Point Data Sets

Airports

datum: North American Datum 1983 Ellipsoid: GRS 80

Public Use Airports - Landing facilities in the United States, 1998. The attribute files were reformatted and realigned to group ‘like’ information. Where the old unique identifier (from the 1997 version) does not match any unique identifier in the new FAA NFDC file, additional information may not exist in the attribute files.

Amtrak Stations

datum: North American Datum 1983 Ellipsoid: GRS 80

Amtrak Stations/railway terminals, 1998. Many new features exist in this version. A number of different attribute fields exist in this version.

Intermodal terminals

datum: North American Datum 1983 Ellipsoid: GRS 80

Intermodal Terminals, 1998

Place90

datum: North American Datum 1983 Ellipsoid: GRS 80

Place Name Point File - Place Locations from the 1990 Census Master Area Reference File. The State FIPS Code and Place FIPS Codes are concatenated to create a single unique field for linking the attribute with the spatial object.

Ports

datum: North American Datum 1983 Ellipsoid: GRS 80

US Army Corps of Engineers Ports, extracted from the Waterway Network, 1998. Ports were extracted from the waterway network where the PORT code contained a ‘C’ or ‘c’ as the leading character. There are 224 records that met this condition.

Line Data Sets

National Highway Planning Network

datum: North American Datum 1983 Ellipsoid: GRS 80

National Highway Planning Network, Version 2.2 (1:100,000 base scale) Data provided and maintained by the Federal Highway Administration (FHWA), 1998

Rail Network 1:100,000 Scale

datum: North American Datum 1983 Ellipsoid: GRS 80

Railway Network (1:100,000 base scale), Data provided and maintained by the Federal Railroad Administration, 1998. This is an entirely different version than supplied in previous versions of the NTAD. This rail network was extracted from TIGER/Line files to allow for better matching of road/rail intersections.

Rail Network 1:2,000,000 Scale

datum: North American Datum 1983 Ellipsoid: GRS 80

Railway Network (1:2,000,000 base scale) Data provided and maintained by the Federal Railroad Administration, 1998

Runways

datum: North American Datum 1983 Ellipsoid: GRS 80

Runways associated with the Public Use Airports, 1998. Many coincident lines were eliminated in this version. The attribute files were reformatted and attributes realigned to group ‘like’ information.

Transit Data Set

datum: North American Datum 1983 Ellipsoid: GRS 80

Fixed Guideway Transit Network plus High Occupancy Vehicle Roadways, 1997

Waterway Network

datum: North American Datum 1983 Ellipsoid: GRS 80

U.S. Army Corps of Engineers Navigable Waterway Network, version 2.2, 1998.

Polygon Data Sets

Bureau of Economic Areas

datum: North American Datum 1983 Ellipsoid: GRS 80

Bureau of Economic Analysis, Economic Areas

Park

datum: North American Datum 1983 Ellipsoid: GRS 80

The State FIPS Code and Park Abbreviation fields are concatenated in this version to allow linkage of attributes to the spatial object through a single field. Previous versions required linking the two separate fields: STFIPS and Park abbreviation.

County

datum: North American Datum 1983 Ellipsoid: GRS 80

U.S. Counties with integrated shoreline (1:100,000 base scale)

CD105

The 105th Congressional Districts (1:100,000 base scale)

CD106

The 106th Congressional Districts (1:100,000 base scale)

State

datum: North American Datum 1983 Ellipsoid: GRS 80

U.S. State boundaries with integrated shoreline (1:100,000 base scale)

Metropolitan Statistical Areas

datum: North American Datum 1983 Ellipsoid: GRS 80

Metropolitan Statistical Areas (1:100,000 base scale), 1992

Military Bases

New to the 1999 NTAD. datum: North American Datum 1983 Ellipsoid: GRS 80

FHWA Urbanized Areas

datum: North American Datum 1983 Ellipsoid: GRS 80

Federally Adjusted Urbanized Areas (1:100,000 base scale) Data provided and maintained by the Federal Highway Administration (FHWA), 1995

BOC Urbanized reas

datum: North American Datum 1983 Ellipsoid: GRS 80

Bureau of the Census Urbanized Areas (1:100,000 base scale) Data provided and maintained by the Bureau of the Census, 1996