Person

Christopher Holmquist-Johnson

Hydrologist

Fort Collins Science Center

Email: h-johnsonc@usgs.gov
Office Phone: 970-226-9382
Fax: 970-226-9230
ORCID: 0000-0002-2782-7687

Location
NRRC Bldg C
2150 Centre Avenue
Building C
Fort Collins , CO 80526-8118
US

Supervisor: Sara J Oyler-McCance

45 items:

Vegetation classification model (Veg) for basin A1 Vegetation classification model (Veg) and associated metadata for basin A1. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Colorado, Rio Blanco, UAS, Unmanned Aerial Systems, biota, All tags...
Digital terrain model (DTM) for basin B1 Digital terrain model (DTM) and associated metadata for basin B1. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Colorado, Rio Blanco, UAS, Unmanned Aerial Systems, biota, All tags...
Final surface model (SRF) for basin B1 Final surface model (SRF) and associated metadata for basin B1. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Colorado, Rio Blanco, UAS, Unmanned Aerial Systems, biota, All tags...
Orthoimagery and elevation data derived from UAS imagery for Palmyra Atoll, USA 2016-Fighter Strips This data set includes a point cloud, digital surface model (DSM), and orthoimagery of the Fighter Strips at Palmyra Atoll, USA. Products were generated from aerial images collected in October 2016 using Unoccupied Aerial Systems (UAS, or "drones") with a Ricoh GRII digital camera. Imagery was processed using structure-from-motion photogrammetry that generates a three dimensional point cloud (.las) by identifying pixels from multiple images representing the same object and calculating the x, y, and z coordinates of that object/pixel. Point cloud data were processed to create a 6.3 cm resolution DSM (.tif) of the uppermost reflective surface (i.e., data have not been filtered for vegetation classes or height). Finally,... Tags: Northern Line Islands, Pacific Ocean, Palmyra Atoll, elevation, imageryBaseMapsEarthCover, All tags... oceans, Fewer tags
Orthoimagery for basin A2 Orthoimagery and associated metadata for basin A2. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Colorado, Rio Blanco, UAS, Unmanned Aerial Systems, biota, All tags...

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