BATHY_2MH: Hillshade of bathymetry collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, MA 2007 (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: 2009

Title:

BATHY_2MH: Hillshade of bathymetry collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, MA 2007 (ESRI BINARY GRID)

Edition: 1.0

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2008-1288

Publication_Information:

Publication_Place: Woods Hole

Publisher: U.S. Geological Survey

Online_Linkage: <https://pubs.usgs.gov/of/2008/1288/GIS_catalog.zip>

Online_Linkage: <https://pubs.usgs.gov/of/2008/1288/html/gis.html>

Online_Linkage:

<https://pubs.usgs.gov/of/2008/1288/GIS_catalog/Bathy/bathy_2mh.zip>

Larger_Work_Citation:

Citation_Information:

Originator: Denny, J.F.

Originator: Danforth, W.W.

Originator: Foster, D.S.

Originator: Sherwood, C.R.

Publication_Date: 2009

Title:

Geophysical Data Collected off the South Shore of Martha's Vineyard, Massachusetts

Edition: 1.0

Geospatial_Data_Presentation_Form: online

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2008-1288

Publication_Information:

Publication_Place: Woods Hole

Publisher: U.S. Geological Survey

Online_Linkage: <https://pubs.usgs.gov/of/2008/1288/>

Description:

Abstract:

The USGS Woods Hole Science Center conducted a nearshore geophysical survey offshore of the southern coast of Martha's Vineyard, in the vicinity of the Martha's Vineyard Coastal Observatory (MVCO) in August 2007. This mapping program was part of a larger research effort supporting the Office of Naval Research (ONR) Ripples Directed-Research Initiative (DRI) studies at MVCO by providing data collection and modeling. The geophysical data will be used to provide initial conditions for wave and circulation models for the study area. Ultimately, geophysical mapping, oceanographic measurements and modeling will help to improve our understanding of coastal sediment-transport processes.

The geophysical mapping utilized a suite of high-resolution instrumentation to map the surficial sediment distribution, depth and sub-surface geology: dual-frequency 100/500 KHz sidescan-sonar system, 234-KHz interferometric sonar, and 500 Hz -12 KHz chirp sub-bottom profiler. The survey was conducted aboard the M/V Megan Miller August 9-13, 2007. The study area covers 35 square kilometers from about 0.2 km to 5-km offshore of the south shore of Martha's Vineyard, and ranges in depth from ~ 5 to 20 meters.

Purpose:

This bathymetric data set will be used to define the seafloor morphology in the vicinity of the Martha's Vineyard Coastal Observatory and to provide initial conditions for wave and circulation modeling. The hillshade provides a false sun-illuminated view of the seafloor which can enhance seafloor features and aid in the interpretation of the seafloor topography.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20070809

Ending_Date: 20070813

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.601447

East_Bounding_Coordinate: -70.510810

North_Bounding_Coordinate: 41.349941

South_Bounding_Coordinate: 41.300598

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: USGS

Theme_Keyword: Woods Hole Science Center

Theme_Keyword: WHSC

Theme_Keyword: Coastal and Marine Geology Program

Theme_Keyword: CMGP

Theme_Keyword: Field Activity Number 07011

Theme_Keyword: R/V Megan Miller

Theme_Keyword: Bathymetry

Theme_Keyword: Interferometric sonar

Theme_Keyword: ESRI Grid

Theme_Keyword: SEA SWATHplus 234 kHz

Theme_Keyword: Hillshade

Theme:

Theme_Keyword_Thesaurus: ISO 19115

Theme_Keyword: oceans

Theme_Keyword: oceans and estuaries

Theme_Keyword: oceans and coastal

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: North America

Place_Keyword: Southeastern Massachusetts

Place_Keyword: Martha's Vineyard

Place_Keyword: Cape Cod

Place_Keyword: Elizabeth Islands

Place_Keyword: Atlantic Ocean

Place_Keyword: United States

Place_Keyword: Northeast United States

Place_Keyword: Atlantic Ocean

Access_Constraints: None

Use_Constraints:

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 Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: (508) 548-8700x2311

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<https://pubs.usgs.gov/of/2008/1288/GIS_catalog/Bathy/bathy_2mh_sm.jpg>

Browse_Graphic_File_Description:

Thumbnail image of hillshade of the bathymetric data collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, 2007

Browse_Graphic_File_Type: JPEG

Data_Set_Credit: U.S. Geological Survey

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850

Data_Quality_Information:

Logical_Consistency_Report:

All bathymetric data were collected during USGS cruise 07011 using a SWATHplus swath bathymetric system and a Coda Octopus F180R motion reference unit. Quality control was conducted during processing of the data. Any spurious data or artifacts were removed or minimized.

