OMB Circular A-16

NSDI
OMB Circular A-16, revised August 19, 2002, is a Government circular that was created by the United States Office of Management and Budget (OMB) to provide guidance for federal agencies that create, maintain or use spatial data directly or indirectly through the establishment of the National Spatial Data Infrastructure (NSDI) and the Federal Geographic Data Committee (FGDC).wikipedia
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Spatial data infrastructure

SDIinfrastructure for spatial informationSpatial Data Infrastructure (SDI)
An example of an existing SDI, since 2002, is the NSDI created by the OMB Circular A-16 in the United States.

Government circular

circular letter
OMB Circular A-16, revised August 19, 2002, is a Government circular that was created by the United States Office of Management and Budget (OMB) to provide guidance for federal agencies that create, maintain or use spatial data directly or indirectly through the establishment of the National Spatial Data Infrastructure (NSDI) and the Federal Geographic Data Committee (FGDC).

Office of Management and Budget

United States Office of Management and BudgetBureau of the BudgetOMB
OMB Circular A-16, revised August 19, 2002, is a Government circular that was created by the United States Office of Management and Budget (OMB) to provide guidance for federal agencies that create, maintain or use spatial data directly or indirectly through the establishment of the National Spatial Data Infrastructure (NSDI) and the Federal Geographic Data Committee (FGDC).

Federal Emergency Management Agency

FEMAFederal Emergency Management Agency (FEMA)Administrator of the Federal Emergency Management Agency

Geoportal

The United States National Spatial Data Infrastructure (NSDI), started in 1994 (see OMB Circular A-16), is considered the earliest geoportal concept.

Federal Geographic Data Committee

FGDC
The FGDC coordinates the sharing of geographic data, maps, and online services through an online portal, geodata.gov, that searches metadata held within the NSDI Clearinghouse Network.