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