Grid of the sea-floor bathymetry offshore of Fire Island Inlet, New York, in 1998 (3-m resolution Esri binary grid, Mercator, WGS 84)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2016
Title:
Grid of the sea-floor bathymetry offshore of Fire Island Inlet, New York, in 1998 (3-m resolution Esri binary grid, Mercator, WGS 84)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F7Z899GG
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: https://doi.org/10.5066/F7Z899GG
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Bradford Butman
Originator: William W. Danforth
Originator: John E. Hughes Clarke
Originator: Richard P. Signell
Originator: William C. Schwab
Publication_Date: 2016
Title:
Bathymetry and backscatter intensity of the sea floor south of Long Island, New York
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: 10.5066/F7Z899GG
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F7Z899GG
Online_Linkage:
Description:
Abstract:
Surveys of the bathymetry and backscatter intensity of the sea floor south of Long Island, New York, were carried out in November 1998 using a Simrad EM1000 multibeam echosounder mounted on the Canadian Coast Guard ship Frederick G. Creed. The purpose of the multibeam echosounder surveys was to explore the bathymetry and backscatter intensity of the sea floor in several areas off the southern coast of Long Island along the 20-meter isobath. Survey areas offshore of Fire Island Inlet, Moriches Inlet, Shinnecock Inlet, and southwest of Montauk Point were about 1 kilometer (km) wide and 10 km long. The area was mapped by the U.S. Geological Survey with support from the Canadian Hydrographic Service and the University of New Brunswick.
Purpose:
This data release makes multibeam echosounder data from the 1998 survey of the sea floor offshore of Fire Island Inlet, New York, available in digital form. The bathymetry shows the shape of the sea floor. Of particular interest were the size, shape, and orientation of bed forms that may indicate sediment movement.
Supplemental_Information:
Other data sets from this survey may be found in Butman and others (2016) (see larger work citation).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19981106
Ending_Date: 19981107
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.250000
East_Bounding_Coordinate: -73.079999
North_Bounding_Coordinate: 40.639992
South_Bounding_Coordinate: 40.570000
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:56ba3341e4b08d617f648ffd
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: bathymetry
Theme_Keyword: Esri binary grid
Theme_Keyword: multibeam
Theme_Keyword: 3-m grid
Theme_Keyword: sea floor mapping
Theme_Keyword: Simrad EM1000
Theme_Keyword: Canadian Coast Guard ship (CCGS) Frederick G. Creed
Theme_Keyword: WHCMSC field activity 1998-015-FA
Theme_Keyword: Woods Hole Coastal and Marine Science Center (WHCMSC)
Theme_Keyword: Coastal and Marine Geology Program (CMGP)
Theme_Keyword: U.S. Geological Survey (USGS)
Theme_Keyword: Canadian Hydrographic Service
Theme_Keyword: University of New Brunswick
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: elevation
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: sea-floor characteristics
Theme_Keyword: multibeam sonar
Theme_Keyword: marine geophysics
Theme_Keyword: geospatial datasets
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Fire Island
Place_Keyword: Long Island
Place_Keyword: New York Bight
Place_Keyword: Middle Atlantic Bight
Place_Keyword: mid-Atlantic Bight
Place_Keyword: New York
Place_Keyword: North Atlantic Ocean
Temporal:
Temporal_Keyword_Thesaurus: none
Temporal_Keyword: 1998
Access_Constraints: None
Use_Constraints: These data are not to be used for navigation purposes.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Bradford Butman
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2212
Contact_Electronic_Mail_Address: bbutman@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: fire_bath3m_browse.jpg
Browse_Graphic_File_Description:
Image of sea-floor bathymetry offshore of Fire Island Inlet, New York. File is located in the compressed zip file.
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
Cross_Reference:
Citation_Information:
Originator: Schwab, W.C.
Originator: Thieler, E.R.
Originator: Denny, J.F.
Originator: Danforth, W.W.
Publication_Date: 2000
