Surface sediment grain size distributions derived from automated image processing of in situ seafloor images from the lower Columbia River, Washington and Oregon, 2021

Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Andrew W. Stevens
Originator: Jonathan A. Warrick
Originator: Gerald A. Hatcher
Originator: Peter Dal Ferro
Originator: Peter Dartnell
Originator: Nicholas Cohn
Originator: Hans R. Moritz
Publication_Date: 20230808
Title:

Surface sediment grain size distributions derived from automated image processing of in situ seafloor images from the lower Columbia River, Washington and Oregon, 2021

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/10.5066/P92U1KPY

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/P92U1KPY
Larger_Work_Citation:

Citation_Information:

Originator: Andrew W. Stevens
Originator: Gerald A. Hatcher
Originator: Peter Dal Ferro
Originator: Peter Dartnell
Originator: Jonathan A. Warrick
Originator: Nicholas Cohn
Originator: Hans R. Moritz
Publication_Date: 2023
Title:

Digital seafloor images, sediment grain size, bathymetry, and water velocity data from the lower Columbia River, Washington and Oregon, 2021

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P92U1KPY

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Other_Citation_Details:

Suggested Citation: Suggested Citation: Stevens, A.W., Hatcher, G.A., Dal Ferro, P., Warrick, J.A., Cohn, N., and Moritz, H.R., 2023, Digital seafloor images, sediment grain size, bathymetry, and water velocity data from the lower Columbia River, Washington and Oregon, 2021: U.S. Geological Survey data release, https://doi.org/10.5066/P92U1KPY.

Online_Linkage: https://doi.org/10.5066/P92U1KPY

Description:

Abstract:

This dataset contains surface sediment grain size distributions derived from automated image processing of in situ seafloor images obtained with an underwater camera system at four sites (SKM, SLG, LDB, WLW) in the lower Columbia River, Washington and Oregon, in 2021. The surface sediment grain size distribution data are provided in comma-separated text (.csv) format for each site and for data used in calibration and validation of the automated image processing technique.

Purpose:

Growth of subaqueous sand dunes commonly causes shoaling in engineered river channels that necessitates costly dredging to maintain adequate depths for navigation. The factors that result in sand wave growth are theoretically understood from laboratory experiments, but the capacity to predict sand wave geometries in field settings is limited due to temporal and spatial variability in hydrodynamics and sediment grain size. Detailed measurements of sand wave geometries, hydrodynamics, and grain size are therefore needed to test and improve numerical models and inform efficient management strategies in navigation channels. This data release presents surface sediment grain size distributions, bathymetry and seafloor acoustic backscatter, and water velocity data acquired at four sites with subaqueous sand dunes in the lower Columbia River, Washington and Oregon, between June 4 and June 9, 2021. The four sites were located between 65 km and 127 km upstream from the ocean inlet along a gradient of relative tidal and fluvial influence. The survey was performed during peak annual river discharge when sediment transport processes were likely active. High resolution digital images were collected at each site with an underwater camera system that was repeatedly lowered to the seabed along a series of 1 km-long transects oriented along the main navigation channel and spaced about 60 m apart. The grain size distributions of the seabed images were estimated using an automated image processing technique and tested with observed grain size distributions derived from manual measurements on a subset of 16 images. Swath bathymetry and seafloor acoustic backscatter data were collected repeatedly at each site using a 234.5 kHz phase-differencing sidescan sonar to characterize sand wave geometry and bathymetric change resulting from sand wave migration. Current velocity data were collected from an underway survey vessel equipped with a downward looking 600 kHz ADCP along transects oriented both along- and across the main navigation channel. Combined, these data provide a comprehensive characterization of mobile subaqueous sand dunes that can be used to improve predictions of dune growth in complicated field settings and inform efficient sediment management practices in the lower Columbia River.

Supplemental_Information:

Additional information about the field activity or activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-621-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20210605
Ending_Date: 20210608

Currentness_Reference: ground condition at time data were collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -123.442574
East_Bounding_Coordinate: -122.762951
North_Bounding_Coordinate: 46.250242
South_Bounding_Coordinate: 45.712673

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:339f55f9-663c-4795-b2b5-1949d79d86b0

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Substrate

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: ocean processes
Theme_Keyword: sediment transport
Theme_Keyword: grain-size analysis

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: sediment
Theme_Keyword: Global Positioning System (GPS) observations

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

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Columbia River
Place_Keyword: State of Washington
Place_Keyword: State of Oregon

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 originator(s) of the dataset and in products derived from these data.

