{ "currentVersion": 11.3, "serviceDescription": "Imagery Acquisition:The imagery was collected using a DJI Mavic 2 Pro UAS, operating at 300\u2019 above ground level, along two passes to fully cover the channel of Grant Line Canal from Doughty Cut to Tracy Oasis. The field collection was controlled by a DJI Smart Controller running the DJI Pilot app.Software Processing:Images were imported into ArcGIS Pro 2.6 using the Ortho Mapping workspace tool, block adjusted, and an Orthomosaic was generated. No external control points were used for this project.Adjustment summary from ArcGIS Pro:Number of Adjusted Images1205Number of Tie Points5598565Number of Solution Points1958637Mean Reprojection Error (pixel)0.17Ground Resolution (m/pixel)0.022Adjustment TypeFrameGround Control Points Involved in AdjustmentNoDWR makes no warranties or guarantees \u2014either expressed or implied\u2014 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 11/4/2020, 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.", "name": "Aerial_Photography/GrantLine_20201029", "description": "Imagery Acquisition:The imagery was collected using a DJI Mavic 2 Pro UAS, operating at 300\u2019 above ground level, along two passes to fully cover the channel of Grant Line Canal from Doughty Cut to Tracy Oasis. The field collection was controlled by a DJI Smart Controller running the DJI Pilot app.Software Processing:Images were imported into ArcGIS Pro 2.6 using the Ortho Mapping workspace tool, block adjusted, and an Orthomosaic was generated. 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