Title:
Seafloor sediment distribution off southern Long Island, New York
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 00-243
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/2000/of00-243/
Data_Quality_Information:
Logical_Consistency_Report:
All data were processed in the same manner. Some features in the multibeam data are artifacts of data collection and environmental conditions. They include small highs and lows and unnatural-looking features, and patterns oriented parallel or perpendicular to survey tracklines. The orientation of the tracklines is sometimes identified by faint parallel stripes in the image. During data acquisition, the electrically erasable programmable read only memory (EEPROM) within the transceiver that controls the beam launch angles was programmed with incorrect parameters for the outer ten beams on the port and starboard sides. This caused depth soundings to be deeper for these outer beams by approximately 0.1 m; these deeper soundings are not corrected. The Long Island surveys were assigned a block of line numbers beginning with 3000.
Completeness_Report:
This image contains all data collected in the multibeam survey offshore of Fire Island Inlet, New York, in 1998. There are a few gaps in the grid due to incomplete coverage by the multibeam system. Other data sets collected offshore of Long Island, New York, on WHCMSC field activity 1998-015-FA may be found in Butman and others (2016) (see larger work citation).
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
These data were navigated with a Differential Global Positioning System (DGPS); they are accurate to +/- 3 meters, horizontally.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
These data have been corrected for vessel motion (roll, pitch, heave, yaw). The theoretical vertical resolution of the Simrad EM-1000 multibeam echosounder is 1% of water depth, approximately 0.2 m within the study area. The soundings were also corrected for tidal fluctuations using the ADCIRC tidal model. The model produces harmonic constituents and a mean component relative to the NAVD88 datum. Correcting survey water levels using ADCIRC-predicted water levels are thus relative to NAVD88 datum. Deviation from the NAVD88 datum will be due errors in the ADCIRC correction, other fluctuations in sea level during the survey, and deviation of mean sea level from NAVD88 due to ocean dynamics.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Canadian Hydrographic Service
Originator: William W. Danforth
Originator: John E. Hughes Clarke
Publication_Date: Unpublished Material
Title: raw multibeam data
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19981106
Ending_Date: 19981107
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: none
Source_Contribution:
The multibeam data were collected with a Simrad EM1000 multibeam echosounder mounted on the starboard pontoon of the Canadian Coast Guard ship Frederick G. Creed. The multibeam system utilizes 60 electronically-aimed receive beams spaced at intervals of 2.5 degrees that insonify a strip of sea floor up to 7.5 times the water depth. The horizontal resolution of the beam on the sea floor is approximately 10 % of the water depth. Vertical resolution is approximately 1 % of the water depth. Data were collected along tracklines oriented approximately northeast-southwest, parallel to the local isobaths, and spaced about 100 m apart. The frequency of the sonar was 95 kHz. Sound velocity profiles were obtained and input into the Simrad processing system to correct for refraction. Navigation was by means of differential GPS. Operation of the Simrad EM1000 was carried out by hydrographers of the Canadian Hydrographic Service. The data were collected on Woods Hole Coastal and Marine Science Center field activity 1998-015-FA.
Process_Step:
Process_Description:
Processing of the data was carried out by USGS personnel with assistance from the Ocean Mapping Group at the University of New Brunswick (UNB), Canada. A suite of processing software (called swathed) developed by the Ocean Mapping Group (<www.omg.unb.ca/~jhc/SwathEd.html>) was used to process, edit, and archive the bathymetric soundings. These routines are designed to be run on a Unix and/or Linux operating system. The processing and editing steps carried out on board the ship were:

