<?xml version="1.0"?>
<mods xmlns="http://www.loc.gov/mods/v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:xlink="http://www.w3.org/1999/xlink" version="3.7" xsi:schemaLocation="http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-7.xsd">
    <titleInfo>
      <title>Solar: Average Monthly and Annual Latitude Tilt Irradiance Data, One-Degree Resolution of the World from NASA/SSE, 1983-2005</title>
    </titleInfo>
    <name type="corporate">
      <namePart>NASA Langley Atmospheric Sciences Data Center</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>
      <form>Shapefile</form>
      <extent>8.404999999999999</extent>
      <digitalOrigin>born digital</digitalOrigin>
    </physicalDescription>
    <language>
      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
    </language>
    <abstract lang="eng" displayLabel="Abstract">This polygon shapefile contains monthly and annual averages of solar Latitude Tilt Irradiance data (kWh/m^2/day) compiled by NASA and SSE. These data show monthly and annual averages starting from July 1983 until June 2005. Lat/Lon values indicate the lower left corner of a 1x1 degree region. Negative values are south and west; positive values are north and east. Boundaries of the -90/-180 region are -90 to -89 (south) and -180 to -179 (west). The last region, 89/180, is bounded by 89 to 90 (north) and 179 to 180 (east). The mid-point of the region is +0.5 added to the the Lat/Lon value. These data are regional averages; not point data.</abstract>
    <abstract lang="eng" displayLabel="Purpose">These data were created to provide investors and other stakeholders with reliable, verifiable and accessible information on the solar resource potential for the data domain. Flat-plate tilted at latitude (Tilt) products represent the solar resource available to a flat plate collector oriented due south at an angle from horizontal equal to the latitude of the collector location. This collector orientation is typical practice for PV system installation, although other orientations are also used.</abstract>
    <note lang="eng" displayLabel="Preferred citation">NASA Langley Atmospheric Sciences Data Center. (2008) Solar: Average Monthly and Annual Direct Normal Irradiance Data, One-Degree Resolution of the World from NASA/SSE, 1983-2005. NASA Available at: http://purl.stanford.edu/rn596kz1069</note>
    <note displayLabel="Supplemental information">Spatial Extent: Global Bounding Coordinates (decimal degrees) South:
-90.00, North: 90.00, West: -180.00, East:180.00
Coordinate System: Geographic, Datum: WGS84, Ellipsoid: WGS84.
Polygon shapefile with fields as defined below
ID (mandatory) - I4, unique identifier for each polygon
annual (mandatory) - R4, mean annual value in (kWh/m2/day)
jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec (optional) -
R4, mean monthly value in (kWh/m2/day)janmin, febmin, marmin,
aprmin, maymin, junmin, julmin, augmin sepmin, octmin, novmin, decmin
(optional) - R4, minimum monthly mean value in (kWh/m2/day)
janmax, febmax, marmax, aprmax, maymax, junmax, julmax, augmax, sepmax,
octmax, novmax, decmax
(optional) - R4, maximum monthly mean value in (kWh/m2/day)numyears
(optional) - I4, number of years used in estimate</note>
    <subject authority="lcsh" lang="eng">
      <topic authority="lcsh" authorityURI="http://id.loc.gov/authorities/subjects.html">Solar energy</topic>
    </subject>
    <subject authority="geonames" lang="eng">
      <geographic authority="geonames" authorityURI="http://www.geonames.org/ontology#" valueURI="http://sws.geonames.org/6295630/">Earth</geographic>
    </subject>
    <subject>
      <temporal point="start" encoding="w3cdtf">1983</temporal>
      <temporal point="end" encoding="w3cdtf">2005</temporal>
    </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 authority="lcsh">
      <geographic authority="lcsh" valueURI="https://id.loc.gov/authorities/subjects/sh85040427">Earth (Planet)</geographic>
    </subject>
    <subject>
      <cartographics>
        <scale>Scale not given.</scale>
        <coordinates>W 180&#xB0;--E 180&#xB0;/N 90&#xB0;--S 90&#xB0;</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">2008</dateIssued>
      <dateValid encoding="w3cdtf" point="start">1983</dateValid>
      <dateValid encoding="w3cdtf" point="end">2005</dateValid>
      <place>
        <placeTerm type="text">Hampton, Virginia, US</placeTerm>
      </place>
      <publisher>NASA Langley Atmospheric Sciences Data Center</publisher>
      <edition>Release 6.0</edition>
    </originInfo>
    <location>
      <url usage="primary display">https://purl.stanford.edu/rn596kz1069</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:rn596kz1069</recordIdentifier>
    </recordInfo>
    <extension displayLabel="geo">
      <rdf:RDF xmlns:gml="http://www.opengis.net/gml/3.2/" xmlns:dc="http://purl.org/dc/elements/1.1/">
        <rdf:Description rdf:about="http://purl.stanford.edu/rn596kz1069">
          <dc:format>application/x-esri-shapefile; format=Shapefile</dc:format>
          <dc:type>Dataset#Polygon</dc:type>
          <gml:boundedBy>
            <gml:Envelope gml:srsName="EPSG:4326">
              <gml:lowerCorner>-180.0 -90.0</gml:lowerCorner>
              <gml:upperCorner>180.0 90.0</gml:upperCorner>
            </gml:Envelope>
          </gml:boundedBy>
        </rdf:Description>
      </rdf:RDF>
    </extension>
    <relatedItem type="host">
      <titleInfo>
        <title>NASA Surface Meteorology and Solar Energy : Global Data Sets</title>
      </titleInfo>
      <location>
        <url>https://purl.stanford.edu/bn217rw0181</url>
      </location>
      <typeOfResource collection="yes"/>
    </relatedItem>
    <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>
  </mods>