FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2005
TITLE: THE FEDERAL AID URBANIZED AREA BOUNDARIES
Geodataset Name: FEDERALHWY_UZA Geodataset Type: SHAPE Geodataset Feature: POLYGON
GENERAL DESCRIPTION:
This dataset contains 2003 Federal Aid Urbanized Area Boundaries Information for the State of Florida. The Federal Aid Urbanized Area Boundaries dataset provides information on urban areas with a population greater than 50,000. The dataset contains information such as the locations, names, urban, census and FIPS codes, and size of urban areas.
DATA SOURCE(S): Bureau of Transportation Statistics (BTS) SCALE OF ORIGINAL SOURCE MAPS: 1:100,000 (inland) to 1:250,000 (coast) DATE OF AUTOMATION OR SOURCE: Source 1990, Automated 2003 GEODATASET EXTENT: State of FloridaFEATURE ATTRIBUTE TABLES:
Datafile Name: FEDERALHWY_UZA.DBF ITEM NAME WIDTH TYPE PRECISION Shape 8 SHAPEPOLY 0 Moddate 8 DECIMAL 0 Polyid 10 DECIMAL 0 Featurid 10 DECIMAL 0 Stfips 2 CHARACTER 0 Longitude 19 DECIMAL 6 Latitude 19 DECIMAL 6 Source 1 CHARACTER 0 Sqmiles 18 DECIMAL 3 Sqkm 18 DECIMAL 3 Name 40 CHARACTER 0 Cencode 4 DECIMAL 0 Version 2 CHARACTER 0 Revision 2 CHARACTER 0 Descript 40 CHARACTER 0
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
ITEM ITEM DESCRIPTION FID Internal feature number. Shape Feature geometry. MODDATE The MODDATE (or modification date) is a character field 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'. POLYID Unique identifier for each polygon FEATURID Unique identifier for each geographic entity (the Urbanized Area Code). STFIPS Two character state Federal Information Processing Standard (FIPS) Code. LONGITUDE Centroid longitude value for the polygon expressed in decimal degrees. LATITUDE Centroid latitude value for the polygon expressed in decimal degrees. SOURCE Describes the original source of the NAME attribute data in the polygon record SQMILES An approximation of the area of the Urbanized Area in square miles. SQKM An approximation of the area of the Urbanized Area in square kilometers. NAME Name/identification of the geographic entity the Urbanized Area Name Polygons in the data set that are not part of an urbanized area contain a series of 'XX's in this version. CENCODE The Census assigned Urbanized Area Code for the adjusted urbanized area 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 02. REVISION REVISION is a 2-digit number that will be incremente individually for each record whenever a change is made t one of its fields. In this release the value is 01 DESCRIPT Field added by FGDL based on NAME.
USER NOTES:
This dataset contains informatin on Federal Aid Urbanized Area Boundaries from the U.S. Department of Transportation, Bureau of Transportation Statistics (BTS), Federal Highways Administration (FHWA), and National Transportation Atlas Database (NTAD) 2003. The Federal Aid Urbanized Area Boundaries database is a geographic database of Federal-aid boundaries for urban areas with a population greater than 50,000. The database includes boundaries for urban areas in Florida. The data provide users with information about the locations, names, urban, census and FIPS codes, and size of urban areas. The Federal-Aid Urbanized Area Boundaries files were compiled from a variety of sources including the US Bureau of the Census (BOC), National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS), and data supplied by State Departments of Transportation (DOTs). The data sets were created and standardized by members of the Geographic Information Systems Laboratory, Pellissippi Research Institute, The University of Tennessee, Knoxville. Attributes for the Adjusted Urbanized Area database are created in a consistent manner with a similar tolerance. Other attributes in the Adjusted Urbanized Area database were taken from the Highway Performance Monitoring System Field Manual Appendix B. All area and distance calculations are calculated to the nearest 50m. All node-link and polygon topological relationships are created and verified using computer algorithms. Uniqueness of entity IDs are similarly verified by computer algorithm. The positional accuracy of each data set varies as described. The Adjusted Urbanized Area database was created from data which had scale of 1:100,000 or better and as such has a positional accuracy of +/- 80m. The shorelines for the 23 coastal states were created using 1:250,000 NOS digital data which has a positional accuracy of +/- 200m. Thus, all internal political boundaries have a higher accuracy than do the coastal definitions. All state supplied maps were digitized using ARC/INFO V6.1x. All State supplied digital data was converted to ARC/INFO using a variety of encoding methods. The state databases were appended and adjusted to correct minor geodetic problems. After attributes were added and the data set checked for completeness and accuracy it was extracted from ARC/INFO and reformatted into ASCII data files. After completing topological and attribute verification using ARC/INFO, the data was extracted reformatted into the BTS ASCII format, and converted into shapefile format and redundant fields were eliminated. 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 multicounty 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:
Process Steps for NTAD 2003 Federal aid urbanized area boundaries: -Federal aid urbanized area boundaries locations were obtained from the CD-ROM National Transportation Atlas Database (NTAD) 2003 (A Collection of Spatial Data for Use in GIS-based Applications) BTS-03-04. -GeoPlan extracted this data in shapefile format and removed boundaries not located in Florida. -The shapefile was reprojected from WGS_1984 Decimal Degrees to the FGDL Albers HPGN map projection. (See "Map Projection Parameters" below)
REFERENCES:
Bureau of Transportation Statistics (BTS) http://www.bts.gov/gis
DATA LINEAGE SUMMARY:
Federal aid urbanized area boundaries locations were obtained from the CD-ROM National Transportation Atlas Database (NTAD) 2003 (A Collection of Spatial Data for Use in GIS-based Applications) BTS-03-04. GeoPlan extracted this data in shapefile format and removed facilities not located in Florida. The shapefile was reprojected from WGS_1984 Decimal Degrees to the FGDL Albers HPGN map projection. (See "Map Projection Parameters" below)
MAP PROJECTION PARAMETERS:
Projection ALBERS Datum HPGN Units METERS Spheroid GRS1980 1st Standard Parallel 24 0 0.000 2nd Standard Parallel 31 30 0.000 Central Meridian -84 00 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 (BTS) Web site: http://www.bts.gov/gis/ Address: 400 Seventh Street, S.W. Address: Bureau of Transportation Statistics (BTS) City: Washington State_or_Province: DC Postal_Code: 20590 Country: USA Contact Voice Telephone: 202-366-DATA Contact Facsimile Telephone: 202-366-3640 Contact Electronic Mail Address: 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