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    <titleInfo>
      <title>100-Meter Resolution Elevation of Alaska, Albers projection</title>
    </titleInfo>
    <name type="corporate">
      <namePart>Geological Survey (U.S.)</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>
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      <digitalOrigin>born digital</digitalOrigin>
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    <language>
      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
    </language>
    <abstract lang="eng" displayLabel="Abstract">This layer is a georeferenced raster image displaying elevation data for Alaska using an Albers projection. The elevation data were derived from National Elevation Dataset (NED) and show the terrain at a resolution of 100 meters. The NED is a raster product assembled by the U.S. Geological Survey, designed to provide national elevation data in a seamless form with a consistent datum, elevation unit, and projection. Data corrections made in the NED assembly process minimize artifacts, permit edge matching, and fill sliver areas of missing data. The NED is updated on a bi-monthly basis. This data set was derived from NED data released in December, 2010, This layer is part of the 1997-2014 edition National Atlas of the United States.</abstract>
    <abstract lang="eng" displayLabel="Purpose">The 100-meter resolution elevation data were developed to portray the terrain of the United States at 1:1,000,000 scale. They are intended primarily for visual purposes. The original NED data should be used for conducting analysis and determining the most accurate elevation values. No responsibility is assumed by the National Atlas of the United States in the use of these data.</abstract>
    <note lang="eng" displayLabel="Preferred citation">National Atlas of the United States. (2012). 100-Meter Resolution Elevation of Alaska, Albers projection. National Atlas of the United States. Available at: http://purl.stanford.edu/sg962yb7367.</note>
    <note displayLabel="Supplemental information">Included with the GeoTIFF are an auxiliary information file (.aux.xml), an image overview file (.ovr), a value attribute database file (.vat.dbf), a .tfw file (more information included below), and a .prj file (more information included below.) The contents of the associated world file (.tfw) are: &gt;100.0 &gt;0.0 &gt;0.0 &gt;-100.0 &gt;-3326950.0 &gt;2437950.0 The projection (.prj) file contains the following information: &gt; PROJCS["Albers_NAD83_Alaska", &gt;GEOGCS["GCS_North_American_1983", &gt;DATUM["D_North_American_1983", &gt;SPHEROID["GRS_1980",6378137.0,298.257222101]], &gt;PRIMEM["Greenwich",0.0], &gt;UNIT["Degree",0.0174532925199433]], &gt;PROJECTION["Albers"], &gt;PARAMETER["False_Easting",0.0], &gt;PARAMETER["False_Northing",0.0], &gt;PARAMETER["Central_Meridian",-154.0], &gt;PARAMETER["Standard_Parallel_1",55.0], &gt;PARAMETER["Standard_Parallel_2",65.0], &gt;PARAMETER["Latitude_Of_Origin",50.0], &gt;UNIT["Meter",1.0]] Data set extent in meters (Albers Equal-Area Conic projection) &gt;North 2438000 &gt;West -3327000 &gt;East 1654000 &gt;South 346000 There are no NULL or NODATA values in the GeoTIFF. Instead, all elevation values in oceans have been set to zero as part of the masking process. A copy of the land/water mask used in processing is available on request. Information about National Atlas Web services can be found on the Web Map and Web Feature Services page; see &lt;http://nationalatlas.gov/infodocs/webservices.html&gt;.</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">Digital elevation models</topic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/5879092/">Alaska</geographic>
    </subject>
    <subject>
      <temporal encoding="w3cdtf">2010</temporal>
    </subject>
    <subject authority="ISO19115TopicCategory">
      <topic authority="ISO19115TopicCategory" authorityURI="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_TopicCategoryCode" valueURI="imageryBaseMapsEarthCover">Imagery and Base Maps</topic>
    </subject>
    <subject authority="ISO19115TopicCategory">
      <topic authority="ISO19115TopicCategory" authorityURI="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_TopicCategoryCode" valueURI="elevation">Elevation</topic>
    </subject>
    <subject>
      <cartographics>
        <scale>1:1000000</scale>
        <scale>Scale not given.</scale>
        <projection>EPSG::3338</projection>
        <coordinates>W 180&#xB0;--E 180&#xB0;/N 71&#xB0;57&#x2B9;17&#x2BA;--N 43&#xB0;3&#x2B9;12&#x2BA;</coordinates>
        <coordinates>W 180&#xB0;--E 179&#xB0;59&#x2B9;58&#x2BA;/N 71&#xB0;57&#x2B9;16&#x2BA;--N 43&#xB0;3&#x2B9;12&#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">2012</dateIssued>
      <dateValid encoding="w3cdtf">2010</dateValid>
      <place>
        <placeTerm type="text">Rolla, Missouri, US</placeTerm>
      </place>
      <publisher>National Atlas of the United States</publisher>
    </originInfo>
    <location>
      <url usage="primary display">https://purl.stanford.edu/sg962yb7367</url>
    </location>
    <recordInfo>
      <languageOfCataloging>
        <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:sg962yb7367</recordIdentifier>
    </recordInfo>
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    <relatedItem type="host">
      <titleInfo>
        <title>National atlas of the United States of America, 1997-2014</title>
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        <url>https://purl.stanford.edu/cv275yx9215</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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