NGA Geomatics - Geosciences

Earth Science Modeling

NGA provides accurate, relevant geoscientific models and analysis in support of national security and intelligence objectives. We offer foundational environmental data as well as scientific analysis of the environment.

Geohazard Models: Natural hazards and environment modeling

NGA offers foundational environmental data as well as scientific analysis of the environment and natural hazards, on both global and regional scales.

Global geohazard potentials and indications:

Landslide
Flooding
Wildfire
Seismic Liquifaction

Regional or Ad-hoc Analysis:

Regional version of global models
Disease (e.g. ebola)
Food security
Crisis support

TDX-Hydro

TanDEM-X Hydro (TDX-Hydro) is a hydrography data suite with a nominal 12m resolution. TDX-Hydro uses TanDEM-X data as an initial input. TDX-Hydro was produced by applying a custom hydrologic conditioning process that reduces the effects of vegetation and spurious noise, uses existing datasets to encourage correct stream placement, and adjusts the surface to allow for continuous downslope flow. Global streams and basins were then derived from the conditioned DEM. TDX-Hydro datasets do not currently cover Antarctica.
The hydrography datasets are organized by continent and basin ID numbers. A shapefile corresponding to the basin ID numbers is located in the top-level directory.
For further questions and issues, contact NGA Geoscience Division at SFNAGGeoscienceApplications@nga.mil

Get TDX-Hydro data

Deflection of the Vertical (DOV)

NGA provides worldwide gravity compensation data in support of U.S. military operations, mission planning, and safety of navigation. The 2 by 2 arc-minute spaced deflection of the vertical (DOV) is provided globally in terms of north-south and east-west components, with error estimates included. The unit of measurement is arc-seconds. This global coverage is repeated for a range of altitudes from 0 to 90,000 feet above mean sea level. This data is essential to the accuracy and effectiveness of high order inertial navigation systems (INS). It aids in the reduction of position and velocity error and improves orientation control when introduced into the INS solution. Deflection of the vertical (DOV) data is made available through the Defense Logistics Agency.

Arctic Gravity Project

The Arctic Gravity Project (ArcGP) is an international effort dedicated to the compilation of a public-domain gravity grid of the Arctic gravity field north of 64° N. The focus of the gravity grid is the Arctic Ocean, Greenland, and the continental areas of North America and Russia north of 64° N. This international effort is being led by Rene Forsberg of the Technical University of Denmark and NGA of the USA, who were initially supported by a Special Working Group composed of members from ten different countries (USA, Canada, Sweden, Finland, England, Norway, Germany, Iceland, Russia, and France). The primary interest of the ArcGP is the compilation of state-of-the-art detailed free-air grids and was first made available to the general public in the year 2000 and updated in 2008. Historical information on the project, including previous grids and workshop/meeting minutes, are available on request. Please contact the Office of Geomatics with comments, suggestions, and feedback.

Arctic Gravity Project

FILE/LINK	DESCRIPTION
Arctic Gravity Project (2.4MB)	Zip archive containing Arctic Gravity Project data and documentation.

TDX-Hydro

VECTOR RIVER NETWORKS AND DRAINAGE BASINS
TDX-Hydro Technical Document
TDX-Hydro Data License
Basin GeoJSON File with ID Numbers
Africa 1020000010 Drainage Basins Stream Network 1020011530 Drainage Basins Stream Network 1020018110 Drainage Basins Stream Network 1020021940 Drainage Basins Stream Network 1020027430 Drainage Basins Stream Network 1020034170 Drainage Basins Stream Network 1020035180 Drainage Basins Stream Network 1020040190 Drainage Basins Stream Network	Europe 2020000010 Drainage Basins Stream Network 2020003440 Drainage Basins Stream Network 2020018240 Drainage Basins Stream Network 2020024230 Drainage Basins Stream Network 2020033490 Drainage Basins Stream Network 2020041390 Drainage Basins Stream Network 2020057170 Drainage Basins Stream Network 2020065840 Drainage Basins Stream Network 2020071190 Drainage Basins Stream Network	Siberia 3020000010 Drainage Basins Stream Network 3020003790 Drainage Basins Stream Network 3020005240 Drainage Basins Stream Network 3020008670 Drainage Basins Stream Network 3020009320 Drainage Basins Stream Network 3020024310 Drainage Basins Stream Network	Asia 4020000010 Drainage Basins Stream Network 4020006940 Drainage Basins Stream Network 4020015090 Drainage Basins Stream Network 4020024190 Drainage Basins Stream Network 4020034510 Drainage Basins Stream Network 4020050210 Drainage Basins Stream Network 4020050220 Drainage Basins Stream Network 4020050290 Drainage Basins Stream Network 4020050470 Drainage Basins Stream Network	Australia 5020000010 Drainage Basins Stream Network 5020015660 Drainage Basins Stream Network 5020037270 Drainage Basins Stream Network 5020049720 Drainage Basins Stream Network 5020054880 Drainage Basins Stream Network 5020055870 Drainage Basins Stream Network 5020082270 Drainage Basins Stream Network
South America 6020000010 Drainage Basins Stream Network 6020006540 Drainage Basins Stream Network 6020008320 Drainage Basins Stream Network 6020014330 Drainage Basins Stream Network 6020017370 Drainage Basins Stream Network 6020021870 Drainage Basins Stream Network 6020029280 Drainage Basins Stream Network	North America 7020000010 Drainage Basins Stream Network 7020014250 Drainage Basins Stream Network 7020021430 Drainage Basins Stream Network 7020024600 Drainage Basins Stream Network 7020038340 Drainage Basins Stream Network 7020046750 Drainage Basins Stream Network 7020047840 Drainage Basins Stream Network 7020065090 Drainage Basins Stream Network	Arctic of North America 8020000010 Drainage Basins Stream Network 8020008900 Drainage Basins Stream Network 8020010700 Drainage Basins Stream Network 8020020760 Drainage Basins Stream Network 8020022890 Drainage Basins Stream Network 8020032840 Drainage Basins Stream Network 8020044560 Drainage Basins Stream Network	Greenland 9020000010 Drainage Basins Stream Network