in the Atlantic and central Pacific with
over 100 expeditions added since the prior release. In addition, GMRT v2.0
includes a new 50 m grid resolution layer for the continental shelves and
other ocean areas where native resolution of the available sonar data is
sufficient. The high resolution bathymetry are merged with the Smith and
Sandwell v12.1 global topography compilation, the IBCAO v2.23 for the Arctic,
and the BedMap Subglacial Topographic Model of the Antarctic.
 
For more info see: http://www.marine-geo.org/about/news.php