4-meter resolution bathymetric grid representing single beam data collected by the U.S. Geological Survey during field activity 2016-030-FA offshore Sandwich Beach, MA in June 2016 (32-bit GeoTIFF, UTM Zone 19N, NAD83-HARN)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2018
Title:
4-meter resolution bathymetric grid representing single beam data collected by the U.S. Geological Survey during field activity 2016-030-FA offshore Sandwich Beach, MA in June 2016 (32-bit GeoTIFF, UTM Zone 19N, NAD83-HARN)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9TJIM2M
Publication_Information:
Publication_Place:
Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: https://doi.org/10.5066/P9TJIM2M
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Danforth, W.W.
Originator: Sherwood, C.R.
Originator: Martini, M.A.
Originator: Borden, J.
Originator: Brosnahan, S.M.
Publication_Date: 2018
Title:
Sidescan sonar, single beam bathymetry, and navigation collected offshore of Sandwich Beach in 2016, U.S. Geological Field Activity 2016-030-FA
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9TJIM2M
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Danforth, W.W. Sherwood, C.R., Martini, M.A., Borden, J., and Brosnahan, S.M., 2018, Sidescan sonar, single beam bathymetry, and navigation collected offshore of Sandwich Beach in 2016, U.S. Geological Field Activity 2016-030-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9TJIM2M.
Online_Linkage: https://doi.org/10.5066/P9TJIM2M
Description:
Abstract:
The objectives of the survey were to provide bathymetric and sidescan sonar data for sediment transport studies and coastal change model development for ongoing studies of nearshore coastal dynamics along Sandwich Town Neck Beach, MA. Data collection equipment used for this investigation are mounted on an unmanned surface vehicle (USV) uniquely adapted from a commercially sold gas-powered kayak and termed the "jetyak". The jetyak design is the result of a collaborative effort between USGS and Woods Hole Oceanographic Institution (WHOI) scientists.
Purpose:
This bathymetric grid represents approximately 26 kilometers of single beam echo-sounder bathymetry data collected in 2016. These data were collected by the Woods Hole Coastal and Marine Science Center during USGS field activity 2016-030-FA using a Humminbird 898c HD SI Combo GPS/Fish Finder remote sensing instrument (www.humminbird.com) that is rigidly mounted on the hull of the jetyak. These data can be used in conjunction with other geophysical and sample data to identify sea-floor morphology and sediment texture.
Supplemental_Information:
For more information about the WHCMSC Field Activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-030-FA.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20160606
Ending_Date: 20160608
Currentness_Reference: ground condition during 2016606 - 20160608
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.487569
East_Bounding_Coordinate: -70.470986
North_Bounding_Coordinate: 41.774025
South_Bounding_Coordinate: 41.761610
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: USGS
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: CMGP
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: WHCMSC
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: Marine Geology
Theme_Keyword: field activity number 2016-030-FA
Theme_Keyword: WAAS navigation
Theme_Keyword: RTK navigation
Theme_Keyword: post-processed kinematic
Theme_Keyword: Humminbird 898c HD SI Combo
Theme_Keyword: R/V Knob
Theme_Keyword: Jetyak
Theme:
Theme_Keyword_Thesaurus: USGS thesaurus
Theme_Keyword: remote sensing
Theme_Keyword: field methods
Theme_Keyword: field inventory and monitoring
Theme_Keyword: sonar methods
Theme_Keyword: single-beam echo sounder
Theme_Keyword: datasets
Theme_Keyword: geospatial datasets
Theme_Keyword: geolocation measurement
Theme_Keyword: bathymetry measurement
Theme_Keyword: digital elevation models
Theme_Keyword: bathymetry
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: elevation
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Massachusetts
Place_Keyword: Sandwich Beach
Place_Keyword: Sandwich
Access_Constraints: none
Use_Constraints:
Not to be used for navigation. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William W. Danforth
Contact_Organization: U. S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2274
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
Depth-colored image of bathymetry data collected offshore of Sandwich Beach, MA
Browse_Graphic_File_Type: JPEG
Data_Quality_Information:
Logical_Consistency_Report:
This file represents single beam echo-sounder bathymetry data collected by the Woods Hole Coastal and Marine Science Center during USGS field activity 2016-030-FA using a Humminbird 898c HD SI Combo GPS/Fish Finder remote sensing instrument mounted on the USGS Jetyak. These data were combined with post-processed orthometric heights collected using two Spectra Precision SP80 GNSS receivers, one of which was mounted on the USGS Jetyak and the other set up on the beach as a base station.
