FI_BATHYGRD: 10-meter swath bathymetric grid collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (UTM Zone 18N, WGS 84, Esri Binary Grid)

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: U.S. Geological Survey

Publication_Date: 2014

Title:

FI_BATHYGRD: 10-meter swath bathymetric grid collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (UTM Zone 18N, WGS 84, Esri Binary Grid)

Edition: 1.0

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2014-1203

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://pubs.usgs.gov/of/2014/1203/GIS/grids/fi_bathy.zip>

Online_Linkage:

<https://pubs.usgs.gov/of/2014/1203/html/ofr2014-1203-data_catalog.html>

Larger_Work_Citation:

Citation_Information:

Originator: William C. Schwab

Originator: Jane F. Denny

Originator: Wayne E. Baldwin

Publication_Date: 2014

Title:

Maps Showing Bathymetry and Modern Sediment Thickness on the Inner- Continental Shelf Offshore of Fire Island, New York: pre-Hurricane Sandy

Edition: 1.0

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2014-1203

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2014/1203/>

Online_Linkage: <https://dx.doi.org/2014/1203>

Description:

Abstract:

The U.S. Geological Survey (USGS) mapped approximately 336 square kilometers of the lower shoreface and inner-continental shelf offshore of Fire Island, New York in 2011 using interferometric sonar and high-resolution chirp seismic-reflection systems. This report presents maps of bathymetry, acoustic backscatter, the coastal plain unconformity, the Holocene marine transgressive surface and modern sediment thickness. These spatial data support research on the Quaternary evolution of the Fire Island coastal system and provide baseline information for research on coastal processes along southern Long Island.

More information about this field activity and the data collected can be found at the Field Activity Web Page (<http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2011-005-FA>)

Purpose:

This grid represents approximately 2800 line kilometers of bathymetric data collected in 2011. These data were collected using an interferometric sonar (Systems Engineering and Assessment Ltd. (SEA) SWATHplus-M (234 kHz)) by the U.S. Geological Survey during USGS survey 2011-005-FA. These bathymetric data were used to define the morphology of the sea floor on the inner-continental shelf offshore of Fire Island, New York to help assess environmental change caused by natural processes and human activities.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20110520

Ending_Date: 20110608

Currentness_Reference:

ground condition during 20110520 - 20110523, 20110525 - 20110601; 20110604 - 20110608.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -73.280193

East_Bounding_Coordinate: -72.738989

North_Bounding_Coordinate: 40.758503

South_Bounding_Coordinate: 40.536355

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

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 2011-005-FA

Theme_Keyword: bathymetry

Theme_Keyword: swath bathymetry

Theme_Keyword: interferometry

Theme_Keyword: SEA SWATHplus-M (234 kHz)

Theme_Keyword: M/V Scarlett Isabella

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: oceans

Theme_Keyword: elevation

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: North America

Place_Keyword: United States

Place_Keyword: New York

Place_Keyword: Fire Island

Place_Keyword: Fire Island National Seashore

Access_Constraints: none

Use_Constraints:

These data are NOT to be used for navigation. Mariners should refer to the appropriate nautical chart. 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: Jane F. Denny

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 x 2311

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<https://pubs.usgs.gov/of/2014/1203/GIS/grids/bathy/fi_bathygrd_sm.jpg>

Browse_Graphic_File_Description:

Depth-colored image of bathymetry on the inner-continental shelf offshore of Fire Island, NY

Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment:

Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.1850

Cross_Reference:

Citation_Information:

Originator: William C. Schwab

Originator: Wayne E. Baldwin

Originator: Cheryl J. Hapke

Originator: Erika E. Lentz

Originator: Paul T. Gayes

Originator: Jane F. Denny

Originator: Jeffrey H. List

Originator: John C. Warner

Publication_Date: 2013

Title:

Geologic Evidence for Onshore Sediment Transport from the Inner Continental Shelf: Fire Island, New York

Edition: 1.0

Geospatial_Data_Presentation_Form: document

Series_Information:

Series_Name: Journal of Coastal Research

Issue_Identification: Volume 29, Issue 3, pp. 526-544.

