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OldRiver_20200519_2
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37.779378
The primary purpose is to quantify floating and submerged aquatic vegetation in the channel. Data were collected on 5/19/2020 1145-1215 PST.
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>Imagery Acquisition:The imagery was collected using a DJI Mavic 2 Pro UAS, operating at 250’ above ground level, along one single flight line following the center line of Old River from 1.5 miles downstream of Tracy road to River’s End. The field collection was controlled by a DJI Smart Controller running the DJI Pilot app.</SPAN></P><P><SPAN>Software Processing: Images were imported into ArcGIS Pro 2.5 using the Ortho Mapping workspace tool, block adjusted, and an Orthomosaic was generated. No external control points were used for this project.</SPAN></P><P><SPAN>Adjustment summary from ArcGIS Pro:Number of Adjusted Images 817Number of Tie Points 590502 Number of Solution Points 29728 Mean Reprojection Error (pixel) 0.39 Ground Resolution (m/pixel) 0.018 Adjustment Type Frame Ground Control Points Involved in Adjustment No</SPAN></P><P><SPAN>This is an official DWR Image Service, which meets all appropriate requirements of theDWR Spatial Data Standards, specifically the DWR Spatial Data Standard version 3.1,dated September 11, 2019.DWR makes no warranties or guarantees —either expressed or implied— as to the completeness, accuracy, or correctness of the data. DWR neither accepts nor assumes liability arising from or for any incorrect, incomplete, or misleading subject data.This Image Service was published on 6/1/2020, by Gregory Twist of the DWR Division of Engineering, who may be contacted at 916-653-2700, or at gregory.twist@water.ca.gov. Comments, problems, improvements, updates, or suggestions should be forwarded to the official DWR point of contact as available and appropriate.</SPAN></P></DIV></DIV>
Michael Baldwin, P.E., California Department of Water Resources, NCRO
Old River
Delta
California
orthomosaic
UAV
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>public domain</SPAN></P></DIV></DIV>
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