Spatial Extent of Data
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ISO 19115 Topic Category
Topographic digital surface model (DSM) for Whiskeytown Lake and surrounding area, 2018-12-02
This portion of the data release presents a digital surface model (DSM) and hillshade of Whiskeytown Lake and the surrounding area derived from Structure from Motion (SfM) processing of aerial imagery acquired on 2018-12-02. Unlike a digital elevation model (DEM), the DSM represents the elevation of the highest object within the bounds of a cell. Vegetation, buildings and other objects have not been removed from the data. In addition, data artifacts resulting from noise and vegetation in the original imagery have not been removed. However, in unvegetated areas such as reservoir shorelines and deltas, the DSM is equivalent to a DEM because it represents the ground surface elevation. The raw imagery used to create this DSM was acquired from a manned aircraft on 2018-12-02. The acquisition flight was conducted by The 111th Group Aerial Photography, using a Nikon D850 camera. The imagery was acquired from an approximate altitude of 610 meters (2,000 feet) above ground level, to produce a nominal ground sample distance (pixel size) of 5 centimeters (2 inches). An onboard single-frequency GPS receiver was used to record the precise time and position of each image. Coordinates for ground control points consisting of photo-identifiable objects were measured independently using survey-grade post-processed kinematic (PPK) GPS.
Author(s) |
Joshua Logan |
Publication Date | 2020-05-27 |
Beginning Date of Data | 2018-12-02 |
Ending Date of Data | 2018-12-02 |
Data Contact | |
DOI | https://doi.org/10.5066/P9HEDYNT |
Citation | Logan, J., Dartnell, P., East, A., and Ritchie, A.C., 2020, Topographic digital surface model (DSM) for Whiskeytown Lake and surrounding area, 2018-12-02: U.S. Geological Survey data release, https://doi.org/10.5066/P9HEDYNT. |
Metadata Contact | |
Metadata Date | 2020-10-19 |
Related Publication | There was no related primary publication associated with this data release. |
Citations of these data | No citations of these data are known at this time. |
Access | public |
License | http://www.usa.gov/publicdomain/label/1.0/ |
Harvest Date: 2025-01-22T04:21:20.072Z