Completeness_Report:

All bathymetric data collected during USGS cruise 07011 off of the south shore of Martha's Vineyard were used to generate the hillshade of the bathymetry. Tie lines that fell close to areas of obstruction (e.g. MVCO 12-m node and tower), were not included in the final grid due to poor data quality.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Differential Global Positioning System (DGPS) navigation data were acquired with the forward, or primary, Coda Octopus F180R Motion Reference Unit (MRU) DGPS antenna and transmitted via a network connection to the SWATHplus data collection software. The F180R MRU is part of the rigid sidemount used to deploy the SWATHplus bathymetric system, and is mounted on the bracket holding the SWATHplus transducers. The F180R MRU consists of 2 L1 antennas used for position and heading. The antennas are mounted on a rigid horizontal pole, 6.76 meters above the F180R MRU, offset in a forward/aft configuration (see 'source contribution' for a full description of the F180R). DGPS accuracy is 1 to 3 meters, depending on the distance from a US Coast Guard coastal repeater station (<http://www.navcen.uscg.gov/>).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Bathymetric data were ultimately referenced to a local vertical datum. The Woods Hole Oceanographic Institution Martha's Vineyard Coastal Observatory (MVCO) maintains an instrumented node at a depth of 12 meters that records a variety of oceanographic data including water level heights above the node (<http://www.whoi.edu/mvco/description/description2.html>). Oscillation of the water level above the node is recorded in a file that was downloaded and parsed for these heights (OcnDat_s, see: <http://www.whoi.edu/mvco/data/oceandata.html>). These heights are referenced to a vertical datum of 11.68 meters, which represents a long term mean depth directly above the node (August 2006 - present). These data are not tied into any chart datum (i.e. Mean Lower Low Water). We chose to use the local water level heights because other oceanographic data from the 12-meter node will be used in conjunction with the bathymetric grid for oceanographic modeling. All data will be referenced to the local vertical datum at the 12-meter node.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20070809

Ending_Date: 20070813

Source_Currentness_Reference: ground condition

Source_Contribution:

Swath bathymetric data were collected using an SEA Ltd SWATHplus 234-kHz Interferometric Bathymetric Sonar (<http://www.sea.co.uk/swathplus.aspx?nav=products> ) during survey operations. The SWATHplus system was mounted as a sidemount and positioned on the starboard side of the R/V Megan Miller. Line spacing varied from 40 meter in ~ 5 to 15 meter water depth to 70 meters in ~15 - 25 meter water depth. Data files were recorded by SEA software SWATHplus 3.05.19 in the SWATHplus SXR format. Data collection parameters are saved into a SWATHplus session file in SEA's SXS format that can be later used for data replay.

Pitch, roll, heading, and heave information were recorded using a Coda Octopus F180R motion reference unit (MRU) (see: <http://www.codaoctopus.com/motion/f180/index.asp>) and transmitted via network connection to the SWATHplus data collection software. The MRU sensor was mounted directly above the SWATHplus transducers, thereby minimizing "lever arm" offsets which can lead to positioning and depth errors in the bathymetric data. The F180R series MRU uses two L1 antennas for position and heading accuracy. These were mounted directly above the MRU with an offset of 6.76 meters. The antennas are mounted on a rigid horizontal pole with a separation of 1 meter and are offset from the MRU in a forward/aft configuration. The forward offset of the primary antenna from the MRU is 0.5 meters, with no port/starboard offset.

Sound Velocity Profiles (SVP): Fourteen sound velocity casts were collected at various intervals during the USGS cruise 07011 using an Applied Microsystems SV Plus v2 instrument (see <http://www.appliedmicrosystems.com/products/productDetails.aspx?id=1> for details). Sound velocity profiles (SVP) were generally collected at the eastern and western ends of the survey area, corresponding to the start and/or end of geophysical line data collection. This procedure was primarily followed to coordinate collection of SVP casts with the beginning or end of trackline. This was acceptable because only small variations in the speed of sound were noted throughout the survey area and negligible refraction artifacts were visible within the swath bathymetric data.

Process_Step:

Process_Description:

Offsets of the SWATHplus transducers and DGPS navigation antenna from the F180R motion reference unit (MRU), which is the designated common reference point (CRP), were verified as entered correctly into the SWATHplus session file for the survey. Offsets forward, below, and to the right (starboard) of the CRP are considered positive: Primary navigation antenna to MRU: Height offset: -6.76 meters Forward offset: 0 meters Starboard offset: 0 meters

Draft of the MRU below water line: 2.6 meters.

