Bathymetric data for Whiskeytown Lake, September 2020

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Amy E. East
Publication_Date: 20210702
Title: Bathymetric data for Whiskeytown Lake, September 2020
Geospatial_Data_Presentation_Form: GeoTIFF
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9HEDYNT
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/P9HEDYNT
Online_Linkage: Citation_Information Originator
Description:
Abstract:
These metadata describe bathymetric data collected during a September 2021 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.
Purpose:
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 and 2019-2020 rainy seasons 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.
Supplemental_Information:
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=2020-627-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.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20200914
Ending_Date: 20200917
Currentness_Reference: ground condition at time data were collected.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.595
East_Bounding_Coordinate: -122.522
North_Bounding_Coordinate: 40.653
South_Bounding_Coordinate: 40.597
Keywords:
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Bathymetry
Theme_Keyword: Seafloor Topography
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: bathymetry measurement
Theme_Keyword: lakebed characteristics
Theme_Keyword: geospatial datasets
Theme_Keyword: marine geophysics
Theme_Keyword: interferometric sonar
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: lake bed
Theme_Keyword: field observation
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:6052599bd34e7eb1cb3eb498
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: State of California
Place_Keyword: Whiskeytown-Shasta-Trinity National Recreation Area
Place_Keyword: Whiskeytown Lake
Access_Constraints: None
Use_Constraints:
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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Person: PCMSC Science Data Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description: Quick view image of the Whiskeytown Lake 2020 bathymetric data
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
Caris HIPS and SIPS (ver. 11) and ArcMap (ver. 10.3.1) on a Windows 7 computer.
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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.
Logical_Consistency_Report: No formal logical accuracy tests were conducted.
Completeness_Report:
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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
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.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
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.
Lineage:
Process_Step:
Process_Description:
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) integrated with GPS 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 1-m and 2-m base surfaces. The base surfaces were exported as XYZ ascii files in UTM-10 coordinates referenced to the WGS84 ellipsoid. The ascii files were transformed to UTM-10, NAD83(2011) coordinates relative to NAVD88 using VDatum software (version 3.7). The transformed XYZ ascii files were gridded into 1-m and 2-m resolution surfaces using Fledermaus software (version 7.8), converted to ASCIIRaster files and imported into Esri ArcMap (version 10.3.1). The bathymetry grids were then exported as TIFF files in UTM zone 10, NAD-83(2011) coordinates, relative to NAVD88.
Process_Date: 2021
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 10
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.00000
Latitude_of_Projection_Origin: 0.00000
False_Easting: 500000.0
False_Northing: 0.00
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 2.0
Ordinate_Resolution: 2.0
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983, 2011 realization (NAD83(2011))
Ellipsoid_Name: GRS80
Semi-major_Axis: 6378137.00
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North America Vertical Datum of 1988 (NAVD88)
Altitude_Resolution: 0.1
Altitude_Distance_Units: meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: value
Entity_Type_Definition: depth in meters relative to NAVD88 datum
Entity_Type_Definition_Source: Producer defined
Overview_Description:
Entity_and_Attribute_Overview:
The complete 2020 1-m resolution grid "Whiskeytown_2020_1m_bathy_NAD83_NAVD88.tif" was originally archived as a TIFF image with the following attributes.
Cell size = 1.0
Number of rows = 5937
Number of columns = 5523

Data type = floating point

Boundary
Xmin = 534511
Xmax = 540034
Ymin = 4494240
Ymax = 4500177

Statistics
Minimum value = 296.0
Maximum value = 369.3
Mean = 343.9
Standard deviation = 14.3

Coordinate system description
Projection  UTM
Zone  10
Datum  NAD83(2011)
Vertical Reference NAVD88
Units  meter
The complete 2020 2-m resolution grid "Whiskeytown_2020_2m_bathy_NAD83_NAVD88.tif" was originally archived as a TIFF image with the following attributes.
Cell size = 2.0
Number of rows = 2969
Number of columns = 2762

Data type = floating point

Boundary
Xmin = 534510
Xmax = 540034
Ymin = 4494239
Ymax = 4500177

Statistics
Minimum value = 296.0
Maximum value = 369.3
Mean = 343.9
Standard deviation = 14.3

Coordinate system description
Projection  UTM
Zone  10
Datum  NAD83(2011)
Vertical Reference NAVD88
Units  meter
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - ScienceBase
Contact_Address:
Address_Type: Mailing and Physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
These data are available in GeoTIFF format, including a tif world file (.tfw) and CSDGM FGDC-compliant metadata.
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
Format_Version_Number: ArcMap (version 10.3.1)
Format_Information_Content:
Downloadable zip file contains the TIFF (.tif), and the tif world file (.tfw)..
File_Decompression_Technique: WinZip
Transfer_Size: 7.4
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
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 2020 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.
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
Format_Version_Number: ArcMap (version 10.3.1)
Format_Information_Content:
Downloadable zip file contains the TIFF (.tif), and the tif world file (.tfw)..
File_Decompression_Technique: WinZip
Transfer_Size: 27.8
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
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 all of the 2020 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.
Fees: None.
Technical_Prerequisites:
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.
Metadata_Reference_Information:
Metadata_Date: 20210702
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Person: PCMSC Science Data Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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