Aerial_Photography/OldRiver_20210421

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Service Description: Purpose: Primary purpose is to quantify floating and submerged aquatic vegetation in the channel. Survey Date and Time: Data was collected on 4/21/2021 1145-1230 PST 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. Software Processing: Images were imported into ArcGIS Pro 2.7.3 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 Images 1631 Number of Tie Points 3191598 Number of Solution Points 1181816 Mean Reprojection Error / Sigma Naught (pixel) 0.29 / 0.44 Ground Resolution (m/pixel) 0.017 Adjustment Type Frame Ground Control Points Involved in Adjustment No 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 4/28/2021, by Joel Dudas of the DWR Division of Engineering, who may be contacted at 916-651-7002, or at joel.dudas@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/OldRiver_20210421_2

Description: Purpose: Primary purpose is to quantify floating and submerged aquatic vegetation in the channel. Survey Date and Time: Data was collected on 4/21/2021 1145-1230 PST 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. Software Processing: Images were imported into ArcGIS Pro 2.7.3 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 Images 1631 Number of Tie Points 3191598 Number of Solution Points 1181816 Mean Reprojection Error / Sigma Naught (pixel) 0.29 / 0.44 Ground Resolution (m/pixel) 0.017 Adjustment Type Frame Ground Control Points Involved in Adjustment No 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 4/28/2021, by Joel Dudas of the DWR Division of Engineering, who may be contacted at 916-651-7002, or at joel.dudas@water.ca.gov. Comments, problems, improvements, updates, or suggestions should be forwarded to the official DWR point of contact as available and appropriate.

Single Fused Map Cache: false

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Pixel Size Y: 0.01599999999999913

Band Count: 3

Pixel Type: U8

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Mensuration Capabilities: Basic

Inspection Capabilities:

Has Histograms: true

Has Colormap: false

Has Multi Dimensions : false

Rendering Rule:

Min Scale: 0

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Copyright Text: Michael Baldwin, P.E., California Department of Water Resources, NCRO

Service Data Type: esriImageServiceDataTypeRGB

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Mean Values: 88.42677606102384, 91.63477235621443, 72.07165385868132

Standard Deviation Values: 38.74726727315003, 34.349193265084, 33.5440514398227

Object ID Field:

Fields: None

Default Mosaic Method: Center

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Mosaic Operator: First

Default Compression Quality: 75

Default Resampling Method: Bilinear

Max Record Count: null

Max Image Height: 4100

Max Image Width: 15000

Max Download Image Count: null

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Allow Raster Function: true

Allow Copy: true

Allow Analysis: true

Allow Compute TiePoints: false

Supports Statistics: false

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Use StandardizedQueries: true

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Edit Fields Info: null

Ownership Based AccessControl For Rasters: null

Child Resources: Info Histograms Statistics Key Properties Legend Raster Function Infos

Supported Operations: Export Image Identify Measure Compute Histograms Compute Statistics Histograms Get Samples Compute Class Statistics Query Boundary Compute Pixel Location Compute Angles Validate Project

Aerial_Photography/OldRiver_20210421_2 (ImageServer)