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: dgs_data_overview.png
Browse_Graphic_File_Description:

Maps showing locations of seafloor images colored by median sediment diameter (d50)

Browse_Graphic_File_Type: PNG

Native_Data_Set_Environment: MATLAB Version: 9.13.0.2080170 (R2022b) Update 1
Cross_Reference:

Citation_Information:

Originator: Daniel Buscombe
Publication_Date: 2013
Title:

Transferable wavelet method for grain-size distribution from images of sediment surfaces and thin sections, and other natural granular patterns

Other_Citation_Details:

Buscombe, D., 2013, Transferable wavelet method for grain-size distribution from images of sediment surfaces and thin sections, and other natural granular patterns, Sedimentology, v. 160, pp. 1709-1732.

Online_Linkage: https://doi.org/10.1111/sed.12049

Cross_Reference:

Citation_Information:

Originator: David M. Rubin
Publication_Date: 2004
Title:

A simple autocorrelation algorithm for determining grain size from digital images of sediment

Other_Citation_Details:

Rubin, D.M., 2004, A simple autocorrelation algorithm for determining grain size from digital images of sediment, Journal of Sedimentary Research, v. 74, pp. 160-165.

Online_Linkage: https://doi.org/10.1306/052203740160

Cross_Reference:

Citation_Information:

Originator: Jonathan A. Warrick
Originator: David M. Rubin
Originator: Peter Ruggiero
Originator: Jodi N. Harney
Originator: Amy E. Draut
Originator: Daniel Buscombe
Publication_Date: 2009
Title:

Cobble cam: grain-size measurements of sand to boulder from digital photographs and autocorrelation analyses

Other_Citation_Details:

Warrick, J.A., Rubin, D.M., Ruggier, P., Harney, J.N., Draut, A.E., and Buscombe, D., 2009, Cobble cam: grain-size measurements of sand to boulder from digital photographs and autocorrelation analyses, Earth Surface Processes and Landforms, v. 34, pp. 1811-1821.

Online_Linkage: https://doi.org/10.1002/esp.1877

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The grain size distributions estimated from automated image processing techniques (Buscombe, 2013, Rubin, 2004) were tested for a set of 16 images with observed grain size distributions. The observed grain size distribution data was generated for each image by manually measuring the long and short axis of 100 grains in the images following methods described in Warrick and others (2009). Grain size statistics were calculated based on the average distribution of long and short axis grain size measurements. Root-mean-square error between estimated and measured quantiles of the cumulative size distributions (using a percent finer convention; d16, d25, d50, d75, d84, and d90) varied between 5 and 12 mm or between 6 and 23 percent when normalized by the mean measured quantile. Agreement between estimated and measured cumulative size distribution was poorest for the smallest size fractions, with estimated quantiles biased too low. Good agreement was achieved for the median estimated grain size (d50), with a total root-mean-square error of 0.04 mm (6 percent) for images with median measured diameters between 0.29 and 1.07 mm.

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 locations of each seafloor image collected were determined using an Applanix POSMV Wavemaster operating in DGNSS mode. Manufacturer reported accuracy of the horizontal positions while operating in DGNSS mode is between 0.5 and 2 m depending on the quality of the DGNSS corrections received (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-WaveMaster-II.pdf). Additional uncertainty in the horizontal positions of the images due to instrument layback, or non-vertical wire angle between surface vessel and camera at the seafloor, is unknown but assumed to be minimal because of the weight of the camera and slow speed of the vessel relative to the ambient currents during image acquisition.

