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    <titleInfo>
      <title>Grayscale Puerto Rico and the U.S. Virgin Islands Shaded Relief 200- Meter Resolution, Albers projection</title>
    </titleInfo>
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      <namePart>EROS Data Center</namePart>
      <role>
        <roleTerm authority="marcrelator" type="text">creator</roleTerm>
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    <genre valueURI="http://id.loc.gov/authorities/genreForms/gf2011026297" authority="lcgft">Geospatial data</genre>
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    <abstract lang="eng" displayLabel="Abstract">The grayscale Puerto Rico and U.S. Virgin Islands shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of Puerto Rico and U.S. Virgin Islands at a resolution of 200 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 National Atlas also includes a Lambert Azimuthal Equal Area projection shaded relief file; this file is the same data in an Albers projection. This layer is part of the 1997-2014 edition National Atlas of the United States.</abstract>
    <abstract lang="eng" displayLabel="Purpose">The grayscale shaded relief images were developed to portray the terrain of the United States. They are intended for visual purposes only. The original NED data must be used for conducting analysis and determining elevation values.</abstract>
    <note lang="eng" displayLabel="Preferred citation">National Atlas of the United States. (2005). Grayscale Puerto Rico and the U.S. Virgin Islands Shaded Relief 200- Meter Resolution, Albers projection. National Atlas of the United States. Available at: http://purl.stanford.edu/vb513xp0680.</note>
    <note displayLabel="Supplemental information">The associated world file is included as part of the GeoTIFF. The contents of the world file are: &gt;200.0000 &gt;0.000000 &gt;0.000000 &gt;-200.0000 &gt;-195900.0000 &gt;437900.0000 The following projection file can be used when using ESRI's ArcGIS to view the GeoTIFF (any line breaks should be removed): PROJCS["Albers_NAD_1983_PRVI",GEOGCS["GCS_North_American_1983", DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0, 298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree", 0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting", 0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",- 66.5],PARAMETER["Standard_Parallel_1",8.0],PARAMETER ["Standard_Parallel_2",18.0],PARAMETER["Latitude_Of_Origin",15.0], UNIT["Meter",1.0]]</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="lcsh" lang="eng">
      <topic authority="lcsh" authorityURI="http://id.loc.gov/authorities/subjects.html">Topographic maps</topic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/4566966/">Puerto Rico</geographic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/4796775/">United States Virgin Islands</geographic>
    </subject>
    <subject>
      <temporal encoding="w3cdtf">2006</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>Scale not given.</scale>
        <projection>Custom projection</projection>
        <coordinates>W 68&#xB0;21&#x2B9;28&#x2BA;--W 63&#xB0;47&#x2B9;20&#x2BA;/N 18&#xB0;57&#x2B9;11&#x2BA;--N 17&#xB0;3&#x2B9;36&#x2BA;</coordinates>
        <coordinates>W 68&#xB0;21&#x2B9;28&#x2BA;--W 63&#xB0;47&#x2B9;18&#x2BA;/N 18&#xB0;57&#x2B9;11&#x2BA;--N 17&#xB0;3&#x2B9;37&#x2BA;</coordinates>
      </cartographics>
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      <cartographics>
        <projection>EPSG::4326</projection>
      </cartographics>
    </subject>
    <originInfo>
      <dateIssued encoding="w3cdtf" keyDate="yes">2005</dateIssued>
      <dateValid encoding="w3cdtf">2006</dateValid>
      <place>
        <placeTerm type="text">Reston, Virginia, US</placeTerm>
      </place>
      <publisher>National Atlas of the United States</publisher>
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      <url usage="primary display">https://purl.stanford.edu/vb513xp0680</url>
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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>
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      <titleInfo>
        <title>National atlas of the United States of America, 1997-2014</title>
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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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