<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
  <gcmd:gcmd>
    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>23.7</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-04-15T10:53:30.610Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/f523f73f-efcc-4193-b9e3-1161ed7f4881</gcmd:viewer>
  </gcmd:gcmd>
  <skos:Concept rdf:about="f523f73f-efcc-4193-b9e3-1161ed7f4881">
    <skos:broader rdf:resource="d73e969a-4b66-4713-8d63-fa3cbb1e25e3"/>
    <skos:prefLabel xml:lang="en">LEADS</skos:prefLabel>
    <gcmd:reference gcmd:text="Canadian Ice Service - Environment Canada &apos;http://www.cis.ec.gc.ca/manice/chp1_eng.htm&apos;  See also Hall, D.K. and J. Martinec. 1985. Remote Sensing of Ice and Snow,  Chapman and Hall. London." xml:lang="en"/>
    <skos:definition xml:lang="en">Any fracture or passage-way through ice which is navigable by surface
vessels. Leads and other open water areas within the sea ice pack are also
important in studies of the energy budget in the polar regions and in
local and regional climatology.</skos:definition>
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