Lineage:

Process_Step:

Process_Description:

High resolution spatial surveys were performed between June 5 and 8, 2021 to quantify surface sediment grain size distributions of mobile subaqueous dunes at four sites in the lower Columbia River, Washington and Oregon. At each site, digital images of the sediment surface were collected with an underwater camera system that was repeatedly lowered to the seabed along a series of 1 km-long transects oriented along the main navigation channel and spaced about 60 m apart. The camera consisted of a FLIR Blackfly BFS-PGE-50S5 camera and 50 mm lens in a waterproof housing that resulted in a field of view of approximately 17 mm and a resolution of 0.00657 mm per pixel when the housing window was flush with the sediment surface. An ethernet cable between the survey vessel and camera provided power to the camera and allowed for real-time viewing of the seafloor imagery on a computer during acquisition. The locations of each seafloor image collected were determined using an Applanix POSMV Wavemaster global navigation satellite system receiver operating in DGNSS mode.

Process_Date: 20210608

Process_Step:

Process_Description:

Imagery were inspected to remove images that were not suitable for analysis, including blurry images and replicate images. Clear images of the seabed were subjectively classified into three groups including those that were suitable for automated grain size analysis, those that were too coarse (too few grains in the image), and those that were too fine (individual grains not visible) for analysis. The images that were too coarse or too fine for detailed quantitative analysis were retained for the qualitative information contained.

Process_Date: 20221213

Process_Step:

Process_Description:

The sediment grain size distributions of each image that were classified as suitable for image analysis were estimated using a combination of established automated image processing techniques (Buscombe, 2013, Rubin, 2004). Initial tests of the wavelet-based technique described in Buscombe (2013) suggested that the user-specified maximum scale, or maximum grain size that is considered in the analysis, was dependent on the size of grains in the images. An automated technique to specify an appropriate maximum scale for input in the wavelet analysis was established in the following manner. First, the grain size distributions of 15 calibration images were established by manually measuring the long and short axis of 100 grains in the images following methods described in Warrick and others (2009). Second, the wavelet analysis was applied using a range of maximum scale values for each calibration image and the optimal maximum scales were defined based on the RMS error between the measured and estimated quantiles describing the grain size distributions. Third, the autocorrelation coefficients of each image were computed according to Rubin (2004). The optimal maximum scale established for each calibration image was related to the lag distance corresponding to an autocorrelation coefficient of 0.65 using an exponential fit. Finally, the maximum scales of objective images were specified for the wavelet analysis based on the exponential curve.

Process_Date: 20230420

Process_Step:

Process_Description:

The grain size distributions estimated from automated image processing techniques (Buscombe, 2013, Rubin, 2004) were tested for a set of 16 validation images (separate from the calibration images used to establish the autocorrelation-maximum scale relationship) with observed grain size distributions. The observed grain size distribution data was generated for each image by manually measuring the long and short axis of 100 grains in the images following methods described in Warrick and others (2009). Grain size statistics were calculated based on the average distribution of long and short axis grain size measurements. Root-mean-square error between estimated and measured quantiles of the cumulative size distributions (using a percent finer convention; d16, d25, d50, d75, d84, and d90) varied between 5 and 12 mm or between 6 and 23 percent when normalized by the mean measured quantile. Agreement between estimated and measured cumulative size distribution was poorest for the smallest size fractions, with estimated quantiles biased too low. Good agreement was achieved for the median estimated grain size (d50), with a total root-mean-square error of 0.04 mm (6 percent) for images with median measured diameters between 0.29 and 1.07 mm.

Process_Date: 20230422

Process_Step:

Process_Description:

The grain size distributions of all suitable images collected in the lower Columbia River were computed using automated image processing techniques (Buscombe, 2013, Rubin, 2004). The results of the image analysis for the calibration and validation images and each site sampled were compiled into a comma-separated text files for distribution.

Process_Date: 20230503

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 1402

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Attribute Table
Entity_Type_Definition:

Table containing attribute information associated with the dataset

Entity_Type_Definition_Source: Producer defined

Attribute:

Attribute_Label: image_group
Attribute_Definition: Classification of group of images
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Calibration
Enumerated_Domain_Value_Definition: Images used for image processing technique calibration
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Validation
Enumerated_Domain_Value_Definition: Image used for image processing technique validation
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: ldb
Enumerated_Domain_Value_Definition: Image collected from Lower Dobelbower (ldb) site
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: skm
Enumerated_Domain_Value_Definition: Image collected from Skamokawa(skm) site
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: slg
Enumerated_Domain_Value_Definition: Image collected from Slaughters Bar (slg) site
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: wlw
Enumerated_Domain_Value_Definition: Image collected from Willow Bar (wlw) site
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: image_filename
Attribute_Definition: Filename of image collected
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Unrepresentable_Domain: Unique identifier for the image assigned in the field.

