Homeland Security Geospatial Information Act of 2004 - Amends the Homeland Security Act of 2002 to establish within the Office of the Chief Information Officer of the Department of Homeland Security the Office of Geospatial Management. Requires the Geospatial Information Officer to: (1) manage the geospatial information needs and activities of the Department; (2) design and implement comprehensive geospatial initiatives for homeland security purposes, including grants for data creation and information sharing agreements with State and local governments; and (3) coordinate and use geospatial information, in cooperation with the Federal Geographic Data Committee, for the use and enhancement of the national spatial data infrastructure for homeland security purposes.
Requires that the Intergovernmental Board of Directors of the Geospatial One Stop Project include the Department as a member. Designates the Geospatial Information Officer as the Department's representative.