| Identifier | 2015-642-FA | ||||||||
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| Purpose | Baseline Topographic and Bathymetric survey of Little Holland Tract | ||||||||
| Location | Rio Vista, CA Little Holland Tract, Sacramento River Delta | ||||||||
| Summary | A. Stevens submitted base, bathy, photos, svp, and topo with readme file 6/12/15. A. Snyder submitted gis folder to FAD 9/28/2015 | ||||||||
| Info derived | Combined topographic/bathymetric map of Little Holland Tract. | ||||||||
| Comments | First day in field is for topographic surveys and to recon for appropriate bathy survey vessel. Follow-up field days to finish topo and bathy | ||||||||
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| Vehicles | MarFac; Chevy Suburban - gray; 7 pass; G62-2874L |
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| Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
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| Principal investigators | Jessica R Lacy | ||||||||
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| Data category: | Location-Elevation, Sonar |
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| Data type: | Navigation, Transects, Single Beam |
| Equipment | Usage description | Data types | Datasets |
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| Trimble R7 GPS (AS) | Benchmarks, Navigation, Profiles, Transects | 2 | |
| Waverunners | Navigation, Single Beam | 2 |
| Dataset name | Equipment | Description | Dataset contact |
|---|---|---|---|
| Digital elevation model of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015 | Trimble R7 GPS (AS) | This product is a digital elevation model (DEM) for the Little Holland Tract in the Sacramento-San Joaquin River Delta, California based on U.S. Geological Survey (USGS)-collected elevation data, merged with existing topographic and bathymetric elevation data. The USGS collected topographic and bathymetric elevation data in 2015, using a combination of methods. Topographic and shallow-water bathymetric data were collected on foot using a global positioning system (GPS) backpack platform that consisted of survey-grade Trimble R10, and Trimble R7 global navigation satellite system (GNSS) receivers with Zephyr 2 antennas. Bathymetric data were collected using a personal watercraft (PWC) platform that consisted of Trimble R7 GNSS receivers with Zephyr 2 antennas, combined with Odom Echotrac CV-100 single-beam echosounders and 200 kHz transducers. The USGS elevation data were merged with topographic aerial Light Detection and Ranging (lidar) data collected by California Department of Water Resources (DWR) in 2007 and single-beam bathymetric data collected by Environmental Data Solutions (EDS) in 2009 to generate the final DEM. The GeoTIFF raster and comma-delimited text files are available for download at http://doi.org/10.5066/F7RX9954. | Alexander G Snyder |
| topo data | Trimble R7 GPS (AS) | published in Science Base, U.S. Geological Survey data release, DOI: 10.5066/F7RX9954 | Alexander G Snyder |
| bathy data | Waverunners | published in Science Base; U.S. Geological Survey data release, DOI: 10.5066/F7RX9954 | Alexander G Snyder |
| Dataset name | Equipment | Description | Dataset contact |
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| Digital elevation model (DEM) of the Cache Slough Complex, Sacramento-San Joaquin Delta, California | Waverunners | This metadata describes a digital elevation model (DEM) created from bathymetric and topographic data collected between 2004 and 2019 in the Cache Slough Complex (CSC), northern Sacramento-San Joaquin Delta, California. We merged the newly collected bathymetric and topographic data presented in this data release (DOI:10.5066/P9AQSRVH) with 2019 surveys by the California Department of Water Resources (DWR), 2017 USGS Sacramento Delta Lidar, and 2004 bathymetry data from the Army Corp of Engineers. Small gaps of missing data were filled with existing DWR/USGS Delta DEMs to produce a seamless DEM of the Cache Slough Complex with a grid resolution of 1 m. Remaining gaps in the DEM are areas where there is currently no available data. | Theresa Fregoso |
