{
 "uri": "https://pdssp.github.io/pdssp-ontology/vocab#MethodScheme",
 "flavour": "SKOS",
 "terms": {
  "Method-AerialPhotography": {
   "label": "Aerial photography",
   "description": "Imaging from an aircraft flying within an atmosphere. Kept from the USGS Thesaurus; on planetary bodies, e.g. images taken by the Ingenuity Mars helicopter.",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-HyperspectralImaging": {
   "label": "Hyperspectral imaging",
   "description": "Imaging spectroscopy: tens to hundreds of narrow, contiguous spectral bands, giving a spectrum for every pixel, e.g. MRO CRISM or Mars Express OMEGA.",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-InfraredImaging": {
   "label": "Infrared imaging",
   "description": "Imaging of reflected or emitted infrared radiation (about 0.7 \u00b5m to 1 mm), e.g. near-infrared reflectance imaging; see Thermal imaging for emitted heat.",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-Lidar": {
   "label": "Lidar",
   "description": "Laser ranging: distance measured from the travel time of laser pulses, giving topography or point clouds, e.g. MGS MOLA or LRO LOLA.",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-MicrowaveImaging": {
   "label": "Microwave imaging",
   "description": "Imaging with microwave radiation (about 1 mm to 1 m), either passive (radiometry of emitted microwaves) or active (see Radar imaging).",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-MultispectralImaging": {
   "label": "Multispectral imaging",
   "description": "Imaging in a few discrete spectral bands (typically 2 to about 15), giving one co-registered image per band, e.g. HiRISE colour (BLUE-GREEN, RED, NEAR-INFRARED).",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-PanchromaticImaging": {
   "label": "Panchromatic imaging",
   "description": "Imaging in a single broad spectral band covering most of the visible range (sometimes extending into the near infrared), giving one grey-level image, e.g. MRO CTX or the HiRISE RED channel.",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-Photogrammetry": {
   "label": "Photogrammetry",
   "description": "Deriving 3D geometry (e.g. a digital elevation model) by stereo-matching two or more overlapping images. The USGS Thesaurus only carries \"photogrammetry\" as a synonym of \"remote sensing\" itself; this PDSSP addition gives it its own addressable, narrower concept, which planetary DTM production specifically needs in order to be distinguished from plain imaging (see pdssp:ProductType-DigitalElevationModel).",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-RadarImaging": {
   "label": "Radar imaging",
   "description": "Active imaging with microwave pulses: the sensor emits pulses and measures the strength and delay of the echoes, e.g. synthetic aperture radar (Magellan at Venus).",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-RemoteSensing": {
   "label": "Remote sensing",
   "description": "Acquiring information about a body's surface, atmosphere or environment without being in contact with it, from orbiting, flyby, airborne or landed sensors.",
   "wider": [],
   "narrower": [
    "Method-AerialPhotography",
    "Method-HyperspectralImaging",
    "Method-InfraredImaging",
    "Method-Lidar",
    "Method-MicrowaveImaging",
    "Method-MultispectralImaging",
    "Method-PanchromaticImaging",
    "Method-Photogrammetry",
    "Method-RadarImaging",
    "Method-StereoscopicImaging",
    "Method-ThermalImaging",
    "Method-VisibleLightImaging"
   ]
  },
  "Method-StereoscopicImaging": {
   "label": "Stereoscopic imaging",
   "description": "Acquiring or combining two observations of the same site from different look angles for stereo (3D) viewing or measurement -- e.g. a red-cyan anaglyph. Distinct from pdssp:Method-Photogrammetry: photogrammetry MEASURES 3D geometry (elevation) from a stereo pair, while this concept covers producing a stereo pair/composite for viewing, with no elevation model necessarily derived. Not present in the USGS Thesaurus at all (no \"stereo\"/\"stereoscopic\" label anywhere in its RDF) -- a PDSSP addition.",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-ThermalImaging": {
   "label": "Thermal imaging",
   "description": "Imaging of the thermal radiation emitted by a surface (thermal infrared, about 3 to 50 \u00b5m), used to derive surface temperature and thermal inertia, e.g. Mars Odyssey THEMIS-IR.",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  },
  "Method-VisibleLightImaging": {
   "label": "Visible light imaging",
   "description": "Imaging of reflected sunlight in the visible part of the spectrum (about 0.4 to 0.7 \u00b5m).",
   "wider": [
    "Method-RemoteSensing"
   ],
   "narrower": []
  }
 }
}