Publication_Information:

Publication_Place: Florida, USA

Publisher: Coastal Education and Research Foundation, Inc.

Online_Linkage: <https://dx.doi.org/10.2112/JCOASTRES-D-12-00160.1>

Cross_Reference:

Citation_Information:

Originator: David S. Foster

Originator: Ann B. Swift

Originator: William C. Schwab

Publication_Date: 1999

Title:

Stratigraphic Framework Maps of the nearshore area of southern Long Island from Fire Island to Montauk Point, NY

Edition: 1.0

Geospatial_Data_Presentation_Form: document

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 99-559

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: <https://pubs.usgs.gov/of/1999/of99-559/>

Cross_Reference:

Citation_Information:

Originator: William C. Schwab

Originator: E. Robert Thieler

Originator: Jane F. Denny

Originator: William W. Danforth

Originator: Jenna C. Hill

Publication_Date: 2000

Title:

Seafloor sediment distribution off southern Long Island, New York

Edition: 1.0

Geospatial_Data_Presentation_Form: document

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 00-243

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: <https://pubs.usgs.gov/of/2000/of00-243/>

Data_Quality_Information:

Logical_Consistency_Report:

This grid represents interpolated data; processed to account for gaps that occurred along-track and between adjacent lines.

Completeness_Report:

Line 1 - 51, 61 - 64, 68 - 87, and 93 - 109 were used to generate the bathymetric grid. Lines 52-60, 65 - 67, and 89 - 92 are tie lines collected orthogonal to the shoreline. Tie lines were used to QA/QC the bathymetric data during data processing, but were not incorporated into the final bathymetric grid.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Navigation was acquired with Differential Global Positioning System and Wide Area Augmentation System (DGPS+WAAS), which is accurate to + or - 1 to 2 meters, horizontally. The forward, or primary, Coda Octopus F180R Attitude and Positioning system antenna was used to acquire DGPS data and transmit via a network connection to the SEA SWATHplus data acquisition software. The F180R Attitude and Positioning system uses 2 L1 antennas for position and heading and an Inertial Measurement Unit (IMU) for motion sensing (heave, pitch, roll and yaw). The F180R IMU is mounted directly above the SEA SWATHplus-M transducers on the sidemount. The F180R antennas are mounted at the top of the sidemount offset in a forward/aft configuration. The offsets were applied within the SWATHplus and Coda Octopus F180R acquisition software.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Vertical accuracy of the raw data based on system specifications may approximate 1% of water depth, approximately 0.1 to 0.3 meters within the survey area. However, overall vertical accuracies on the order of 50 cm are assumed based on the following considerations: The Coda Octopus F180R Attitude and Positioning system, used to correct for vessel roll, pitch, heave, and yaw, has a theoretical vertical accuracy of a few mm. Real Time Kinematic (RTK) GPS height corrections, broadcast from a continuously operated reference station (CORS) at Central Islip, New York (station NTCI), were used to reference soundings to the North American Vertical Datum of 1988 (NAVD88) and remove water depth variations caused by tides. USGS field tests (unpublished) using submerged targets suggest that the vertical accuracy of the RTK-GPS tidal correction is less than 30cm. Refraction artifacts were minimized by acquiring sound velocity profiles with an ODIM MVP30 moving vessel profiler. However, the ODIM MVP30 failed half-way through the survey. No sound velocity profiles were collected for the remainder of the survey (lines 48 - 109) and refraction corrections were applied during post-processing. Changes in ship draft due to water and fuel usage were not considered.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: Unpublished Material

Title: Raw Bathymetric Data

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20110520

Ending_Date: 20110608

Source_Currentness_Reference:

ground condition during 20110520 - 20110523; 20110525 - 20110601; 20110604 - 20110608

Source_Citation_Abbreviation: none

Source_Contribution:

Survey: Survey lines were run at an average speed of 5 knots. Lines 1 through 27 were run at a 75-m line spacing to achieve full coverage of the seafloor in a priority area of interest in the nearshore, in water depths less than 15 meters. Lines 28 through 109 were run at a 150-m line spacing, with the exception of tie lines (lines 52 through 60, 65 through 67, 89 through 92), which were run at approximately a 2-km line spacing.

