Marine Geoscience Data System

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GeoMapApp is an earth science exploration and visualization application that is continually being expanded as part of the Marine Geoscience Data System (MGDS) at the Lamont-Doherty Earth Observatory of Columbia University. The application provides direct access to the Global Multi-Resolution Topography (GMRT) compilation that hosts high resolution (~100 m node spacing) bathymetry from multibeam data for ocean areas and ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) and NED (National Elevation Dataset) topography datasets for the global land masses.

Current GeoMapApp version is 3.6.8 (Released April 26, 2018. Older versions are here.)


The application runs in the Windows, Mac OS X, Linux and Unix/Solaris operating systems using Java.

Use the Download Links on the left to read detailed requirements and to install the application.

If you experience problems installing GeoMapApp, troubleshooting help is available here.

Alternatively, if you are unable to install the application but have a Java-enabled browser, click here to launch GeoMapApp using Java WebStart (?).

Learn More About GeoMapApp

To learn more about GeoMapApp take a look at our Video Tutorials, view our GeoMapApp Announcements, or our Development History pages.

Visit the GeoMapApp User Forum to post questions and comments and to share knowledge with others.

Click Here for more information on how to cite GeoMapApp.

Join our Mailing List

Please subscribe to the GeoMapApp announce-list, a moderated forum where the GeoMapApp developers will post release information and critical updates. View our archive on past GeoMapApp announcements.

On April 26, 2018, we welcomed our 1,259th subscriber!


GeoMapApp relies on the internet to access a rich content of information for physical oceanography, paleoclimates, geochemistry, geology, seabed sediment and rock compositions, ocean crust age, spreading rates, bathymetry, and sediment thickness. One can select and view seismic reflection, gravity, magnetic and topographic profiles from tens of millions of kilometers of ocean surveys dating back to the 1960s. There are dedicated interfaces to explore the results of 40 years of ocean floor drilling, earthquake locations, magnitudes and epicenter depths, and seabed photographs from submersibles, remotely operated vehicles and towed camera sleds. The image in the map window can be saved or sent directly to a printer. Tabular datasets are selectable with lasso tools and can be manipulated in interactive graphs. Gridded datasets can be sun-shaded from selected directions and illumination angles then contoured. Users may import grids and tables from their own file system as well as from Web Mapping and Web Feature Services and take advantage all of the visualization capability of the application.

A summary of GeoMapApp updates is here. To learn more, view our Development History section.

Upon startup, there are choices of Mercator, North polar or South polar projections for the map window. Our Virtual Ocean application offers additional visualization on the surface of a rotating 3-D virtual globe with tilting to enhance the vertical exaggeration.