FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
(VERSION 1.0)


DIGITAL LINE GRAPHS; 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.
 

DATA SOURCE(S):               UNITED STATES GEOLOGICAL
                              SURVEY



SCALE OF ORIGINAL SOURCE MAPS:      1:24,000


GEODATASET EXTENT:                  State of Florida


FEATURE ATTRIBUTE TABLES
Datafile Name: RDS24.DBF

ITEM NAME   WIDTH         TYPE         PRECISION
FNODE_      11            Decimal      0
TNODE_      11            Decimal      0
LPOLY_      11            Decimal      0
RPOLY_      11            Decimal      0
LENGTH      12            Decimal      3
RDS24_      11            Decimal      0
RDS24_ID    11            Decimal      0
MAJOR1       6            Decimal      0
MINOR1       6            Decimal      0
MAJOR2       6            Decimal      0
MINOR2       6            Decimal      0
MAJOR3       6            Decimal      0
MINOR3       6            Decimal      0
MAJOR4       6            Decimal      0
MINOR4       6            Decimal      0
MAJOR5       6            Decimal      0
MINOR5       6            Decimal      0
MAJOR6       6            Decimal      0
MINOR6       6            Decimal      0
MAJOR7       6            Decimal      0
MINOR7       6            Decimal      0
MAJOR8       6            Decimal      0
MINOR8       6            Decimal      0
MAJOR9       6            Decimal      0
MINOR9       6            Decimal      0
MAJOR10      6            Decimal      0
MINOR10      6            Decimal      0
DESCRIPT   100            Character


FEATURE ATTRIBUTE TABLES CODES AND VALUES
Item            Item description

MAJOR1 / MINOR1

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

      170   0100      Void area
            020l      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


MAJOR2 / MINOR2

      VALUE          DESCRIPTION
      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:


FGDL QUALITY ASSURANCE STATUS:

-  Changes to tolerance, precision:

         Single precision projected to double precision

-  Changes to nodes, labels, intersections:

         None
   
-  Changes to records:
   
         Descript item added to AAT

-  Changes to number of features (duplicate points, etc)

         None

-  Notes:

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!!!


REFERENCES:


DATA LINEAGE SUMMARY:


MAP PROJECTION PARAMETERS

Projection                      ALBERS
Units                           METERS
Datum                           NAD27
Spheroid                        CLARKE 1866
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 SOURCE CONTACT(S):
Name:                   EARTH SCIENCE INFORMATION CENTER 
Abbr. Name:                  
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                             
Ftp site:               
Email:                  MACWEBMASTER@USGS/GOV
Contact Person:         They will route your message to the person best
                        qualified to respond.
         Phone:                      
         Email:          
 

FGDL CONTACT:
Name:                   UNIVERSITY OF FLORIDA GEOPLAN CENTER
Abbr. Name:             GeoPlan Center
Address:                University of Florida, GeoPlan Center
                        431 Architecture
                        PO Box 115706
                        Gainesville, FL  32611-5706
Phone:                  (352) 846-3125
Fax:                    (352) 846-3124
Web site:               http://www.geoplan.ufl.edu/projects/fgdl.htm
Contact FGDL*:
      to request FGDL data:        fgdl-request@geoplan.ufl.edu
      to report data problems:     fgdl-data@geoplan.ufl.edu
      for Viewer problems:         fgdl-apps@geoplan.ufl.edu
      for image problems:          fgdl-image@geoplan.ufl.edu
      for FGDL Viewer Extensions:  www.geoplan.ufl.edu/projects/fgdl.htm
                                   or
                                   ftp.geoplan.ufl.edu

* Please use the email address as the primary method of contacting
GeoPlan.  The phone number can be used as a secondary form
of contact.  Thank you.