FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2004
TITLE: 2001 NATIONAL TRANSPORTATION ANALYSIS REGIONS
Geodataset Name: NTAR Geodataset Type: SHAPE Geodataset Feature: POLYGON
GENERAL DESCRIPTION:
This dataset contains National Transportation Analysis Regions (NTAR) of Florida. These regions delineate the functional geography transportation demand.
DATA SOURCE(S): Geospatial Data 2001 National Transportation Atlas Data SCALE OF ORIGINAL SOURCE MAPS: 100,000 DATE OF AUTOMATION OR SOURCE: 2001 GEODATASET EXTENT: State of Florida 
FEATURE ATTRIBUTE TABLES:
Datafile Name: NTAR.DBF ITEM NAME WIDTH TYPE PRECISION SHAPE 8 SHAPEPOLY 0 MODDATE 8 DECIMAL 0 FEATURE_ID 10 DECIMAL 0 AREA 16 DECIMAL 3 PERIMETER 16 DECIMAL 3 ACRES 16 DECIMAL 3 HECTARES 16 DECIMAL 3 
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
ITEM ITEM DESCRIPTION SHAPE Data attribute inherent to the ESRI shapefile format, which defines the data as a point, polyline, or polygon. VERSION File version number REVISION Record revision number MODDATE Record Modification Date FEATURID Unique identifier for the geographic entity - NTAR identifier AREA Area in square meters PERIMETER Perimeter in meters ACRES Area in acres HECTARES Area in hectares 
USER NOTES:
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). The dataset was compiled by the Bureau of Transportation Statistics from the NTAD county data set. 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). Adjoining counties which comprise the NTAR regions were merged into unique polygons. After completing topological and attribute verification using ARC/INFO, the data was converted to shapefile format. The dataset provides location and attribute information for use in national and regional cartographic and network analysis applications. Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modelling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:250000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analyses. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our web pages at: http://www.geoplan.ufl.edu/education.html 
FGDL QUALITY ASSURANCE STATUS:
-Reprojected data to FGDL Albers HPGN (See "Map Projection Parameters" below) -Area and Perimeter were updated to meters 
REFERENCES:
Bureau of Transportation Statistics 2001 National Transportation Atlas Data 
DATA LINEAGE SUMMARY:
This dataset was downloaded in shapefile format by the GeoPlan Center from the Bureau of Transportation Statistics website http://199.79.179.77/gis/ntatlas/natlas.html in 2001. The dataset was projected to FGDL Albers HARN and area and perimeter were updated to meters. 
MAP PROJECTION PARAMETERS:
Projection ALBERS Units METERS Datum HPGN Spheroid GRS1980 1st standard parallel 24 0 0.000 2nd standard parallel 31 30 0.000 central meridian -84 0 0.000 latitude of projection's origin 24 0 0.000 false easting (meters) 400000.00000 false northing (meters) 0.00000 
DATA SOURCES CONTACT(S):
Name: Bureau of Transportation Statistics Abbr.name: BTS Address: 400 Seventh Street, SW Washingtion DC 20590 Name: Bureau of Transportation Statistics Abbr.name: BTS Address: 400 Seventh Street, SW Washingtion DC 20590 Phone: 202-366-DATA Web site: http://199.79.179.77/gis/ntatlas/natlas.html
FGDL CONTACT:
Name: Florida Geographic Data Library Abbr. Name: FGDL Address: Florida Geographic Data Library 431 Architecture PO Box 115706 Gainesville, FL 32611-5706 Web site: http://www.fgdl.org Contact FGDL: Technical Support: http://www.fgdl.org/fgdlfeed.html FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html For FGDL Software: http://www.fgdl.org/software.html