Fort Belvoir North Area Along the Fairfax County Parkway in Springfield, Fort Belvoir North Area is home to the National Geospatial Intelligence Agency (NGA). The 2.4 million square foot facility includes a main office building, technology center, central utility plant, visitor control center, and remote inspection facility. The National Geospatial Intelligence Agency is the nation's primary source of geospatial intelligence, or GEOINT. As a Department of Defense combat support agency and a member of the U.S. Intelligence Community, NGA creates GEOINT using remotely sensed data, physical geography, land cover and cultural data collected by a myriad of sources to help its mission partners visualize and understand the world. NGA provides GEOINT data and analytical services to support safety of navigation on land, air and sea. Joint-Use IntelligenceAnalysis Facility A 170,500 square foot facility in Charlottesville, Va., provides enhanced capabilities to the Defense Intelligence Agency and its partners in the intelligence community. Some services provided include intelligence analysis functions, information technology, security, and logistics. The Joint-Use Intelligence Analysis Facility includes a new access control point and visitor center. Mark Center Fort Belvoir now includes property at Seminary Road in Alexandria. A 1.8 million square foot facility known as the Mark Center provides facilities for Department of Defense (DoD) personnel who previously occupied leased space elsewhere in the National Capital Region. The facility includes two multi-story office towers, a public transportation center, and ancillary facilities. Most of the organizations located at Mark Center are known collectively as Washington Headquarters Service.