Attribute:

Attribute_Label: analysis_flag
Attribute_Definition:

Flag to indicate if image was analyzed to estimate grain size distribution or was too coarse or too fine for analysis

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: dgs
Enumerated_Domain_Value_Definition: Image was analyzed to estimate grain size distribution
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: coarse
Enumerated_Domain_Value_Definition:

Grains in image are too coarse for analysis of grain size distribution

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: fine
Enumerated_Domain_Value_Definition:

Grains in image are too fine for analysis of grain size distribution

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: datetime_utc
Attribute_Definition:

Date and time of image collection in yyyy-mm-dd HH:MM:SS.FFF format

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2021-06-05 16:31:45.780
Range_Domain_Maximum: 2021-06-08 19:12:46.990
Attribute_Units_of_Measure: Dates in yyyy-mm-dd HH:MM:SS.FFF format

Attribute:

Attribute_Label: longitude
Attribute_Definition:

Longitude of image in decimal degrees, east. NaN=not a number, because no location of the sample is available.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -123.442574
Range_Domain_Maximum: -122.762951
Attribute_Units_of_Measure: decimal degrees

Attribute:

Attribute_Label: latitude
Attribute_Definition:

Latitude of image in decimal degrees, north. NaN=not a number, because no location of the sample is available.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 45.712673
Range_Domain_Maximum: 46.250242
Attribute_Units_of_Measure: decimal degrees

Attribute:

Attribute_Label: pixel_size_mm
Attribute_Definition: Size of pixels in image in millimeters
Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00657
Range_Domain_Maximum: 0.00657
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: max_scale
Attribute_Definition:

Maximum scale input value used in wavelet analysis (Buscombe, 2013) of grain size distribution. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2.957
Range_Domain_Maximum: 20.902
Attribute_Units_of_Measure: unitless

Attribute:

Attribute_Label: x_fac
Attribute_Definition:

Area-by-number to volume-by-number conversion used in wavelet analysis (Buscombe, 2013) of grain size distribution. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.5
Range_Domain_Maximum: 1.5
Attribute_Units_of_Measure: unitless

Attribute:

Attribute_Label: 0.0078_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0078 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0093_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0093 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0111_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0111 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0131_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0131 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0156_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0156 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0186_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0186 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0221_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0221 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0263_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0263 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0312_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0312 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0372_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0372 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0442_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0442 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0526_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0526 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0625_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0625 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0743_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0743 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.0884_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.0884 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.1051_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.1051 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.1250_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.1250 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.1487_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.1487 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.1768_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.1768 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.2102_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.2102 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.2500_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.2500 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.2973_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.2973 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.3536_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.3536 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.4204_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.4204 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.5000_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.5000 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.5946_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.5946 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.7071_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.7071 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 0.8409_mm
Attribute_Definition:

Fraction of sample with grain diameter in 0.8409 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 1.0000_mm
Attribute_Definition:

Fraction of sample with grain diameter in 1.0000 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 1.1890_mm
Attribute_Definition:

Fraction of sample with grain diameter in 1.1890 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 1.4140_mm
Attribute_Definition:

Fraction of sample with grain diameter in 1.4140 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 1.6820_mm
Attribute_Definition:

Fraction of sample with grain diameter in 1.6820 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 2.0000_mm
Attribute_Definition:

Fraction of sample with grain diameter in 2.0000 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 2.3780_mm
Attribute_Definition:

Fraction of sample with grain diameter in 2.3780 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 2.8280_mm
Attribute_Definition:

Fraction of sample with grain diameter in 2.8280 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 3.3640_mm
Attribute_Definition:

Fraction of sample with grain diameter in 3.3640 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 4.0000_mm
Attribute_Definition:

Fraction of sample with grain diameter in 4.0000 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 4.7570_mm
Attribute_Definition:

