| snippet:
|
This is a mosaic of color-infrared (CIR) aerial photography of the Suisun Marsh and FRP Area under very low tide conditions from June 2021. This work was performed by Towill, Inc. under DWR Contract 4600011239 Task Order 50. Raster resolution is 6 inches. The imagery has been orthorectified. |
| summary:
|
This is a mosaic of color-infrared (CIR) aerial photography of the Suisun Marsh and FRP Area under very low tide conditions from June 2021. This work was performed by Towill, Inc. under DWR Contract 4600011239 Task Order 50. Raster resolution is 6 inches. The imagery has been orthorectified. |
| accessInformation:
|
Towill, Inc. and California Department of Water Resources |
| thumbnail:
|
thumbnail/thumbnail.JPEG |
| typeKeywords:
|
["Data","Service","Image Service","ArcGIS Server"] |
| MinScale:
|
1.5E8 |
| description:
|
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This is a mosaic of color-infrared (CIR) aerial photography of the Suisun Marsh and FRP Area under very low tide conditions from June 2021. This work was performed by Towill, Inc. under DWR Contract 4600011239 Task Order 50. Raster resolution is 6 inches. Spatial reference is NAD 1983 State Plane Zone II. The imagery has been orthorectified.</SPAN></P><P><SPAN>Task 1 – Survey Control </SPAN></P><P><SPAN>Survey Control was based on ABGPS and CORS stations. In addition, photo control points were transferred from the 2018 orthophoto project (Task Order 24).</SPAN></P><P><SPAN>Task 2 – Airborne Data Acquisition</SPAN></P><P><SPAN>Four band (RGB-IR) imagery was acquired for the study area on June 8 and 10, 2021. The airborne mission was conducted as the following times:</SPAN></P><P><SPAN>June 8, 2021 - 11:04am to 1:31pm </SPAN></P><P><SPAN>June 10, 2021 - 9:42am to 12:21pm </SPAN></P><P><SPAN>The mission plan was based on the following parameters:</SPAN></P><P><SPAN>Camera: Vexcel UltraCAM Falcon Prime</SPAN></P><P><SPAN>Nominal Resolution: 13.5 cm</SPAN></P><P><SPAN>Altitude: 8000 ft AMT</SPAN></P><P><SPAN>Task 3 – Terrain Modeling </SPAN></P><P><SPAN>Terrain data used for the orthorectification process were supplied by lidar data from Task Order 28 (Suisun Marsh LiDAR Survey), the USGS 3D Elevation Program (3DEP), and updated where necessary by stereo-digitizing from the new aerial imagery. </SPAN></P><P><SPAN>Task 4 – Orthophoto Generation </SPAN></P><P><SPAN>Analytical aerotriangulation was performed on the imagery using INPHO's MATCH AT software. The orthorectification and mosaicking was performed using OrthoMaster and OrthoVista software. In accordance with typical mapping practice, the imagery was rectified at ground level. Therefore, the tops of above-ground features (such as rooftops, tops of structures, tops of trees, tops of poles, etc.) may not necessarily appear in their correct horizontal positions. The resolution of the orthophoto imagery is 0.5 ft.</SPAN></P><P><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. </SPAN></P><P><SPAN>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.</SPAN></P><P><SPAN>This Image Service was published on 09/28/2021, by Carlos Lewis of the DWR Division of Engineering, who may be contacted at 916-653-9815, or at carlos.lewis@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></DIV> |
| licenseInfo:
|
|
| catalogPath:
|
|
| title:
|
SuisunMarsh_2021_CIR |
| type:
|
Image Service |
| url:
|
https://parcgis.water.ca.gov/arcgisimgpublicmngr/services/Aerial_Photography/SuisunMarsh_2021_CIR/ImageServer |
| tags:
|
["Suisun Marsh","FRP Area","Aerial Photography","CIR","Orthorectified","Delta","2021"] |
| culture:
|
en-US |
| name:
|
SuisunMarsh_2021_CIR |
| guid:
|
|
| MaxScale:
|
5000.0 |
| spatialReference:
|
NAD_1983_StatePlane_California_II_FIPS_0402_Feet |