Completeness_Report:
All collected survey line data were edited for erroneous soundings and incorporated into the final bathymetric grid.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Navigation were acquired using a Hummingbird 898c HD SI Combo Global Positioning System (GPS), using the Wide Area Augmentation System (WAAS), which is spatially accurate within 2 meters, horizontally.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Humminbird 898c HD SI Combo GPS/Fish Finder also collects depth values below the instrument transducer. Vertical accuracy of the raw data in water depths of 10 meters or less, based on industry standard system specifications for 83 and 200 kHz transmit frequencies, is 5-10 centimeters
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: Unpublished Material
Title: Raw bathymetric data in Humminbird .son/.dat format.
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20160606
Ending_Date: 20160608
Source_Currentness_Reference: ground condition during 20160606 - 20160608
Source_Citation_Abbreviation: Raw Bathymetric Data
Source_Contribution:
These data were collected using the USGS jetyak, a commercially sold gas-powered kayak built in upstate New York, running pre-planned lines perpendicular to the beach with a 20 meter line spacing. The jetyak has a roto-molded polyethylene hull and an air-cooled 7-horsepower four-stroke engine. It is propelled and steered by means of a water-drive. The boat will run for 8 to 10 hours on 3 gallons of gas at survey speeds of 2 to 6 knots. Modifications were made by USGS and WHOI scientists to make the jetyak autonomous. The two original manual controls (throttle and steering) are replaced by servos: automatic devices that use error-sensing feedback to correct performance, such as those employed in remote-control airplanes and satellite-tracking antennas. The servos are run by an onboard computer developed for aerial drones. This computer, a modified Arduino, includes Ardupilot software and a special circuit board that provides interfaces for the controls, radio, and Global Positioning System receiver (GPS). The only other modification is installation of a centrifugal clutch, which allows the engine to idle without moving the jetyak.
Onboard the Jetyak is a hull mounted Humminbird 898c HD SI Combo GPS Fish Finder that is used for GPS navigation and location in addition to collection of sidescan sonar data at 455 kHz, and depth (bathymetric) data at 83 and 200 kHz. Files are saved in a proprietary Humminbird .SON/.DAT paired data format, contact www.humminbird.com for details. A separate navigation GPS receiver mounted onboard the Jetyak is a Spectra Precision SP80 GNSS receiver (http://www.spectraprecision.com/eng/sp80.html#.WyQWYDNKjUI). This receiver is mounted on top of a pole 1.025 meters in length which is attached to the hull of the jetyak. This receiver is called the "rover", and saves information that will later be used in conjunction with base station established on the beach to calculate kinematic solutions for both the horizontal and vertical coordinates of the rover. The sidescan sonar, navigation, and bathymetry data were processed using Chesapeake Technology 64-bit SonarWiz6 version 6.05.0025 (www.chesapeaketech.com) and ArcGIS version 10.5 (www.esri.com).
Process_Step:
Process_Description:
Extract trackline bathymetry values using SonarWiz6 from the raw data:
1. Create a project (UTM-WGS84, Zone 19N, central meridian -69.0) and use all default import parameters for the Humminbird .DAT format in SonarWiz6 (use sensor heading, import 1024 samples per channel, use channels 1 and 2).
2. Once the .DAT file is imported, select the Tools menu in SonarWiz6, and select CSF, convert CSF file to CSV. This will save all information from the sonar file to a scratch comma-separated values (CSV) text file.
3. Using Excel (or other tabular data software), extract the date, time, altitude (depth below transducer), navigation (easting, northing of nadir line) from the CSV file created in step 2 and save these values to a new temporary scratch CSV file.
4. The DGPS horizontal coordinates recorded by the Humminbird unit are based on the WGS84 ellipsoid (WGS84 G1762, ITRF2008). Using vdatum ( https://vdatum.noaa.gov/ ), transform the horizontal UTM Zone 19 WGS84 coordinates using the file created in step 4 to the NAD83 HARN UTM Zone 19 reference frame, and save these coordinates to a new file containing date, time, transformed trackline coordinates (easting, northing), and depth below transducer (2016-030-FA_navigation.csv).
5. Using the UNIX utility gawk (Mac OS X ver 10.13.4, GNU gawk v4.2.1) to extract every 25th navigation entry from the CSV file created in step 5 (corresponding to every 1 sec) to a CSV file for efficient grid processing (2016-030-FA_navigation_dec25.csv).
Command line: gawk 'BEGIN{count=0}{if(!(count % 25))print;count++}' 2016-030-FA_navigation.csv > 2016-030-FA_navigation_dec25.csv
Process_Date: 20180521
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William W. Danforth
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2274
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Process_Step:
Process_Description:
Bathymetric grid creation and processing using ArcGIS 10.5:
1. Using the CSV file 2016-030-FA_navigation_dec25.csv, right click and create a feature class (shapefile) from XY table in ArcCatalog (NAD83 UTM HARN Zone 19N, X field is nadir easting, Y field is nadir northing, depth field is Depth) that represents each single beam sounding from the Humminbird instrument.