Offset of SWATHplus transducer 1 (port side) from the CRP: Height offset: 0.158 meters Forward offset: -0.019 meters Starboard offset: -0.11 meters

Offset of SWATHplus transducer 2 (starboard side) from the CRP: Height offset: 0.158 meters Forward offset: -0.019 meters Starboard offset: 0.11 meters

Software: SWATHplus 3.05.19

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

Water level heights for the duration of the survey were incorporated into the SWATHplus session file. The Woods Hole Oceanographic Institution Martha's Vineyard Coastal Observatory (MVCO) maintains an instrumented node at a depth of 12 meters that records a variety of oceanographic data including water level heights above the node (<http://www.whoi.edu/mvco/description/description2.html>). Oscillation of the water level above the node is recorded in a file that was downloaded and parsed for these heights (OcnDat_s, see: <http://www.whoi.edu/mvco/data/oceandata.html>). These heights are referenced to a vertical datum of 11.68 meters, which represents a long term mean depth directly above the node (August 2006 - present). These data are not tied into any chart datum (i.e. Mean Lower Low Water). The data were reformatted for input into the SWATHplus session file and stored in the file 2007_JD221-225_tides_swathplus.dat. We chose to use these water level heights because other oceanographic data from the 12 meter node will be used in conjunction with the bathymetric grid for oceanographic modeling. Software: SWATHplus 3.05.19

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

Data from the sound velocity profiles were incorporated into the SWATHplus session file. The velocity data is stored in Microsoft Office Excel 2003 SP3 csv format, and the location and time, as well as the velocity information, were extracted from the csv file and entered into the sound velocity profile dialog in SWATHplus. One Julian day's worth of sound velocity data was entered into SWATHplus; the program is limited to a total of 5 velocity profiles at a time. Software: SWATHplus 3.05.19

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

Various filters were set in the SWATHplus software in order to refine the depth of the seafloor across the swath for each ping based on the phase and amplitude of the returning sonar signal. Only the filters listed below were set, all others were turned off. Filter settings: Low amp: 100 Range: Max amplitude 4 meters, min amplitude 0 meters Quality: 0.8 Box: Min depth 3 meters, max depth 30 meters, min horizontal range 0 meters, max horizontal range 25 - 50 meters (increasing with trackline spacing). Along track 1: Max depth difference 10 meters, window size 10, learn rate 0.6 Along track 2: Max depth difference 0.5 meters, window size 2, learn rate 0.8 Mean output processed pixel size: 1meter.

Software: SWATHplus 3.05.19

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

Patch test lines were replayed through the SWATHplus software after the tides, velocity profiles (for that day), and filters were set and saved in the SWATHplus session file. Processed data files were saved in the SWATHplus sxp format. Software: SWATHplus 3.05.19

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

The patch test processed sxp files (patch1 - patch7.sxp) were imported into the SWATHplus Grid Processor program and run 3 times through the calibration tool to determine any static offsets for roll. Results: Port roll offset = +0.64 degrees, Stbd roll offset = -0.91 degrees. These offsets were then entered into the SWATHplus session file. Software: Grid Processor 3.02.19

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

Raw SXR bathymetry data were replayed line by line through the SEA SWATHplus software to produce final processed SWATHplus sxp files. Velocity profiles were incorporated into the session file five at a time bracketing (in time) the bathymetric data collected for that line. This ensures that during the time the bathymetry data were collected, sound velocity information closest in time were utilized by the SWATHplus program to correct for variations in sound velocity through the water column, minimizing ray bending effects that can produce erroneous depth soundings. The SWATHplus software applies the pitch, roll, heave, and heading data supplied by the F180R MRU, ensuring that the depth solutions across the swath are compensated for any motion of the SWATHplus transducers due to ship motion. Software: SWATHplus 3.05.19

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

All the processed SWATHplus sxp files were imported into CARIS HIPS/SIPS software (www.caris.com) using the CARIS HIPS Conversion Wizard. The selected raw data type was SWATHplus. The conversion wizard converts the depths, navigation, and motion data recorded in the sxp files into an internal CARIS HIPS format. Software: CARIS HIPS/SIPS 6.1

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

Using the SWATHplus sxp survey lines that were imported into CARIS, a field sheet and BASE surface were generated in CARIS HIPS that encompassed the field area. The field sheet is in the UTM projection, 19N, central meridian -69.0 degrees west. The horizontal datum was chosen to be the WGS 84 ellipsoid. The extent of the field sheet is (in UTM meters): East: 366027 West: 373547 North: 4578733 South: 4573363

Software: CARIS HIPS/SIPS 6.1

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

A Bathymetry Associated with Statistical Error (BASE) Surface was generated from the survey line data using the bounds from the field sheet properties. A BASE surface is a georeferenced image of a multi-attributed, weighted-mean surface. A BASE Surface can also contain a visual representation of horizontal and vertical uncertainty. A BASE Surface file is saved with a HNS extension (HIPS Navigation Surface). An XML file with the same name as the BASE Surface is also generated when the Surface is created. This file contains the metadata for the Surface. Base surfaces were generated at a resolution of 10, 5, and 2 meters, and the surface type was set to swath angle. The maximum footprint size in the BASE surface that a sounding was utilized was set to 9 pixels, and the include status for soundings were set to accepted, examined, and outstanding. Additional attributes were set for the surface: Density, mean, and standard deviation. Software: CARIS HIPS/SIPS 6.1

