@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/684edd3f-3378-440e-9b8b-2e7c421741da>
  skos:definition """A densiometer is used to determine amount of canopy closure.  In
other words, you are deciding how much of the sky above you is
blocked by trees.  When looking into a densiometer there is a
mirror image of what is above you (it works like a periscope on
a submarine).

To use a densiometer correctly it must be held level.  When
looking into the densiometer you can see the trees above you.
If more than 50% of the view is covered by branches, leaves, or
limbs the canopy is closed.  If less than 50% of the view is
covered by branches, leaves, or limbs the canopy is open.

Additional information available at
"http://www.uwsp.edu/cnr/cwes/forestree/Toolbox/densiometer.htm"

[Summary provided by the University of Wisconsin]"""@en ;
  skos:prefLabel "DENSIOMETERS"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/8143e95e-a438-4a2a-82b2-6d7ae079fba7> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/8143e95e-a438-4a2a-82b2-6d7ae079fba7>
  skos:prefLabel "Photon/Optical Detectors"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/684edd3f-3378-440e-9b8b-2e7c421741da> .