1. Demultiplex (unravel) the Simrad data files using RT to generate separate files for a given raw file (filename.raw_all) containing navigation (filename.nav), depth soundings (filename.merged), sidescan sonar backscatter values (filename.merged_ssdata), acquisition parameters (filename.param) sound velocity at the transducer (filename.sv_tdcr) and sound velocity profiler information (filename.svp). ? Command line: RT -packdown -background -WRITE -em1000 -CnC -prefix RawFiles/ -suffix _raw.all -out ProcessedFiles/InputFilenamePrefix InputFilenamePrefix

2. Edit the navigation data on-screen using the SwathEd routine jview to remove undesirable points, including turns at the ends of survey lines. Jview also rejects stray GPS fixes outside of the survey area, as set by the operator.

Command line: jview -rejectnav -navedit filename.nav

3. Make a copy of the edited navigation, and then create a new navigation file that has the bad fixes deleted from it.

Command line: mv filename.nav filename.nav_all

Command line: appendNav -goodonly -comp filename.nav filename.nav_all

4. Merge the edited navigation back into the file containing the depth soundings using just the prefix of the filename. The location of the antenna relative to the motion reference unit is also entered here, along with a maximum time gap (in seconds) allowed between navigation fixes.

Command line: mergeNav -ahead 5.379 -right 3.851 -below 4.244 -time_limit 300 filename

5. Edit the multibeam soundings for each trackline. SwathEd displays blocks of data across and along the trackline. Anomalous points were identified by comparison to other points and by an understanding of the sea floor geology and morphology. Anomalous soundings were removed.

Command line: swathed filename.merged
Process_Date: 1998
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: William W. Danforth
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
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_Electronic_Mail_Address: wdanforth@usgs.gov
Process_Step:
Process_Description:
Map the bathymetric soundings from each processed data file onto a digital terrain model (DTM) in the Mercator projection using weigh_grid with grid nodes spaced at 3 meters. The weigh_grid program creates a DTM by summing up the weighted contributions of all the provided data into the DTM. The weighted contributions only extend to a user defined region around the true location of the estimate (the cutoff). The weight of an individual point contribution decays away from the node location based on the order of the Butterworth (inverse weighting) filter (-power n), the width of the flat topped radius of the weighting function (-lambda n.n), and the absolute cutoff limit (-cutoff) that will be used for data points contributing to a node. In addition, each beam/other value can be pre-weighted if required to account for its reliability. A custom weight file for each beam is created by hand and input into the weigh_grid program using the -custom_weight option. Three files are created which are used by the weigh_grid program. An ".r4" file, which contains the grid node values in binary format, an "r4_weights" file, and an "r4_weight_depth" file. To do the summing of the weights, the .r4_weights file contains the sums of the weights for each data point contributing to the node, and the .r4_weight_depth file contains the sum of the weights x the depths. Naturally the solution is: weight_depth/weights for each node. For more information, visit the OMG website at <http://www.omg.unb.ca>.

First a blank binary grid and the weights and weight_depth files must be created:

Command line: make_blank -float gridFile

This command commences a dialog to enable an 8 bit image and input the map boundaries and resolution. The program also prompts for the projection type and parameters to be used creating the binary map file (custom Mercator projection, central longitude of -75 degrees, latitude of true scale 40 degrees north). The next command creates the weights and weight_depth files associated with the binary grid:

Command line: tor4 gridFile

These two steps create all three files with a gridFile prefix.

Next, each individual data file (.merged suffix) is added to the grid using weigh_grid. The grid of the Fire Island data was created with a grid node spacing of 3 meters, a cutoff radius of 6 meters, and an inner radius to the weighting function of 1.5 meters:

Command line: weigh_grid -omg -tide -coeffs -mindep -2 -maxdep -800 -beam_mask -beam_weight -custom_weight EM1000_Weights -butter -power 2 -cutoff 6 -lambda 1.5 gridFile filename.merged
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: William W. Danforth
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
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_Electronic_Mail_Address: wdanforth@usgs.gov
Process_Step:
Process_Description:
Processing to further edit and correct the data and to produce final grids and images of the data included:

1. Correct errors in soundings due to sound refraction, caused by variations in sound velocity profile, using the SwathEd refraction tool. These artifacts can be recognized in a cross-swath profile of a relatively flat patch of sea floor. When viewing the swath data across a profile, the sea floor will appear to have a "frown" or "smile" when in fact the data should be flat across the profile. Insufficient and/or erroneous sound velocity information, which is usually due to widely spaced or non-existent velocity profiles within an area, results in an under or over-estimate of water depth which increases with distance from the center of the swath. For a discussion of how this effect can be recognized in a swath bathymetric data file, see < http://www.omg.unb.ca/AAAS/UNB_Seafloor_Mapping.html>.

2. Remove erroneous soundings that were not edited in the field using the SwathEd program.

3. The measured elevations were adjusted for tidal fluctuations by subtracting tidal elevations and mean sea level predicted by the ADCIRC tidal model (Westerink and others 1994; Luettich and Westerink, 1995). A MATLAB script was used to interpolate the ADCIRC constituents along the ship track and then calculate the tidal elevation and mean sea level at the time of the survey. The vertical datum of the ADCIRC correction is NAVD88.

Using the adjusted tidal elevations, create a binary tide file to be using in merging the tidal heights with the bathymetric soundings.

