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    <titleInfo>
      <title>Global 3G Mobile Coverage Explorer, 2012</title>
    </titleInfo>
    <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>
    <genre>Dataset</genre>
    <physicalDescription>
      <digitalOrigin>born digital</digitalOrigin>
      <form>GeoTIFF</form>
      <extent>175.53 MB</extent>
    </physicalDescription>
    <language>
      <languageTerm authority="ISO639-2" type="code">eng</languageTerm>
    </language>
    <abstract displayLabel="Abstract">This raster dataset is a representation of the coverage area for 3G mobile communications networks around the world. Mobile Coverage is released annually in January each year. This data release is named 2012. Any operator data received up to the end of the year 2011 is included in this release. The coverages have been sourced directly from the network operators. However, not every operator has submitted data and so there are inevitable gaps in coverage. The data is created from submissions made directly to Collins Bartholomew or the GSMA from mobile operators, which provide roaming detail for inclusion in the online mapping application known as Collins Mobile Coverage Web. The cell values in the MCE rasters are as follows: 1 &#x2013; strong signal strength 2 &#x2013; variable signal strength.Polygons representing the network coverage have been split into country areas using the country polygons from the Collins World Explorer vector product. Polygons are supplied as multipart, and include any country ISO or FIPS codes where known. The data is supplied with a nominal resolution of approximately 1km on the ground. This map can be used to locate and analyze mobile communications coverage on a global scale.</abstract>
    <note displayLabel="Purpose" type="other">This map can be used to locate and analyze mobile communications coverage on a global scale.</note>
    <note displayLabel="Supplemental information" type="other">Operators are asked to submit strong (&gt;= -92dBm) and variable (&gt;= -100dBm and &lt; 92dBm) signal strengths as part of their submissions. The data here includes both types but does not make a distinction between the two.</note>
    <subject authority="geonames">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/6295630/">Earth (Planet)</geographic>
    </subject>
    <subject authority="lcsh">
      <topic authority="lcsh" authorityURI="http://id.loc.gov/authorities/subjects.html">Global system for mobile communications</topic>
    </subject>
    <subject authority="ISO19115TopicCategory">
      <topic authority="ISO19115TopicCategory" authorityURI="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_TopicCategoryCode" valueURI="utilitiesCommunication">Utilities and Communication</topic>
    </subject>
    <subject>
      <temporal encoding="w3cdtf">2012</temporal>
    </subject>
    <subject>
      <cartographics>
        <projection>EPSG::4326</projection>
        <coordinates>W 177&#xB0;7&#x2BA;--E 177&#xB0;/N 78&#xB0;27&#x2B9;49&#x2BA;--S 55&#xB0;36&#x2B9;39&#x2BA;</coordinates>
      </cartographics>
    </subject>
    <originInfo>
      <dateIssued encoding="w3cdtf" keyDate="yes">2021</dateIssued>
      <dateValid encoding="w3cdtf">2007</dateValid>
      <publisher>Collins Bartholomew Ltd.</publisher>
    </originInfo>
    <location>
      <url usage="primary display">https://purl.stanford.edu/wx910xj1289</url>
    </location>
    <note type="contact" displayLabel="Contact">John.Allen@HarperCollins.co.uk</note>
    <recordInfo>
      <languageOfCataloging>
        <languageTerm authority="ISO639-2" type="code">eng</languageTerm>
      </languageOfCataloging>
      <recordContentSource>Stanford</recordContentSource>
      <recordCreationDate encoding="w3cdtf">2021-11-01</recordCreationDate>
      <recordIdentifier>edu.stanford.purl:wx910xj1289</recordIdentifier>
    </recordInfo>
    <extension displayLabel="geo">
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        <rdf:Description rdf:about="http://purl.stanford.edu/wx910xj1289">
          <dc:format>image/tiff; format=GeoTIFF</dc:format>
          <dc:type>Dataset#Raster</dc:type>
          <gml:boundedBy>
            <gml:Envelope gml:srsName="EPSG:4326">
              <gml:lowerCorner>-163.8820411 -54.2114608</gml:lowerCorner>
              <gml:upperCorner>176.0008117 78.4635151</gml:upperCorner>
            </gml:Envelope>
          </gml:boundedBy>
        </rdf:Description>
      </rdf:RDF>
    </extension>
    <relatedItem type="host">
      <titleInfo>
        <title>Collins Mobile Coverage Explorer</title>
      </titleInfo>
      <location>
        <url>https://purl.stanford.edu/vh286rq6087</url>
      </location>
      <typeOfResource collection="yes"/>
    </relatedItem>
    <accessCondition type="useAndReproduction">These data are licensed by Stanford Libraries and are available to Stanford University affiliates only. Affiliates are limited to current faculty, staff and students. Non affiliates seeking access should contact the publisher directly. These data may not be reproduced or used for any purpose without permission.</accessCondition>
    <accessCondition type="copyright">Copyright ownership resides with the originator.</accessCondition>
  </mods>