National Transportation Analysis Regions (NTAR) divide the U.S. into 89 areas that delineate the functional geography transportation demand.
Purpose
NTARs are aggregates of the Bureau of Economic Analysis (BEA) Economic Areas and were defined by the DOT for use in the 1993 Commodity Flow Survey (CFS).
Temporal Extent
Currentness Reference
publication date
Time Instant
1995
Bounding Box
West
-179.149374
East
179.776407
North
71.382377
South
18.911254
ISO Topic Category
boundaries
economy
transportation
Theme Keyword
Economic zones
Transportation
Theme Keyword Thesaurus
LCSH
Place Keyword
United States
Territories and possessions
Place Keyword Thesaurus
LCSH
Temporal Keyword
Access Restrictions
None
Use Restrictions
Acknowledgment of the Bureau of Transportation Statistics National Transportation Atlas would be appreciated in products derived from these data.
For non-commercial use only.
Status
Complete
Maintenance and Update Frequency
As needed
Point of Contact
Contact Organization
Bureau of Transportation Statistics, USDOT
Delivery Point
400 Seventh Street, SW
Delivery Point
City
Washington
State
District of Columbia
Postal Code
20590
Country
USA
Contact Telephone
(202) 366-DATA
Contact Facsimile Telephone
(202) 366-3640
Credit
The dataset was compiled by the Bureau of Transportation Statistics from the NTAD county data set.
Native Data Set Environment
Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcCatalog 8.1.1.649
Collection
Originator
Bureau of Transportation Statistics
Publication Date
2001
Title
National Transportation Atlas Databases
Publication Information
Publication Place
Washinton, DC
Publisher
Bureau of Transportation Statistics
Data Quality Information
Lineage
Source
Originator
Bureau of Transportation Statistics
Publication Date
1995
Title
NTAD county database, BEA
Publication Information
Publication Place
Washington, DC
Publisher
Bureau of Transportation Statistics
Type of Source Media
CD-ROM
Source Temporal Extent
Time Period Information
Single Date/Time
Calendar Date
1996
Source Currentness Reference
publication date
Contribution
Spatial information for NTAR regions.
Spatial Data Organization Information
Direct Spatial Reference Method
Vector
Point and Vector Object Information
SDTS Terms Description
SDTS Point and Vector Object Type
GT-polygon composed of chains
Point and Vector Object Count
89
SDTS Terms Description
SDTS Point and Vector Object Type
Area chain
Point and Vector Object Count
13800
Spatial Reference Information
Horizontal Coordinate System Definition
Geographic
Latitude Resolution
0.000001
Longitude Resolution
0.000001
Geographic Coordinate Units
Decimal degrees
Geodetic Model
Horizontal Datum Name
North American Datum of 1983
Ellipsoid Name
Geodetic Reference System 80
Semi-major Axis
6378137.000000
Denominator of Flattening Ratio
298.257224
Vertical Coordinate System Definition
Altitude System Definition
Altitude Resolution
1.000000
Altitude Encoding Method
Explicit elevation coordinate included with horizontal coordinates
Entity and Attribute Information
Entity Type
Entity Type Label
SDE.NTADNTAR
Entity Type Definition
Shapefile
Entity Type Definition Source
ESRI
Attributes
VERSION
File version number
Definition Source
Assigned
REVISION
Record revision number
Definition Source
Assigned
MODDATE
Record Modification Date
Definition Source
Assigned
FEATURID
Unique identifier for the geographic entity - NTAR identifier
SHAPE
The SHAPE attribute is a data attribute inherent to the ESRI shapefile format. It defines the vector data as a point, polyline, or polygon. (Coordinates defining the features.)
Definition Source
ESRI and BTS
SHAPE.AREA
SHAPE.LEN
SHAPE.FID
Distribution Information
Format Name
SHAPE
Distributor
Harvard Geospatial Library
Online Access
hgl.harvard.edu
Name
Metadata Reference Information
Metadata Date
20020710
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization
Harvard Geospatial Library
Contact Person
Geospatial Resources Cataloger
Contact Address
Address
Office of Information Systems
Address
1280 Massachusetts Avenue
City
Cambridge
State or Province
MA
Postal Code
02138
Country
USA
Contact Voice Telephone
617-495-2417
Contact Facsimile Telephone
617-496-0440
Contact Electronic Mail Address
hgl_ref@hulmail.harvard.edu
Metadata Standard Name
FGDC Content Standards for Digital Geospatial Metadata
