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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2021-607-FA

AKA: SQUID5 system testing Tahoe Reef

Other ID: none

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Other (Other)

Principal Investigator(s): Gerry Hatcher

Affiliate Investigator(s): Brant Allen, Field Lab Director and Boat Captain. UC Davis. S. Geoffrey Schladow, PhD, UC Davis

Information Specialist(s): Peter Dal Ferro

Data Type(s): Location-Elevation: Navigation, Imagery: Photo

Scientific Purpose/Goals: Field testing of modifications/updates to the SQUID-5 underwater structure from motion mapping vehicle

Vehicle(s): MarFac; Chevy 9 pass. van - green G42-0422G, MarFac; Expedition G62-3094P

Start Port/Location: Tahoe City, CA

End Port/Location: Tahoe City, CA

Start Date: 2021-03-08

End Date: 2021-03-12

Equipment Used: Trimble R7 GPS receiver, SQUID-5

Information to be Derived: Lake bed elevation and orthoimagery

Summary of Activity and Data Gathered: Successfully collected high resolution lakebed imagery and associated navigation for processing with Structure from Motion (SfM) software.


Affiliate Staff:

Notes: Entries for this field activity are based on entries from Field Activity 2020-634-FA


Lake Tahoe, CA near Tahoe City

North: 39.19346594 South: 39.15642106 West: -120.1521492 East: -120.08022308


photo of Boat


Hatcher, G.A., Warrick, J.A., Kranenburg, C.J., Dal Ferro, P., 2021, Overlapping lakebed images and associated GNSS locations acquired near Dollar Point, Lake Tahoe, CA, March 2021: U.S. Geological Survey data release,

Warrick, J.A., Hatcher, G.A., and Kranenburg, C.J., 2021, Point clouds, bathymetric maps, and orthoimagery generated from overlapping lakebed images acquired with the SQUID-5 system near Dollar Point, Lake Tahoe, CA, March 2021: U.S. Geological Survey data release,


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Trimble R7 GPS receiver --- Benchmarks
SQUID-5 --- Photo

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