Peter Dartnell
Amy E. East
20210702
Bathymetric data for Whiskeytown Lake, December 2018
2.0
GeoTIFF
data release
DOI:10.5066/P9HEDYNT
Pacific Coastal and Marine Science Center, Santa Cruz, California
U.S. Geological Survey
https://doi.org/10.5066/P9HEDYNT
https://www.sciencebase.gov/catalog/item/5dfbd23fe4b0cc5243395f60
Joshua B. Logan
Peter Dartnell
Amy E. East
Andrew C. Ritchie
2020
Bathymetry, topography and orthomosaic imagery for Whiskeytown Lake, northern California
2.0
data release
DOI:10.5066/P9HEDYNT
Pacific Coastal and Marine Science Center, Santa Cruz, CA
U.S. Geological Survey
https://doi.org/10.5066/P9HEDYNT
https://www.sciencebase.gov/catalog/item/5dfbba2fe4b0b5e61c073327
These metadata describe bathymetric data collected during a December 2018 SWATHPlus survey of Whiskeytown Lake, California. Data were collected and processed by the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) during fieldwork activity number 2018-686-FA. The bathymetric data are provided as a GeoTIFF image.
Three separate SWATHPlus surveys were conducted in Whiskeytown Lake in December 2018, May 2019, and September 2020 to measure possible debris flows into the lake during the 2018-2019 rainy season following the July-August 2018 Carr fire that burned vegetation around the entire lake. Post-fire hillslope sediment yields are commonly substantially greater than pre-fire yields, but the degree to which they increase can vary substantially. Effects of wildfire on sediment yield have important implications for hazards (debris-flow risk), ecosystem disturbance and recovery, and downstream water resources (storage capacity in lakes, as well as water quality). These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify bathymetric features. These data are not intended to be used for navigation.
Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-686-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.
20181211
20181214
ground condition at time data were collected.
As needed
-122.595
-122.522
40.653
40.597
USGS Metadata Identifier
USGS:5dfbd23fe4b0cc5243395f60
Global Change Master Directory (GCMD)
Bathymetry
Seafloor Topography
ISO 19115 Topic Category
geoscientificInformation
USGS Thesaurus
bathymetry
bathymetry measurement
lakebed characteristics
geospatial datasets
marine geophysics
interferometric sonar
Data Categories for Marine Planning
Bathymetry and Elevation
Marine Realms Information Bank (MRIB) keywords
lake bed
field observation
none
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
Geographic Names Information System (GNIS)
State of California
Whiskeytown-Shasta-Trinity National Recreation Area
Whiskeytown Lake
None
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originators of the dataset and in products derived from these data. This information is not intended for navigation purposes.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
https://www.sciencebase.gov/catalog/file/get/5dfbd23fe4b0cc5243395f60?name=Whiskeytown_2018_bathy_QV.jpg
Quick view image of the Whiskeytown Lake 2018 bathymetric data
JPEG
Caris HIPS and SIPS (ver. 11) and ArcMap (ver. 10.3.1) on a Windows 7 computer.
The depth accuracy of the 234-kHz SWATHPlus sonar system reduces with horizontal range. The system has an estimated vertical depth uncertainty ranging from about 0.05 m to 0.34 m over a horizontal range of 0 to 90 m (http://www.bathyswath.com/sites/default/files/documents/ETD_2002_Bathyswath%20information_EN.pdf). Accuracies of final products may be lower due to total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
No formal logical accuracy tests were conducted.
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
The Applanix POS-MV post-processed horizontal positional accuracy is about 0.1 m with roll and pitch accuracies of about 0.02 degrees (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-WaveMaster-II.pdf). The SWATHPlus sonar system has an across-track resolution of about 5 cm (http://www.bathyswath.com/sites/default/files/documents/ETD_2002_Bathyswath%20information_EN.pdf). Accuracies of final products may be lower due to total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
The Applanix POS-MV post-processed vertical positional accuracy is about 0.2 m (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-WaveMaster-II.pdf). The SWATHPlus sonar system has a measurement resolution limit of about 0.6 cm and a resolution detection limit of about 3 mm (http://www.bathyswath.com/sites/default/files/documents/ETD_2002_Bathyswath%20information_EN.pdf). Accuracies of final products may be lower due to total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
The Swath bathymetric survey was conducted with a SWATHplus-M 234-kHz interferometric side-scan sonar system pole-mounted on the U.S. Geological Survey (USGS) R/V San Lorenzo. During the mapping mission, an Applanix POS-MV (Position and Orientation System for Marine Vessels) was used to position the vessel during data collection, and it also accounted for vessel motion such as heave, pitch, and roll. The POS-MV also recorded position and vessel motion parameters for later post-processing. Sound-velocity profiles were collected throughout the survey days with a Castaway sound velocimeter. Post-processed POS-MV Smoothed Best Estimate of Trajectory (SBET) files were merged with the survey line files using BathySwath software and then the line files were imported into Caris HIPS and SIPS software. Soundings were cleaned for obvious errors and gridded into a 2-m base surface. The base surface was exported as an XYZ ascii file in UTM-10 coordinates referenced to the WGS84 ellipsoid. The ascii file was transformed to UTM-10, NAD83(2011) coordinates relative NAVD88 using VDatum software (version 3.7).