2. Erroneous depth values in the shapefile were deleted using the editor feature of ArcMap 10.5.
3. The edited feature class from step 1 was interpolated into a grid using the ArcCatalog version 10.5 Spatial Analyst Interpolation Kriging tool. The kriging method parameters are Method: Ordinary, Semivariogram Model: Spherical, Output cell size: 3 meters, Search Radius: Fixed, search radius 20 meters.
4. The depth values for the bathymetric grid created in step 3 were converted from positive values to negative values using the Raster Calculator in ArcGIS ArcCatalog 10.5. The input raster was multiplied by a value of -1 and a new output raster was generated with negative depth values.
Process_Date: 20180521
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William W. Danforth
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2274
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Process_Step:
Process_Description:
Bathymetric grid elevation adjustment referenced to NAVD88:
1. Using the CSV file created from the navigation containing post-processed kinematic orthometric heights, right click on the CSV file and create a feature class (shapefile) from XY table in ArcCatalog (Geographic - NAD83 HARN GRS80; X field is LonDeg, Y field is LatDeg, height field is ortho_ht_m) that represent 30 second calculated orthometric heights.
2. Using the shapefile created in step 1 containing post-processed orthometric heights, create an interpolated grid of the orthometric heights using the ArcCatalog version 10.5 Spatial Analyst Interpolation Spline with barriers tool. The spline with barriers method parameters are Method: input point features: ortho_ht_m, output cell size: 0.00004263332, input barrier feature: Jetyak_2016_bounds, smoothing factor 0.5.
3. Using the bathymetric grid created in the previous process step, use the Spatial Analyst Math Plus tool in ArcGIS ArcCatalog 10.5 to add the orthmetric height grid created in step 2 to the bathymetric grid to generate a new raster grid that represents the bathymetric soundings referenced to NAVD88.
Process_Date: 20180521
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William W. Danforth
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2274
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 331
Column_Count: 331
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 19N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -69.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 4
Ordinate_Resolution: 4
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_North_American_1983_HARN
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: NAVD88
Altitude_Resolution: .01
Altitude_Distance_Units: meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
There are no text attributes associated with a binary GeoTIFF image. Single beam bathymetric grid values in 32-bit floating point GeoTIFF format. Data values represent elevation in meters relative to North American Vertical Datum of 1988 (NAVD88).
Entity_and_Attribute_Detail_Citation:
U.S. Geological Survey for the meaning of pixel values. For further details regarding the GeoTIFF file structure and headers, see: https://www.loc.gov/preservation/digital/formats/fdd/fdd000279.shtml#specs
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William W. Danforth
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2274
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Resource_Description:
Windows 10 zip file 2016-030-FA_bathymetry_4m.zip containing a 32-bit floating point GeoTIFF grid of bathymetric data (2016-030-FA_bathymetry_4m.tif), FGDC CSDGM metadata files (2016-030-FA_bathymetry_4m.xml, 2016-030-FA_bathymetry_4m.html, 2016-030-FA_bathymetry_4m.txt), and the browse graphic 2016-030-FA_bathymetry_browse.jpg.
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
Format_Version_Date: 06202018
Format_Specification: 32-bit floating point GeoTIFF format
Format_Information_Content:
Windows 10 zip file containing 32-bit floating point GeoTIFF representing a grid of single beam bathymetric data collected by the U.S. Geological Survey during field activity 2016-030-FA offshore Sandwich Beach, MA in June 2016. The zip file also includes associated metadata.
File_Decompression_Technique:
To extract the data, use Windows Explorer (Windows 7, 8, 10), WinZip, 7zip, Peazip or pkUnzip
Transfer_Size: 0.195
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link downloads the data in a zip file, the second link is to the landing page of the data, and the third link is the DOI link to the landing page of the data.
Fees: none
Technical_Prerequisites:
These data are available as a 32-bit floating point GeoTIFF image. The GeoTIFF and associated world file are stored in one folder 'bathymetry' that has been compressed using native Windows 10 compression software. To utilize these data, the user must have an image viewer, image processing, or GIS software package capable of importing a GeoTIFF image. Free spatial data viewers, ArcGIS Earth and Google Earth Pro, are capable of displaying the data. See: http://www.esri.com/software/arcgis-earth, or https://www.google.com/earth/desktop/. The zip file also contains associated metadata.
Metadata_Reference_Information:
Metadata_Date: 20180802
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William W. Danforth
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: Massachusetts
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2274
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

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