#--------------------------------------------------------------------------------------
#
# Level 3 data products 
# -- Higher level derived mapping products
#
#--------------------------------------------------------------------------------------


File list:
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1.  Species-level map: NGEEArctic_UAS_*_*_*_Vegetation_Species_Map.dat
    The species-level map was acquired using maximum likelihood classifier (MLC) in ENVI. The four-band combination of Osprey RGB and TIR products were 
    used as input for the classification. The map includes 11 classes (also refer to Yang et al., 2020):
        1. Siberian alder
        2. Diamond-leaf willow
        3. Resin birch
        4. Arctic dwarf birch
        5. Bog blurberry
        6. Mountain bearberry
        7. Black crowberry
        8. Alaskan mountain-avens
        9. Common cotton-grass
        10. Tussock cotton-grass
        11. Reindeer lichen
        12. Dark fruticose lichen
        13. Peat moss
        14. Dead matter
        15. Shadow
        16. Schist rock/soil
        17. Water
    Pixel resolution: 0.015 meters
    Spatial reference: WGS 84 / UTM zone 3N (EPSG:32603)

2.  NGEEArctic_UAS_*_*_*_Vegetation_Species_Map.json:
--  Spatial extent of the L3 georeferenced data product. geoJSON bounding polygon
    Spatial reference: Decimal Degrees, WGS84 (EPSG:4326)

3.  PFT-level map: NGEEArctic_UAS_*_*_*_PFT_Map.dat
    The PPT-level map was generated by merging species classes in the species-level map, according to Walker et al., (2000). The result include 5 PFTs and one 
    non-vegetation surface class:
        1. Deciduous tall shrub, including Siberian alder, Diamond-leaf willow, and Resin birch
        2. Deciduous low shrub, including Bog blueberry and Arctic dwarf birch
        3. Deciduous dwarf shrub, including Mountain crowberry
        4. Evergreen shrub, including Black crowberry and Alaskan mountain-avens
        5. Graminoid, including Tussock cotton-grass and Common cotton-grass
        6. Bryophyte, including Peat moss
        7. Lichen, including Dark fruticose lichen and Reindeer lichen
        6. Non-vegetation surface, including Schist rock, Water, and Shadow
    Pixel resolution: 0.015 meters
    Spatial reference: WGS 84 / UTM zone 3N (EPSG:32603)

4.  NGEEArctic_UAS_*_*_*_PFT_Map.json:
--  Spatial extent of the L3 georeferenced data product. geoJSON bounding polygon
    Spatial reference: Decimal Degrees, WGS84 (EPSG:4326)

References:
Yang, D. et al. (2020). A Multi-Sensor Unoccupied Aerial System Improves Characterization 
of Vegetation Composition and Canopy Properties in the Arctic Tundra. Remote Sensing.

Walker, D.A. Hierarchical subdivision of Arctic tundra based on vegetation response to 
climate, parent material and topography. Global Change Biol 2000, 6, 19–34, 
doi:10.1046/j.1365-2486.2000.06010.x.