Sonar: Swath-bathymetric and acoustic-backscatter data were acquired with a SEA, Ltd., SWATHplus-M interferometric sonar operating at a frequency of 234 kHz and a variable range (increased or decreased manually depending on water depth). The system was operated with a transmit power: 80 percent, 4096 samples per channel, and a variable range (increased or decreased depending on water depth). The SWATHplus-M was mounted on the port side of the M/V Scarlett Isabella during survey operations. A Coda Octopus F180R Attitude and Positioning system recorded ship motion (heave, pitch, roll, and yaw). These data were transmitted via network connection to the SWATHplus-M acquisition software. The Octopus F180R Inertial Measurement Unit (IMU) was mounted directly above the SEA SWATHplus-M transducers, to minimize lever arm offsets that can lead to positioning errors. The F180R uses two L1 antennas for position and heading accuracy. The antennas are mounted on a rigid horizontal pole, positioned at the top of the sidemount, with a horizontal separation of 1 meter and are offset from the IMU in a forward/aft configuration. The forward offset of the primary antenna from the IMU is 0.5 meters, with no port/starboard offset.

Sound Velocity Profiles: 135 sound velocity profiles were acquired during survey operations at roughly 1 to 3 hour intervals using an Odim MVP30 motion vessel profiler. The MVP30 failed during survey operations. Sound velocity profiles were only collected during JD141 through 143 (lines 1 through 27).

While much effort was devoted to cleaning the data and minimizing survey artifacts, some artifacts may still be seen in the final gridded data including an along track artifact at nadir (the ship track) and at the far edges of a survey line where adjacent swaths overlap. These artifacts are especially noticeable in areas of little local relief.

More information about this field activity and the data collected can be found at the Field Activity Web Page (<http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2011-005-FA>)

Process_Step:

Process_Description:

Converting Raw (SXR) to Field-Processed (SXP) Files: Raw SXR bathymetry data were acquired with the SEA SWATHplus acquisition software (version 3.07) and used to generate field-processed SEA SWATHplus SXP files. The following information was stored within the SWATHplus session files and applied to the raw bathymetric soundings: 135 sound velocity profiles to minimize refraction artifacts due to fluctuations from the speed of sound in the water column (lines 1 - 27 only; no corrections were applied to lines 28 - 109 due to MVP30 system failure), roll offsets calculated during pre-survey patch test, draft of the transducer below the water line, and the measured angles and relative positions of the swath bathymetric transducers. The SWATHplus acquisition software applies the pitch, roll, heave, yaw and heading data supplied by the F180R IMU, to compensate depth solutions across the swath for any ship motion. Several bathymetric filters were applied to remove erroneous soundings and reduce the density of the data. Bathymetric filtering typically included low amplitude (110%), range (0-3m), phase confidence (55%), box (2 -40m depth, 0.5 -75m horizontal), median (window size 5), water column (10%), alongtrack 1 (depth difference of 3-m, window size 3-m, and learn rate of 0.6), and mean filters (0.25m). These represent the typical parameters used for the majority of the USGS survey although the values may have been adjusted slightly for specific parts of the survey area.

Jane F. Denny performed this and all subsequent process steps.

