Title 10 U.S.C. Armed Forces, Chapter 22 - NGA
Provide geospatial intelligence consisting of: imagery, imagery intelligence, geospatial information; including geomatics maps, books, models, and datasets.
DODD 5105.60 National Geospatial-Intelligence Agency
Providing GEOINT for safety of navigation information preparing and distributing maps, charts, books, and geodetic products.
DODD 4650.05 Positioning, Navigation, and Timing
NGA will maintain the terrestrial reference frame standard for DoD
CJCSI 6130.01E Master Positioning, Navigation, Time Plan
NGA will define and maintain World Geodetic System 1984 (WGS 84)
CJCSI 3900.01C Position (Point and Area) Reference Procedures
NGA is the authority for WGS 84 map grids, map projections, and datum transformations.
CJCSI 3901.01 Requirements for Geospatial Information and Services
NGA shall provide geodetic sciences support (e.g. gravity modeling, Global Positioning System support, geodetic surveys geotechnical modeling, magnetic modeling, positional data World Geodetic System 84 realization, datum transformation parameters, and hand held GEOINT collection).