Fraction of sample with grain diameter in 4.7570 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: 5.6570_mm
Attribute_Definition:

fraction of sample with grain diameter in 5.6570 mm bin. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 1.00
Attribute_Units_of_Measure: fraction

Attribute:

Attribute_Label: gs_mean
Attribute_Definition:

Arithmetic measure of mean grain size. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.211
Range_Domain_Maximum: 1.663
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: gs_sorting
Attribute_Definition:

Arithmetic measure of grain size sorting. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.092
Range_Domain_Maximum: 0.732
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: gs_skewness
Attribute_Definition:

Arithmetic measure of grain size skewness. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.145
Range_Domain_Maximum: 0.537
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: gs_kurtosis
Attribute_Definition:

Arithmetic measure of grain size kurtosis. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.721
Range_Domain_Maximum: 2.362
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d5_mm
Attribute_Definition:

Grain diameter whereby 5 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.068
Range_Domain_Maximum: 0.501
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d10_mm
Attribute_Definition:

Grain diameter whereby 10 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.091
Range_Domain_Maximum: 0.675
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d16_mm
Attribute_Definition:

Grain diameter whereby 16 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.111
Range_Domain_Maximum: 0.842
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d25_mm
Attribute_Definition:

Grain diameter whereby 25 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.136
Range_Domain_Maximum: 1.046
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d30_mm
Attribute_Definition:

Grain diameter whereby 30 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.149
Range_Domain_Maximum: 1.156
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d50_mm
Attribute_Definition:

Grain diameter whereby 50 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.197
Range_Domain_Maximum: 1.669
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d75_mm
Attribute_Definition:

Grain diameter whereby 75 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.281
Range_Domain_Maximum: 2.328
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d84_mm
Attribute_Definition:

Grain diameter whereby 84 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.320
Range_Domain_Maximum: 2.513
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d90_mm
Attribute_Definition:

Grain diameter whereby 90 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.347
Range_Domain_Maximum: 2.631
Attribute_Units_of_Measure: millimeters

Attribute:

Attribute_Label: d95_mm
Attribute_Definition:

Grain diameter whereby 95 percent of the cumulative percent of grains are finer than. NaN=not a number, because image was not analyzed for grain size distribution.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.382
Range_Domain_Maximum: 2.730
Attribute_Units_of_Measure: millimeters

Overview_Description:

Entity_and_Attribute_Overview: The first line of the csv file is a header line.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - CMGDS

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 1-831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Resource_Description:

These data are available in csv format accompanied by 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: comma-delimited text
Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b)
Format_Information_Content:

csv table containing grain size distributions of images collected for calibration and validation of the image processing technique.

File_Decompression_Technique: No compression applied
Transfer_Size: 0.013

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P92U1KPY

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Sediment Properties Data section.

Digital_Form:

Digital_Transfer_Information:

Format_Name: comma-delimited text
Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b)
Format_Information_Content:

csv table containing grain size distributions of images collected from the Lower Dobelbower (ldb) site.

File_Decompression_Technique: No compression applied
Transfer_Size: 0.126

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P92U1KPY

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Sediment Properties Data section.

Digital_Form:

Digital_Transfer_Information:

Format_Name: comma-delimited text
Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b)
Format_Information_Content:

csv table containing grain size distributions of images collected from the Skamokawa (skm) site.

File_Decompression_Technique: No compression applied
Transfer_Size: 0.131

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P92U1KPY

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Sediment Properties Data section.

Digital_Form:

Digital_Transfer_Information:

Format_Name: comma-delimited text
Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b)
Format_Information_Content:

csv table containing grain size distributions of images collected from the Slaughters Bar (slg) site.

File_Decompression_Technique: No compression applied
Transfer_Size: 0.093

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P92U1KPY

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Sediment Properties Data section.

Digital_Form:

Digital_Transfer_Information:

Format_Name: comma-delimited text
Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b)
Format_Information_Content:

csv table containing grain size distributions of images collected from the Willow Bar (wlw) site.

File_Decompression_Technique: No compression applied
Transfer_Size: 0.157

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P92U1KPY

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Sediment Properties Data section.

Fees: None.

Metadata_Reference_Information:

Metadata_Date: 20230808
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

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P92U1KPY/dgs_metadata.html>