FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2005

TITLE: USGS 1:24,000 ROADS

Geodataset Name:      RDS24
Geodataset Type:      Shape
Geodataset Feature:   LINE

GENERAL DESCRIPTION:

This coverage contains the digital line graphs (DLG) for the state of Florida as
compiled by the Earth Science information center of the U.S. Geological Survey. The
RDS24 coverage is a subset of all transportation data from the DLG data files
derived from the 1:24,000-scale and other large-scale maps.  This dataset has been
updated from the previous version on FGDL 3.0. 
DATA SOURCE(S):                   UNITED STATES GEOLOGICAL SURVEY
SCALE OF ORIGINAL SOURCE MAPS:    1:24,000
DATE OF AUTOMATION OR SOURCE:     1995 - 1998    
GEODATASET EXTENT:                State of Florida
 

FEATURE ATTRIBUTE TABLES:

Datafile Name: RDS24.DBF

ITEM NAME     WIDTH       TYPE        PRECISION

SHAPE            9        Shapeline       0
LENGTH          12        Decimal         3                 
MAJOR1           6        Decimal         0         
MINOR1           6        Decimal         0         
MAJOR2           6        Decimal         0         
MINOR2           6        Decimal         0
DESCRIPT       100        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. 		

     VALUE           DESCRIPTION
     
      l70   0001      Bridge abutment
            0002      Tunnel portal
            0004      Gate
            0005      Cul-de-sac
            0006      Dead end
            0007      Drawbridge

      170   0100      Void area
            0201      Primary route, class 1, symbol undivided                   
            0202      Primary route, class 1, symbol divided by centerline
            0203      Primary route, class 1, divided, lanes separated             
            0204      Primary route, class 1, one way, other than divided highway           
            0205      Secondary route, class 2, symbol undivided           
            0206      Secondary route, class 2, symbol divided by centerline
            0207      Secondary route, class 2, symbol divided, lanes separated
            0208      Secondary route, class 2, one way 
            0209      Road or street, class 3
            0210      Road or street, class 4
            0211      Trail, class 5, other than four-wheel-drive vehicle
            02l2      Trail, class 5, four-wheel-drive vehicle
            0213      Footbridge
            02l4      Road ferry crossing
            02l5      Perimeter of parking area
            02l6      Arbitrary extension of line (join or closure)
            02l7      Road or street, class 3, symbol divided by centerline
            0218      Road or street, class 3, divided lanes separated
            0219      Road or street, class 4, one way
            0220      Closure line
            0221      Road or street, class 3, one way
            0222      Road in transition
            0299      Processing line

      l70   0401      Traffic circle
            0402      Cloverleaf or interchange
            0403      Toll gate, toll plaza or perimeter of toll plaza
            0404      Weigh station
            0405      Nonstandard section of road

      170   0601      In tunnel
            0602      Overpassing, on bridge
            0603      Under construction, classification known
            0604      Under construction, classification unknown
            0605      Labeled "old railroad grade"
            0606      Submerged or in ford
            0607      Underpassing
            0608      Limited access
            0609      Toll road
            0610      Privately operated or controlled 
                      public access
            0611      Proposed
            0612      Double-decked
            0613      In service facility or rest area
            0614      Elevated
            0615      Bypass route
            0616      Alternate route
            0617      Business route
            0618      On drawbridge
            0619      Spur
            0620      Loop
            0621      Connector
            0622      Truck route
            0650      Road width 46-55 feet, 0.025 inches
                      at 1:24,000
            0651      Road width 56-65 feet, 0.030 inches
                      at 1:24,000
            0652      Road width 66-75 feet, 0.035 inches
                      at 1:24,000

      170   0653      Road width 76-85 feet, 0.040 inches
                      at 1:24,000
            0654      Road width 86-95 feet, 0.045 inches
                      at 1:24,000
            0655      Road width 96-105 feet, 0.050 inches
                      at 1:24,000
            0656      Road width 106-115 feet, 0.055 inches
                      at 1:24,000
            0657      Road width 116-125 feet, 0.060 inches
                      at 1:24,000
            0658      Road width 126-135 feet, 0.065 inches
                      at 1:24,000
            0659      Road width 136-145 feet, 0.070 inches 
                      at 1:24,000