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

Each of the BASE surfaces was interpolated in CARIS HIPS. The interpolation is only applied to areas of no data, and helped to fill in small gaps in the surface. Parameters used for the interpolation were: Matrix size 5X5 pixels, minimum number of neighboring pixels required for interpolation was 6. Software: CARIS HIPS/SIPS 6.1

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

The final interpolated base surfaces generated in CARIS HIPS was imported into IVS3D's Data Magician (DMagic), a program that is part of the IVS3D Fledermaus suite (www.ivs3d.com). The data magician directly imports the CARIS HNS file described above, and creates a DTM (digital terrain model) and associated geo file for each surface. Software: IVS DMagic 6.7.0

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

The DTM surfaces created in the Fledermaus Data Magician (DMagic) were converted to a Fledermaus sd file that can be used in the Fledermaus program for three dimensional visualization of the DTM. Only the highest resolution DTM surface ( 2-m resolution ) was exported from IVS Data Magician as an ArcView Grid (ESRI ASCII grid) .

Software: IVS DMagic 6.7.0

Process_Date: 2008

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Bill Danforth

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2274

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: bdanforth@usgs.gov

Process_Step:

Process_Description:

The 2 meter ESRI ASCII grid was then imported to ArcGIS 9.2 using the ASCII to Raster Tool within ArcToolbox - Conversion Tools - To Raster and output data type defined as float.

The projection of the grids was then defined as UTM, zone 19N, WGS84, using Arc Toolbox, Data Management Tools, Projections and Transformations, Define Projection.

Process_Date: 2009

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700x2311

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Process_Step:

Process_Description:

A hillshade was created using the ArcMap Spatial Analyst Extension. Spatial Analyst - Surface Analysis - Hillshade - Azimuth = 45, Altitude = 45, and z factor = 2. The hillshade was saved in ESRI Grid format, as 8-bit, unsigned integer.

Software: ArcGIS 9.2

Source_Used_Citation_Abbreviation: bathy_2m

Process_Date: 2009

Source_Produced_Citation_Abbreviation: bathy_2mh

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: (508) 548-8700x2311

Contact_Facsimile_Telephone: 5084572310

Contact_Electronic_Mail_Address: jdenny@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 2672

Column_Count: 3745

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: 19

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: 2.000534

Ordinate_Resolution: 2.000534

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

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: bathy_2mh.vat

Entity_Type_Definition: Internal Feature Number

Entity_Type_Definition_Source: ESRI

Attribute:

Attribute_Label: Rowid

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: VALUE

Attribute_Definition: 8-bit gray scale value

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 72

Range_Domain_Maximum: 237

Attribute:

Attribute_Label: COUNT

Attribute_Definition:

Number of cells within the grid that are assigned a specific 'VALUE' (8 bit gray scale pixel value)

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 1172090

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: (508) 548-8700x2311

Contact_Facsimile_Telephone: 5084572310

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: WinZip

Format_Version_Number: 9.0

Format_Information_Content:

WinZip file containing all geospatial data and metadata associated with ArcMap project file in USGS Open-File Report 2008-1288

File_Decompression_Technique: Use WinZip or pkUnzip

Transfer_Size: 790 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <https://pubs.usgs.gov/of/2008/1288/GIS_catalog.zip>

Access_Instructions: Data can be downloaded via the World Wide Web (WWW)

Fees: none

Technical_Prerequisites:

The grid contained in the GIS_catalog.zip file is available as an ESRI binary grid. To utilize this data, the user must have a GIS software package capable of reading an ESRI binary grid. The grid contained in the bathy_2m.zip file is available as an ASCII grid with an ESRI header. To utilize these data, the user must have a GIS software package capable of reading ASCII grids with ESRI headers, or be able to manipulate an ASCII matrix with a geospatial header. The ASCII raster files can be easily converted to ESRI grid format in either ArcView with Spatial Analyst extension (Import Data Source: ASCII Raster) or ArcGIS with Spatial Analyst extension (ASCII to Raster). The user should select floating point grid (as opposed to integer grid) when converting the bathymetry data.

Metadata_Reference_Information:

Metadata_Date: 20091004

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jane Denny

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: (508) 548-8700x2311

Contact_Facsimile_Telephone: 5084572310

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_Access_Constraints: None

Metadata_Use_Constraints: None

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile