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Photograph taken from the ground showing the placement of a UAS ground control target at the North Santiam River

By Geosciences and Environmental Change Science Center August 2021 (approx.)
Photograph taken from the ground showing the placement of a UAS ground control target at the North Santiam River
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Detailed Description

Photograph taken from the ground showing the placement of a UAS ground control target at the North Santiam River

The USGS Oregon Water Science Center teamed up with the NUSO in August 2021 to explore bathymetric and remote sensing techniques to detect periphyton, a complex mixture of algae, cyanobacteria, and microbes in freshwater ecosystems. 

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Public Domain.