2019
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
20201019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
The Swath bathymetry data were gridded into a 1-m resolution raster, then exported to a TIFF file following the same steps as with the 2-m resolution data (above) and added to the data release. The Entity and Attribute Overview section of the metadata was revised accordingly. Additional survey data for 2020 was added to the overall data release, so minor edits were made to the Purpose section of the metadata to refer to the new data.
2021
Raster
Universal Transverse Mercator
10
0.9996
-123.00000
0.00000
500000.0
0.00
coordinate pair
2.0
2.0
Meters
North American Datum of 1983, 2011 realization (NAD83(2011))
GRS80
6378137.00
298.257222101
North America Vertical Datum of 1988 (NAVD88)
0.1
meters
Explicit elevation coordinate included with horizontal coordinates
value
depth in meters relative to NAVD88 datum
Producer defined
The complete 2018 1-m resolution grid "Whiskeytown_2018_1m_bathy_NAD83_NAVD88.tif" was originally archived as a TIFF image with the following attributes.
>Cell size = 1.0
>Number of rows = 5903
>Number of columns = 5501
>
>Data type = floating point
>
>Boundary
>Xmin = 534491
>Xmax = 539992
>Ymin = 4494260
>Ymax = 4500163
>
>Statistics
>Minimum value = 295.5
>Maximum value = 366.2
>Mean = 342.6
>Standard deviation = 13.8
>
>Coordinate system description
>Projection UTM
>Zone 10
>Datum NAD83(2011)
>Vertical Reference NAVD88
>Units meter
The complete 2018 2-m resolution grid "Whiskeytown_2018_2m_bathy_NAD83_NAVD88.tif" was originally archived as a TIFF image with the following attributes.
>Cell size = 2.0
>Number of rows = 2951
>Number of columns = 2752
>
>Data type = floating point
>
>Boundary
>Xmin = 534490
>Xmax = 539994
>Ymin = 4494259
>Ymax = 4500161
>
>Statistics
>Minimum value = 295.9
>Maximum value = 366.1
>Mean = 342.9
>Standard deviation = 13.9
>
>Coordinate system description
>Projection UTM
>Zone 10
>Datum NAD83(2011)
>Vertical Reference NAVD88
>Units meter
U.S. Geological Survey
U.S. Geological Survey - ScienceBase
Mailing and Physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
1-888-275-8747
sciencebase@usgs.gov
These data are available in GeoTIFF format, including a tif world file (.tfw) and CSDGM FGDC-compliant metadata.
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
GeoTIFF
ArcMap (version 10.3.1)
Downloadable zip file contains the TIFF (.tif), and the tif world file (.tfw).
WinZip
5.2
https://www.sciencebase.gov/catalog/file/get/5dfbd23fe4b0cc5243395f60?name=Whiskeytown_2018_2m_bathy_NAD83_NAVD88.zip
https://www.sciencebase.gov/catalog/item/5dfbd23fe4b0cc5243395f60
https://doi.org/10.5066/P9HEDYNT
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of the 2-m bathymetry data in GeoTIFF format. The second link points to a landing page with all of the 2018 bathymetry data, metadata, and a browse image. The third link points to the landing page for the entire data release, including links to pages of the various data files.
GeoTIFF
ArcMap (version 10.3.1)
Downloadable zip file contains the TIFF (.tif), and the tif world file (.tfw).
WinZip
26.1
https://www.sciencebase.gov/catalog/file/get/5dfbd23fe4b0cc5243395f60?name=Whiskeytown_2018_1m_bathy_NAD83_NAVD88.zip
https://www.sciencebase.gov/catalog/item/5dfbd23fe4b0cc5243395f60
https://doi.org/10.5066/P9HEDYNT
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of the 1-m bathymetry data in GeoTIFF format. The second link points to a landing page with the all the bathymetry data, metadata, and a browse image. The third link points to the landing page for the entire data release, including links to pages of the various data files.
None.
The downloadable data file has been compressed with the "zip" command and can be unzipped with Winzip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing a GeoTIFF file.
20210702
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998