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    <titleInfo>
      <title>Census Traffic Analysis Zones, 1990 - San Francisco Bay Area, California</title>
    </titleInfo>
    <name type="corporate">
      <namePart>California. Metropolitan Transportation Commission</namePart>
      <role>
        <roleTerm authority="marcrelator" type="text">creator</roleTerm>
      </role>
    </name>
    <genre valueURI="http://id.loc.gov/authorities/genreForms/gf2011026297" authority="lcgft">Geospatial data</genre>
    <genre valueURI="http://rdvocab.info/termList/RDAContentType/1001" authority="rdacontent">cartographic dataset</genre>
    <typeOfResource>cartographic</typeOfResource>
    <typeOfResource>software, multimedia</typeOfResource>
    <physicalDescription>
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      <extent>3.86</extent>
      <digitalOrigin>born digital</digitalOrigin>
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    <language>
      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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    <abstract lang="eng" displayLabel="Abstract">This polygon shapefile contains the Census Traffic Analysis Zones (CTAZ) for California for the year 1990. The CTAZ zones range in size from multiple-block level in downtown San Francisco, Oakland, and San Jose to block group and tract level in suburban and rural areas of the region. The CTAZ zones nest within the older, MTC 1099 regional travel analysis zone (RTAZ) system. A traffic analysis zone (TAZ) is a statistical entity delineated by state or local transportation officials for tabulating traffic-related census data-especially journey-to-work and place-of-work statistics. A TAZ usually consists of one or more census blocks, block groups, or census tracts. For the 1990 census, TAZs were defined as part of the Census Transportation Planning Package (CTPP). The U.S. Census Bureau first provided data for TAZs in conjunction with the 1980 census, when it identified them as ''traffic zones.'' Each TAZ is identified by a six-character alphanumeric code that is unique within county or statistically equivalent entity. For the 1990 census, TAZ codes were unique within CTPP area, which generally conformed to a metropolitan area. This layer is part of the Bay Area Metropolitan Transportation Commission (MTC) GIS Maps and Data collection.</abstract>
    <abstract lang="eng" displayLabel="Purpose">This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data.</abstract>
    <note lang="eng" displayLabel="Preferred citation">California, Metropolitan Transportation Commission. (2002). Census Traffic Analysis Zones, 1990 - San Francisco Bay Area, California. MTC. Available at: http://purl.stanford.edu/xd776gb4294.</note>
    <note displayLabel="WGS84 Cartographics">This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.</note>
    <subject authority="lcsh" lang="eng">
      <topic authority="lcsh" authorityURI="http://id.loc.gov/authorities/subjects.html">Transportation demand management</topic>
    </subject>
    <subject authority="lcsh" lang="eng">
      <topic authority="lcsh" authorityURI="http://id.loc.gov/authorities/subjects.html">Population</topic>
    </subject>
    <subject authority="lcsh" lang="eng">
      <topic authority="lcsh" authorityURI="http://id.loc.gov/authorities/subjects.html">Traffic estimation</topic>
    </subject>
    <subject lang="eng">
      <geographic>San Francisco Bay Area (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5391959/">San Francisco (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5339268/">Contra Costa County (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5376101/">Napa County (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5392427/">San Mateo County (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5392427/">San Mateo County (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5396987/">Solano County (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5397100/">Sonoma County (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5370468/">Marin County (Calif.)</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5322745/">Alameda County (Calif.)</geographic>
    </subject>
    <subject>
      <temporal encoding="w3cdtf">1990</temporal>
    </subject>
    <subject authority="ISO19115TopicCategory">
      <topic authority="ISO19115TopicCategory" authorityURI="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_TopicCategoryCode" valueURI="planningCadastre">Planning and Cadastral</topic>
    </subject>
    <subject authority="ISO19115TopicCategory">
      <topic authority="ISO19115TopicCategory" authorityURI="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_TopicCategoryCode" valueURI="transportation">Transportation</topic>
    </subject>
    <subject>
      <cartographics>
        <scale>Scale not given.</scale>
        <projection>Custom projection</projection>
        <coordinates>W 123&#xB0;32&#x2B9;--W 121&#xB0;9&#x2B9;47&#x2BA;/N 38&#xB0;51&#x2B9;57&#x2BA;--N 36&#xB0;53&#x2B9;21&#x2BA;</coordinates>
        <coordinates>W 123&#xB0;31&#x2B9;57&#x2BA;--W 121&#xB0;12&#x2B9;26&#x2BA;/N 38&#xB0;51&#x2B9;52&#x2BA;--N 36&#xB0;53&#x2B9;39&#x2BA;</coordinates>
      </cartographics>
    </subject>
    <subject displayLabel="WGS84" authority="EPSG" valueURI="http://opengis.net/def/crs/EPSG/0/4326">
      <cartographics>
        <projection>EPSG::4326</projection>
      </cartographics>
    </subject>
    <originInfo>
      <dateIssued encoding="w3cdtf" keyDate="yes">2002</dateIssued>
      <dateValid encoding="w3cdtf">1990</dateValid>
      <place>
        <placeTerm type="text">Oakland, California, US</placeTerm>
      </place>
      <publisher>California. Metropolitan Transportation Commission</publisher>
    </originInfo>
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      <url usage="primary display">https://purl.stanford.edu/xd776gb4294</url>
    </location>
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        <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
      </languageOfCataloging>
      <recordContentSource>Stanford</recordContentSource>
      <recordOrigin>This record was translated from ISO 19139 to MODS v.3 using an xsl transformation.</recordOrigin>
      <recordIdentifier>edu.stanford.purl:xd776gb4294</recordIdentifier>
    </recordInfo>
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    <relatedItem type="host">
      <titleInfo>
        <title>Metropolitan Transportation Commission GIS Maps &amp; Data</title>
      </titleInfo>
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        <url>https://purl.stanford.edu/bq589tv8583</url>
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    <accessCondition type="useAndReproduction">This item is in the public domain.  There are no restrictions on use.</accessCondition>
    <accessCondition type="copyright">This work is in the Public Domain, meaning that it is not subject to copyright.</accessCondition>
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