Metadata Record Dublin Core Standard Title: Census 2000 Urbanized Areas Catalog Name: California Department of Forestry and Fire Protection OID: 747 CITATION INFORMATION Identifier: cen00ua Title: Census 2000 Urbanized Areas Originator: California Department of Forestry and Fire Protection Publication Date: 2003 Edition: 02_1 Information Resource Type Format: Computer file Content: Geographic information system Scale: 1:100,000 Other Citation Details: Map projection is Albers Equal Area, NAD27 IDENTIFICATION INFORMATION Abstract: Provides a seamless statewide GIS layer of urbanized areas, derived from 2000 census block data. Browse Graphic URL: http://frap.cdf.ca.gov/data/browsegraphic/ua2000.gif Purpose: Provides the statewide "urban footprint" from a consistent data source, useful for analyzing growth and associated impacts. Most useful for statewide or regional studies. Supplemental Info: Additional details on processing methods provided in data dictionary Time Period Start: 1/1/2000 Time Period End: 12/31/2000 Currentness: Publication Date Progress: Complete Update Frequency: As Needed Place: California Geographic Region West: -124 Geographic Region East: -114 Geographic Region North: 42 Geographic Region South: 32 Themes: Population, Land use User Keywords: Urban Footprint Access Limitations: No Restrictions Use Limitations: FRAP disclaimer Read disclaimer within data dictionary supplied when data are downloaded from FRAP site Contact Information Data Contact: FRAP Development Modeling Specilaist Organization: CDF-FRAP Phone: 916-445-5373 Fax: 916-324-1180 Email: Shawn.Saving@fire.ca.gov Url: http://frap.cdf.ca.gov/ Address: 1920 20th Street 1920 20th Street City: Sacramento State: California Postal Code: 95814 Country: USA DISTRIBUTION INFORMATION Online Linkage: http://frap.cdf.ca.gov/data.html Size (MB): 3 Distribution Format: ARC/INFO Export Ordering Instructions: Obtain on-line or request through distribution contact Contact Information Distribution Contact: FRAP data librarian Organization: CDF-FRAP Phone: 916-445-5342 Fax: 916-324-1180 Url: http://frap.cdf.ca.gov Address: 1920 20th Street 1920 20th Street City: Sacramento State: California Postal Code: 95814 Country: USA METADATA INFORMATION Date: 4/30/2004 Contact Information Metadata Contact: FRAP Development Modeling Specilaist Organization: CDF-FRAP Phone: 916-445-5373 Fax: 916-324-1180 Email: Shawn.Saving@fire.ca.gov Url: http://frap.cdf.ca.gov/ Address: 1920 20th Street 1920 20th Street City: Sacramento State: California Postal Code: 95814 Country: USA DATA DICTIONARY =============== FEATURE TYPE: Polygons NOTES: The original Census TIGER linework is distributed by county. The county boundaries do not match USGS county linework but do edgematch seamlessly with each other. We imported data in Decimal Degrees to maintain the original coordinates. Before further processing, the fuzzy tolerance was set to 0.000000000001. We dissolved the coverage on the items FIPS_CTBL and WATER to remove TIGER roads and streams that split census blocks into multiple polygons. Although most polygonal water features have unique FIPS_CTBL codes, some share their code with a block and therefore cannot be uniquely identified. Remaining extraneous arcs (dangles) were removed by selecting those arcs where LPOLY# was the same as RPOLY#. We detected no slivers after mapjoining and the number of unique census blocks in the final coverage matches the official number from the Census Bureau. We projected the entire statewide coverage into Teale Albers projection. Data from the SF1 file joined to the .PAT with no unmatched records. We then dissolved the statewide block coverage (CEN00BL02_1) on the items UR and UA and joined in attributes from the urbanized area names lists http://www.census.gov/geo/www/ua/uc_state_corr.txt and http://www.census.gov/geo/www/ua/ua_state_corr.txt. DATABASE FIELDS: polygons INPUT OUTPUT DATA DECI FIELD NAME WIDTH WIDTH TYPE MALS DESCRIPTION ---------- ----- ------ ---- ---- ------------------------------- AREA 8 18 F 5 - PERIMETER 8 18 F 5 - CEN00UA02_1# 4 5 B - - CEN00UA02_1-ID 4 5 B - - UR 1 1 C - U = Urbanized Area; R = Rural Area UA 5 5 C - Urbanized Area identifier UA_NAME 55 55 C - Name of Census Urbanized Area UA_TYPE 1 1 C - U- Urbanized Area; C - Urban Cluster POPULATION 4 10 B - Population from Census table AREALAND 8 12 F 0 Total land area of UA in sq. m. from Census table* POP_DENS 8 12 F 2 Pop density per square mile ** REDEFINED ITEMS ** URBAN 6 6 C - Concatenation of UR and UA items * AREALAND contains the area of the entire UA/UC. Thus, if the place is composed of two or more polygons, AREALAND will not agree with the calculated AREA measurement of the individual polygons. FIELD NAME: UA For Census 2000, the Census Bureau classifies as "urban" all territory, population, and housing units located within an urbanized area (UA) or an urban cluster (UC). It delineates UA and UC boundaries to encompass densely settled territory, which consists of: - core census block groups or blocks that have a population density of at least 1,000 people per square mile and - surrounding census blocks that have an overall density of at least 500 people per square mile In addition, under certain conditions, less densely settled territory may be part of each UA or UC. The Census Bureau's classification of "rural" consists of all territory, population, and housing units located outside of UAs and UCs. The rural component contains both place and nonplace territory. Geographic entities, such as census tracts, counties, metropolitan areas, and the territory outside metropolitan areas, often are "split" between urban and rural territory, and the population and housing units they contain often are partly classified as urban and partly classified as rural. Each urbanized area is assigned a five-digit Federal Information Processing Standards (FIPS) code in alphabetical order for the entire U.S. For more information see http://www.census.gov/geo/www/ua/ua_2k.html FIELD NAME: UA_NAME and UA_TYPE UA_NAME and UA_TYPE were derived from the Census data files http://www.census.gov/geo/www/ua/uc_state_corr.txt and http://www.census.gov/geo/www/ua/ua_state_corr.txt. COORDINATE SYSTEM DESCRIPTION Projection ALBERS Datum NAD27 Units METERS Spheroid CLARKE1866 Parameters: 1st standard parallel 34 0 0.000 2nd standard parallel 40 30 0.000 central meridian -120 0 0.00 latitude of projection's origin 0 0 0.000 false easting (meters) 0.00000 false northing (meters) -4000000.0000 DISCLAIMER The State of California and the Department of Forestry and Fire Protection make no representations or warranties regarding the accuracy of data or maps. The user will not seek to hold the State or the Department liable under any circumstances for any damages with respect to any claim by the user or any third party on account of or arising from the use of data or maps. The user will cite the Department of Forestry and Fire Protection as the original source of the data, but will clearly denote cases where the original data have been updated, modified, or in any way altered from the original condition. There are no restrictions on distribution of the data by users. However, users are encouraged to refer others to the Department of Forestry and Fire Protection to acquire the data, in case updated data become available.