/vsicurl/https://rmbl-sdp.s3.us-east-2.amazonaws.com/data_products/basemaps/GT_ortho_basemap_20191115_v1.tif en dataset This is a visible (RGB) orthomosaic derived from UAV imagery via Structure from Motion processing. UAV flights were performed in Sunny conditions on November 15th, 2019, collecting RGB images using the built-in camera on a DJI Mavic 2 Pro. The raw imagery had an approximately 3cm ground sample distance (GSD). Images were processed in Agisoft Metashape Software (version 1.6) to derive a georeferenced dense point cloud and 3D model. Images were orthorectified and combined into a mosaic using the 3D model. This dataset has been georeferenced using 14 ground-control points, but has not been radiometrically calibrated. Biota Environment Geoscientific Information Imagery Base Maps Earth Cover 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 2020-07-19T23:32:08Z 2020-07-20T00:21:25Z