FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2004

TITLE: NATIONAL HIGHWAY PLANNING NETWORK

Geodataset Name:      NHPN
Geodataset Type:      SHAPE
Geodataset Feature:   LINE

GENERAL DESCRIPTION:

This dataset contains a comprehensive network database of the 
nation's major highway system.  It consists of over 400,000 miles 
of the nation's highways, comprised of Rural Arterials, Urban 
Principal Arterials and all National Highway System routes. 
DATA SOURCE(S):                   National Transportation Service
SCALE OF ORIGINAL SOURCE MAPS:    1:100,000
DATE OF AUTOMATION OR SOURCE:     2001
GEODATASET EXTENT:                State of Florida

FEATURE ATTRIBUTE TABLES:
Datafile Name: NHPN.DBF

ITEM NAME       WIDTH     TYPE      PRECISION
Shape              9     SHAPELINE      0         
Version            2     CHARACTER      0         
Revision          19     CHARACTER      0         
Moddate           19     DECIMAL        11        
Featurid          35     DECIMAL        11        
Source             2     CHARACTER      0         
Stfips             3     CHARACTER      0         
Ctfips            11     CHARACTER      0         
Lgurb             11     DECIMAL        0         
Smurb              6     DECIMAL        0         
Sign1              6     CHARACTER      0         
Signt1             1     CHARACTER      0         
Signn1             4     CHARACTER      0         
Signq1             1     CHARACTER      0         
Sign2              6     CHARACTER      0         
Signt2             1     CHARACTER      0
Signn2             4     CHARACTER      0         
Signq2             1     CHARACTER      0         
Sign3              6     CHARACTER      0         
Signt3             1     CHARACTER      0         
Signn3             4     CHARACTER      0         
Signq3             1     CHARACTER      0         
Miles             15     DECIMAL        2         
Km                15     DECIMAL        2         
Factype           11     DECIMAL        0         
Toll              11     DECIMAL        0         
Lanes             11     DECIMAL        0         
Acontrol          11     DECIMAL        0         
Median            11     DECIMAL        0         
Surface           11     DECIMAL        0         
Fclass            11     DECIMAL        0         
Aclass             1     CHARACTER      0         
Rucode            11     DECIMAL        0         
Status            11     DECIMAL        0         
Nhs               11     DECIMAL        0         
Strahnet          11     DECIMAL        0         
Transam           11     DECIMAL        0         
Specsyst          11     DECIMAL        0         
Length            16     DECIMAL        3
DESCRIPT           6     CHARACTER      0

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                     The VERSION is a 2-digit number that will be  
                            incremented for all records in the database whenever a  
                            new release is distributed. In this release the value 
                            is 03
           
Revision                    The REVISION is a 2-digit number that will be 
                            incremented individually for each record whenever a 
                            change is made to one of its fields.  (Revision numbers 
                            will not be reset with each new release.)  In this 
                            release the value is 00.

Moddate                     The MODDATE (or modification date) indicates when each 
                            record in the database was last changed.  As changes 
                            are made to a record, the modification date is entered 
                            in the format 'yyyymmdd'.   

Featurid                    Unique line identifier         

Source                      The Source Flag is used to identify the original  
                            source of the coordinate information.
                            	S State Supplied Digital Data
                            	U USGS Digital Line Graphs
             
Stfips                      Two character State FIPS Code              

Ctfips                      Three digit County FIPS Code           

Lgurb                       Large Urbanized Area            

Smurb                       Adjusted Small Urban Area              

Sign1                       Primary Sign Route. Composite field of SIGNT1, SIGNN1,  
                            and SIGNQ1 Note: The SIGNT1 field is followed by a left-
                            adjusted sign route number (SIGNN1)for the route. The   
                            SIGNR field can contain alpha characters to allow for 
                            actual sign route numbers such as route A1A in Florida. 
                            Using HPMS standards, an optional directional 
                            indicator (N, S, E, W) can also be used as part of the 
                            SIGNN1 field. The Sign Route Number is followed by an 
                            optional Sign Route Qualifier Record (SIGNQ1) which is 
                            used to qualify the sign route description
             
Signt1                      Subfield of SIGN1            
                            	I Interstat
                            	U US Route
                            	S State Route
                            	C County Route
                            	N None of the above
                     
Signn1                      Subfield of SIGN1             

Signq1                      No qualifier, not signed, or not applicable            
                            	A Alternate Route
                            	B Business Route
                            	S Spur
    
Sign2                       Alternate Sign Route. Composite Field containing   
                            SIGNT2, SIGNN2, and SIGNQ2
             
Signt2                      Subfield of SIGN2
                            	U US Route
                            	S State Route
                            	C County Route

Signn2                      Subfield of SIGN2            

Signq2                      Subfield of SIGN2
                            	A Alternate Route

Sign3                       Alternate Sign Route. Composite Field containing
                            SIGNT3, SIGNN3, and SIGNQ3        

Signt3                      Subfield of SIGN3            
                            	U US Route
                            	S State Route
                            	C County Route
                           
Signn3                      Domain is too large to enumerate          

Signq3                      Subield of SIGN3         
                            	A Alternate Route

Miles                       An accurate measurement in miles for the link chain.
                            Contains two (2) implied decimal places and is   
                            calculated from the link chain           

Km                          An accurate measurement in kilometers for the link
                            chain. Contains two (2) implied decimal places and is 
                            calculated from the MILES field            