      170   0000      Photorevised feature
      171            Number of lanes types
      172            Interstate route number
      173            U.S. route number
      174            State route number
      175            Reservation, park, or military route
                     number
      176            County route

      177            XXYY   Alphabetic portion of any route 
                     number.  Substitute numeric equiva-
                     lent of alphabetic for XX and for YY 
                     as follows:  00 = blank, 01 = A, 
                     02 = B, 03 = C, 04 = D, 05 = E,
                     06 = F, 07 = G, 08 = H, 09 = I,
                     10 = J, 11 = K, 12 = L, 13 = M, 
                     14 = N, 15 = O, 16 = P, 17 = Q, 
                     18 = R, 19 = S, 20 = T, 21 = U, 
                     22 = V, 23 = W, 24 = X, 25 = Y, 
                     26 = Z.


Description of the FEATURE items 

The RDS24 coverage is defined by use of major and minor pairs. 

Major1 = DLG data delineations, ie. transportation, hydrology, boundaries, etc.
Minor1 = defines the type of road, ie.
bridge, two lane, class, etc. 

Major2 = defines the type of road ie. state, us, county, interstate roads, etc.
Minor2 = contains the state road #, ie. state
Road #220, US 75, Cnty Rd 100 etc. 

*Major and Minor pairs 3-10 are utilized in other DLG covers, however are not
utilized as identifiers in RDS24! 
 

USER NOTES:

This data layer was started in 1990 and is continually being updated.  

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)
-Upcased all character records
-Descript item added based on FEATURE
   Descript item was calculated on Major1, Minor1 pairs, which
   describe the type of line (transportation) and type of road
   (ie.class 3 divided, footbridge, trail class 5, etc.)
   State Route names COULD be defined in a descript item by 
   reselecting major2 = 174  and using the minor2 code as the 
   descript item.   
   US Route names COULD also be defined in a descript item by 
   reselecting major2 = 173 and using the minor2 code as descript item.
   Interstate Route numbers COULD also be defined in a descript item by 
   reselecting the major2 = 172 and using the minor2 code to define the 
   item.
   Minor2 numbers could not be used as a rds24 descript item because of 
   conflicts between US, State, and Interstate road names.
-Dropped old internal coverage items: 
   FNODE#, TNODE#, LPOLY#, RPOLY#, RDS24_2_, RDS24_2_ID
-Dropped items MAJOR3/MINOR3 through MAJOR10/MINOR10

REFERENCES:

UNITED STATES GEOLOGICAL SURVEY
 

DATA LINEAGE SUMMARY:

Data was downloaded in DLG SDTS format by the GeoPlan Center from USGS Mapping 
Applications Center in 2000. When received, data was in the following projection:
UTM zone 16 & 17, Datum: NAD83, Spheroid: GRS1980, Units: Meters. Data was 
imported to coverage and reprojected to FGDL Albers HPGN, converted to shapefile,
DESCRIPT item was added based on FEATURE, and lowercase characters within the 
attribute table were upcased.  Internal coverage items and items MAJOR3/
MINOR3 through MAJOR10/MINOR10 were also dropped.
Missing or erroneous quads;  q2008, q1903, q2016, q5360, q4112 were replaced and
rectified by downloading the revised dlg's from the LABINS ftp site.
(ftp://128.186.177.137/dlg/revised)
 

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: 	         EARTH SCIENCE INFORMATION CENTER		 
Abbr.name:       N/A 		
Address:         Earth Science Information Center
                 United States Geological Survey
                 507 National Center
                 Reston, VA  22092							
Phone: 	         (703) 860-6045		
Fax: 	         (703) 860-4165		
Web site:        http://www.usgs.gov
Email:           MACWEBMASTER@USGS.GOV
Contact Person:  They will route your message to the person best
                 qualified to respond. 	
         Phone: 	
         Email:                 

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