| Title: "NTAD: National Highway Planning Network 2004.03 (line)" (2004) Description: The National Highway Planning Network is a comprehensive network database of the nation's major highway system. It consists of the nation's highways comprised of Rural Arterials, Urban Principal Arterials and all National Highway System routes. The data set covers the 48 contiguous States plus the District of Columbia, Alaska, Hawaii, and Puerto Rico. The nominal scale of the data set is 1:100,000 with a maximal positional error of ?80 meters. The primary purpose of this geospatial data set is to serve the FHWA needs in highway planning, policy analysis, visualization of the Highway Performance Monitoring System (HPMS) database and network modeling. The NHPN is the digital source used for coding and publishing the FHWA approved National Highway System maps. | ||||
| Keywords and Themes: | ||||
| Filename Prefix: nhpnlin | ||||
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| Mapped Drive Folder: /fedgov/bts/ntad04/polyline/nhpn/ | ||||
| Total size of data files: 139.23 MB | ||||
| Data Type: ESRI Shapefile | ||||
| Feature Type: Polyline | ||||
| Coordinate System: GCS_WGS_1984 | ||||
| Datum: D_WGS_1984 | Map Units: Decimal degrees | |||
Spatial Extent: United States | ||||
| Source Scale: The original elements of the NHPN have been conflated to the 1:100,000 DLG-3 data set, which maintains a nominal accuracy of at least ?80 meters. Where new roads have been added which are not in the DLG-3 database, link alignments have been digitized or converted from digital sources acquired from state DOTs with a map scale of at least 1:100,000. Where State data source was not available, CENSUS TIGER/Line 2000 was used. | ||||
Created by: Federal Highway Administration (FHWA) | ||||
| Released by: Bureau of Transportation Statistics (BTS) | ||||
| Content Date: 20040301 | ||||
| Published Date: 20040716 | ||||
Collection Name: National Transportation Atlas Databases (NTAD) 2004 | ||||
| Physical Location: Reference Gov. Docs. CD Cabinet | ||||
| Call Number: | ||||
| Acquired Date: 20040901 | ||||
| Distribution Restrictions: Public Domain | ||||
Note: The NHPN Version 2004.03 database, or any portion thereof, can be freely distributed as long as this metadata entry is included with each distribution. The original metadata entry cannot be modified or deleted from any data transfer. | ||||
Links to Metadata, Documentation, and Mapping:
Record ID: 2490_ntad04 | ||||
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