D:/SDP_S3_Uploads/draft_products/UG_canopy_ht20_3m_v2.tif en dataset This is a map of 20th percentile canopy height above the ground for the Upper Gunnison River Basin based on 2015 and 2019 LiDAR data. Height is measured in meters. This dataset was generated from the terrain-normalized point clouds using functions in the R package lidR. The ground-classified points were first used to generate a bare-earth surface, which was subtracted from the point cloud elevation to generate a terrain-normalized point cloud. 80th percentile heights were calculated for the LiDAR returns in each pixel using a kernel density method implemented using the quantile() R function. Artifacts from steep topography and structures have not been removed from this dataset. Elevation Environment Geoscientific Information Ian Breckheimer Rocky Mountain Biological Laboratory Research Scientist ikb@rmbl.org owner Creative Commons Attribution 4.0 PROJCRS["WGS 84 / UTM zone 13N",BASEGEOGCRS["WGS 84",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4326]],CONVERSION["UTM zone 13N",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",-105,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",0.9996,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",500000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["unknown"],AREA["World - N hemisphere - 108°W to 102°W - by country"],BBOX[0,-108,84,-102]],ID["EPSG",32613]] +proj=utm +zone=13 +datum=WGS84 +units=m +no_defs 3097 32613 EPSG:32613 WGS 84 / UTM zone 13N utm EPSG:7030 false