Process_Date: 2014

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

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 x 2311

Contact_Facsimile_Telephone: 508-457-2311

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Process_Step:

Process_Description:

Navigation: Tide files were created during post-processing using one- or two-minute interval averages of the RTK tide data recorded in the "TID" message string of the HYPACK navigation file for each line. The TID messages from DEV 1 (which was the NovAtel DL-V3 receiver) were used to extract the tide offset values using a shell script called getNovatelTides and an AWK script called parseHypackNovatelTides.awk

Process_Date: 2014

Process_Step:

Process_Description:

Processing data within CARIS: A new CARIS HIPS project (version 7.1) was created with projection information set to Universal Transverse Mercator (UTM) Zone 18N, WGS84. Each SWATHPlus processed file (sxp) was imported to the new CARIS project using the Import/Conversion Wizard. A 5 meter resolution Bathymetric and Statistical Error (BASE) Surface was created and reviewed for any inconsistencies or data anomalies. Navigation was reviewed and edited as needed using the navigation editor tool. A 'tide' file, representing water elevations referenced to NAVD88, was loaded into CARIS and merged with each line to apply a correction for tidal variations throughout the survey. The BASE surface was recomputed to incorporate the new tide information. Beam-to-beam slopes and across track angle filters were applied to the soundings line by line and each line was further hand-edited using Swath Editor. The refraction editor was used to adjust sound speed values in areas where velocimeter data did not adequately correct for changes in the speed of sound through the water column (lines 1 - 27), or where no velocimeter data were collected (lines 28 - 109).

The final surface was exported in ASCII format (xyz - easting, northing, depth) using the Export Wizard, Export BASE Surface to ASCII.

Process_Date: 2014

Process_Step:

Process_Description:

ArcGIS: ArcGIS 9.3.1, Tools, Add XY data (WGS 1984, UTM, Zone 18N) was used to add the data as an event theme to the ArcGIS project file. The event theme was loaded into the view and then exported (Data - Export Data) as a shapefile. Spatial Analyst, Interpolation, Natural Neighbor was then used to generate a 10-m interpolated surface. Depths in the resulting grid were positive values. To convert these to negative depths, Raster Calculator was used (grid * -1) and the output saved. The output grid was then clipped using a bounding polygon representing the survey bounds (Spatial Analyst, Extraction, Extract by Mask), created the final bathymetric grid: fi_bathygrd.

Process_Date: 2014

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 2365

Column_Count: 4525

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: 18

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -75.000000

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: 10.000000

Ordinate_Resolution: 10.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257224

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: NAVD88

Depth_Resolution: 0.1 meters

Depth_Distance_Units: meters

Depth_Encoding_Method: Explicit depth 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

Entity_Type_Definition_Source: Esri

Overview_Description:

Entity_and_Attribute_Overview:

Swath bathymetry in Esri ArcRaster format. Data values represent depth in meters referenced to North American Vertical Datum of 1988 (NAVD88).

Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

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 x 2311

Contact_Facsimile_Telephone: 508-457-2311

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Resource_Description: Downloadable Data

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: AIG

Format_Version_Number: ArcGIS 9.3

Format_Specification: Esri Raster GRID format

Format_Information_Content:

WinZip (version 14.0) file containing the ArcRaster grid of swath bathymetric data collected by the USGS offshore of Fire Island, NY, 2011. This also includes associated metadata.

File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip

Transfer_Size: 10.38 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <https://pubs.usgs.gov/of/2014/1203/GIS/grids/fi_bathy.zip>

Network_Resource_Name:

<https://pubs.usgs.gov/of/2014/1203/html/ofr2014-1203-data_catalog.html>

Access_Instructions: Data can be downloaded via the Internet

Fees: none

Custom_Order_Process: none

Technical_Prerequisites:

These data are available as a ArcInfo 32-bit floating point binary grid in Esri format. The floating point binary grid and associated 'info' folder are stored in one folder 'bathy' that has been compressed using WinZip (ver.14.0) software. To utilize these data, the user must have software capable of uncompressing the zip file and importing and viewing an Esri ArcRaster grid. The zip file also contains associated metadata.

Metadata_Reference_Information:

Metadata_Date: 20141017

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane F. Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 394 Woods Hole Road

City: Woods Hole

State_or_Province: Massachusetts

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-548-8700 x 2311

Contact_Facsimile_Telephone: 508-457-2311

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com>

Profile_Name: ESRI Metadata Profile