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FGDC CSDGM Metadata
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MiddleRiver_20200806_3
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37.890066
37.880695
Middle River
Delta
vegetation
orthomosaic
UAV
The primary purpose is to quantify floating and submerged aquatic vegetation in the channel. Data were collected on 8/6/2020 1045-1130 PST
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>Imagery Acquisition:The imagery was collected using a DJI Mavic 2 Pro UAS, operating at 400’ above ground level, along two passes to fully cover the channel of Middle River from Tracy Blvd to Victoria Canal. 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 2.5.1 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 730 Number of Tie Points 1302939 Number of Solution Points 214439 Mean Reprojection Error (pixel) 0.31 Ground Resolution (m/pixel) 0.029 Adjustment Type Frame</SPAN></P><P><SPAN>This is an official DWR Image Service, which meets all appropriate requirements of the DWR 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 8/10/2020, 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
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>public domain</SPAN></P></DIV></DIV>
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