FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
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