Factype                     Describes the permissible flow of traffic over the link    
                            	1 One-way flow
                            	2 Bi-directional flow
                            	
Toll                        Identifies links which have one or more toll features
                            associated with travel along the link
                            	0 Not a toll road
                            	1 Toll road
Lanes			    Identified number of lanes on road

Acontrol                    Describes the degree of access control to the link
                            from adjoining roads Note: Classification of Access 
                            Control should be consistent with HPMS GGuidelines                
                            	0 Unknown
                            	1 Full access control
                            	2 Partial access control
                            	3 No access control

Median                      Describes the type of median                     
                            	0 Unknown
                            	1 Divided highway
                            	2 Undivided highway
                            	
Surface                     Identifies the predominant surface type on the link      
                            	0 Unknown
                            	1 Paved
                            	2 Unpaved
                            	3 Ferry

Fclass                      Identifies the assigned functional class of each
                            link. The Functional Class represents the assigned 
                            classification from the 1992 Functional 
                            Reclassification by State agencies         
                            	00 Unknown
                            	01 Rural Interstate
                            	02 Rural Principal Aterial
                            	06 Rural Minor Arterial
                            	11 Urban Interstate
                            	12 Urban Freeway or Expressway
                            	14 Urban Principal Arterial
                            	16 Urban Minor Arterial

Aclass                      Administrative class associated with the link
                            (Federal Aid System)          
                            	I Federal-Aid Interstate
                            	P Federal-Aid Primary
                            	S Federal-Aid Secondary

Rucode                      Rural/Urban classification           
                            	1 Rural
                            	2 Small Urban (1990 pop 5,000-49,999)
                            	3 Large Urban (1990 pop > 49,999)

Status                      Describes availability of the link to through traffic          
                            	0 Proposed/Under construction
                            	1 Open to traffic
Nhs                         Special subnetwork for the proposed National Highway
                            System Note: The definition of the complete ISTEA High
                            Priority Corridor subnetwork can be made by selecting  
                            NHPN  links that have a NHS value of 2, 5, or 6             
                            	0 Not on NHS
                            	1 Interstate
                            	2 ISTEA High Priority Corridor
                            	3 Non-Interstate STRAHNET
                            	4 STRAHNET Connector
                            	5 ISTEA High Priority Corridor/ Non-Interstate STRAHNET
                            	6 ISTEA High Priority Corridor/ STRAHNET Connector
                            	7 Other NHS
                            	8 Unknown
                            	9 Unknown


Strahnet                    Special subnetwork for the Strategic Highway Corridor
                            Network         
                            	0 Not on STRAHNET
                            	1 Non-Interstate STRAHNET link
                            	2 STRAHNET Priority 1 Connector
                            	3 STRAHNET Priority 2 Connector
                            	4 STRAHNET Priority 3 Connector
                            	5 Temporary STRAHNET Route

Transam                     Special subnetwork for the TransAmerica corridor
                            Notes:  The TRANSAM field describes a representation  
                            of what the Trans-America corridor could look like. At 
                            the time of documentation no Trans-America corridor 
                            has been defined.  The definition of the represented 
                            corridor is due to Bruce Peterson, Oak Ridge National 
                            Laboratory          
                            	0 Not on the Trans-America corridor
                            	1 Trans-America corridor link

Specsyst                    Flag for special projects within the FHWA used to
                            define networks for special analysis purposes.  

Length                      Length of feature in meters
Descript                    FGDL added item based on Sign1 

USER NOTES:

The NHPN Version 3.0 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.
(http://websas.bts.gov/website/ntad/metadata/nhpn.htm)
The National Highway Planning Network is a comprehensive network database of the 
nation's major highway system.  It consists of over 400,000 miles 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 accuracy of the fields FCLASS and STRAHNET from the description section of 
the line shapefile is consistent with State supplied information for the years 
1992 and 1993. The accuracy of the fields MILES, KM, SIGN1, and NHS from the 
description section of the line shapefile is consistent with State supplied 
information for the years 1992 through 2001. All other attributes in the 
description of the link table are unverified.  
The dataset provides location and attribute information for use in national and 
regional cartographic and network analysis applications.
A note concerning data scale: 

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:

-Projected data to FGDL Albers HPGN (See "Map Projection Parameters" below).
-Clipped to the State of Florida
-DESCRIPT item added based on Sign1
-Upcased all character records. 

DATA LINEAGE SUMMARY:

This data was originally released by U.S. Department of Transportation, 
Bureau of Transportation Statistics in 2001. The GeoPlan Center Data 
downloaded this data in shapefile format from the Bureau of Transportation 
Statistics website: http://www.bts.gov/gis/ntatlas/networks.html in 2002. 
When received, the data was in the following projection: Geographic, 
Datum: NAD 83, Spheroid: GRS80, Units: Decimal Degrees.  The shapefile was 
then clipped to the State of Florida and projected to FGDL Albers HPGN (See 
"Map Projection Parameters" below). All character items within the attribute
table were upcased and the DESCRIPT item was added based on Sign1.

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		 
Address:   400 Seventh Street, SW Washignton DC 20590			
Phone:     (202) 366-3282 			
Fax: 	    (202) 366-3640		
Web site:  http://www.bts.gov/			                 
Email:     answers@bts.gov                 

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