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