Command line: binTide -year YYYY asciiTideFile BinaryTideFile

The program mergeTide brings the swath soundings to the NAVD88 datum and corrected for predicted tide:

Command line (tides): mergeTide -tide BinaryTideFile filename.merged

4. Create a new 3 meter grid of the bathymetric soundings using the SwathEd routine weighgrid.

Command line: weigh_grid -fresh_start -omg -tide -coeffs -mindep -2 -maxdep -800 -beam_mask -beam_weight -custom_weight EM1000_Weights -butter -power 2 -cutoff 6 -lambda 1.5 gridFile filename.merged

5. Convert binary bathymetric grid to Esri ASCII raster format:

Command line: r4toASCII gridFile.r4

This creates a file called gridFile.asc.

References cited:

Westerink, J.J., R.A. Luettich, Jr. and J. Muccino, 1994, Modeling Tides in the Western North Atlantic Using Unstructured Graded Grids: Tellus, v. 46a(2), p. 178-199.

Luettich, R.A., Jr. and Westerink, J.J. , 1995, Continental Shelf Scale Convergence Studies with a Barotropic Tidal Model, Quantitative Skill Assessment for Coastal Ocean Models, in Lynch, D. and Davies, A. [eds.], Coastal and Estuarine Studies series, v. 48, p. 349-371, American Geophysical Union Press, Washington, D.C.
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: William W. Danforth
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
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_Electronic_Mail_Address: wdanforth@usgs.gov
Process_Step:
Process_Description:
An Esri bathymetry grid was created by importing data from ASCII raster format into Esri grid format.
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: William W. Danforth
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
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_Electronic_Mail_Address: wdanforth@usgs.gov
Process_Step:
Process_Description:
Change depth from positive to negative using the Negate function in ArcToolbox - Spatial Analyst Tools - Math - Trigonometric (ArcGIS 9.3). The SwathEd processing software produced depth as positive values.
Process_Date: 2014
Source_Produced_Citation_Abbreviation: fire_bath3m
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Bradford Butman
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2212
Contact_Electronic_Mail_Address: bbutman@usgs.gov
Process_Step:
Process_Description: USGS Thesaurus keywords added to the keyword section.
Process_Date: 20180720
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword, 20200810. Removed space in originator name, 20210924.
Process_Date: 20210924
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 2614
Column_Count: 4839
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Mercator
Mercator:
Standard_Parallel: 40.000000
Longitude_of_Central_Meridian: -75.000000
False_Easting: 0.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 3.000000
Ordinate_Resolution: 3.000000
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:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.01
Altitude_Distance_Units: meters
Altitude_Encoding_Method: Implicit coordinate
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
3-m resolution ESRI binary grid of sea floor elevation (in meters) referenced to NAVD88. The soundings were corrected for tidal fluctuations using the ADCIRC tidal model. The model produces harmonic constituents and a mean component relative to the NAVD88 datum. Correcting survey water levels using ADCIRC-predicted water levels are thus relative to NAVD88 datum. Deviation from the NAVD88 datum will be due errors in the ADCIRC correction, other fluctuations in sea level during the survey, and deviation of mean sea level from NAVD88 due to ocean dynamics. Depth is reported as negative altitude. Range is -16.3 m to -23.2 m.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - ScienceBase
Contact_Address:
Address_Type: mailing and physical address
Address: Denver Federal Center
Address: Building 810
Address: MS 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
fire_bath3m.zip: contains the Esri binary grid fire_bath3m, comprised of the fire_bath3m folder and an info folder, and associated FGDC-compliant metadata (CSDGM format).
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 grid
Format_Information_Content:
Esri bathymetric grid and associated metadata from a multibeam survey offshore of Fire Island Inlet, New York, compressed in a WinZip (version 14) file
File_Decompression_Technique: zip
Transfer_Size: 2.7
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The network resource directs to a landing page where the zip file containing the data can be downloaded.
Fees: none
Technical_Prerequisites:
The grid of bathymetry is compressed into a WinZip (version 14) file (fire_bath3m.zip). To utilize these data, the user must have software capable of uncompressing the zip file and importing and viewing an Esri ArcRaster grid. The grid consists of two folders, one with the "grid name," and one "info" folder. The two folders must be uncompressed to the same folder.
Metadata_Reference_Information:
Metadata_Date: 20210924
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Bradford Butman
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2212
Contact_Electronic_Mail_Address: bbutman@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_F7Z899GG/fire_bath3m_meta.html>
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