slopedeg_fm3- Nahant to Gloucester, Bathymetric Slope in degrees
Nahant to Gloucester, Bathymetric Slope in degrees layer

Data format: Raster Dataset - ESRI GRID

File or table name: slopedeg_fm3

Coordinate system: Universal Transverse Mercator

Theme keywords: USGS, Bathymetry, Seafloor, Marine Geology, Swath Bathymetry, Interferometric Sonar, oceans and estuaries, elevation

Abstract: These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey, Coastal and Marine Geology Program. Woods Hole Science Center. Project data were collected during two separate surveys in the Fall of 2003 (RAFA03007) and the Spring of 2004 (RAFA04002). Bathymetric data were collected with a SEA/Submetrix 2000 series interferometric 234 kHz sonar. The sonar was pole-mounted on the R/V Rafael. Survey line spacing was 100m

FGDC and ESRI Metadata:

Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:


Citation:
Citation information:
Originators: Brian D. Andrews


Title:
slopedeg_fm3- Nahant to Gloucester, Bathymetric Slope in degrees
*File or table name: slopedeg_fm3


Publication date: 2005
*Geospatial data presentation form: raster digital data


Series information:
Series name: Open-File Report
Issue identification: 2005-1293

Publication information:
Publication place: Woods Hole Science Center, Woods Hole, Massachusetts
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online linkage: http/pubs.usgs.gov/2005/1293/


Larger work citation:
Citation information:
Originators: Walter A. Barnhardt, Brian D. Andrews, Bradford Butman


Title:
High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts


Publication date: 2006


Series information:
Series name: Open-File Report
Issue identification: 2005-1293

Publication information:
Publication place: Woods Hole Science Center, Woods Hole, Massachusetts
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online linkage: http/pubs.usgs.gov/of/2005/1293/gis/OFR_2005_1293/grids/


Description:
Abstract:
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey, Coastal and Marine Geology Program. Woods Hole Science Center. Project data were collected during two separate surveys in the Fall of 2003 (RAFA03007) and the Spring of 2004 (RAFA04002).

Bathymetric data were collected with a SEA/Submetrix 2000 series interferometric 234 kHz sonar. The sonar was  pole-mounted on the R/V Rafael. Survey line spacing was 100m

Purpose:
Swath bathymetry was collected over 127 kmē area covering a portion of the South Essex Ocean Sanctuary to characterize the surface and subsurface of the seafloor for regional geologic framework investigations.

Bathymetric data were collected during two different surveys. Survey RAFA03007 
began Monday, 22 Sep 03 (JD267) and ended on Tuesday, 14 Oct 03 (JD287). RAFA04002 began 17 Apr 04 (JD 108) and ended on 2 May 04 (JD123).

*Language of dataset: en


Time period of content:
Time period information:
Range of dates/times:
Beginning date: 20030922,20040412
Ending date: 20031015,20040507

Currentness reference:
ground condition

Status:
Progress: Complete
Maintenance and update frequency: None planned

Spatial domain:
Bounding coordinates:
*West bounding coordinate: -70.937266
*East bounding coordinate: -70.664555
*North bounding coordinate: 42.575257
*South bounding coordinate: 42.391023

Local bounding coordinates:
*Left bounding coordinate: 341000.000000
*Right bounding coordinate: 363000.000000
*Top bounding coordinate: 4715000.000000
*Bottom bounding coordinate: 4695000.000000

Keywords:
Theme:
Theme keywords: USGS, Bathymetry, Seafloor, Marine Geology, Swath Bathymetry, Interferometric Sonar
Theme keyword thesaurus: General

Theme:
Theme keywords: oceans and estuaries, elevation
Theme keyword thesaurus: ISO 19115 Topic Category

Place:
Place keywords: South Essex Ocean Sanctuary, Massachusetts Bay, Atlantic Ocean, Salem Sound
Place keyword thesaurus: General

Stratum:
Stratum keywords: Seafloor
Stratum keyword thesaurus: General

Temporal:
Temporal keywords: 2003, 2004
Temporal keyword thesaurus: General

Use constraints:
Data are not intended for navigational use.

These data should not be used at resolutions for which it is not intended.

Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution.  Please recognize the U.S. Geological Survey (USGS) as the source of this information.

Point of contact:
Contact information:
Contact person primary:
Contact person: Brian Andrews
Contact organization: U.S. Geological Survey
Contact position: Marine Geographer


Contact address:
Address type: mailing and physical address
Address:
384 Woods Hole Rd.
City: Woods Hole
State or province: MA
Postal code: 02543
Country: USA

Contact voice telephone: 508-548-8700
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: bandrews@usgs.gov


Browse graphic:
Browse graphic file name: se_5mbath
Browse graphic file type: GIF

Data set credit:
USGS, Coastal and Marine Geology Program

*Native dataset format: Raster Dataset
*Native data set environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535


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Data Quality Information:


Logical consistency report:
These data have not been compared to previous hydrographic data, although they generally agree with qualitative comparison of published NOAA charts.

Positional accuracy:
Vertical positional accuracy:
Vertical positional accuracy report:
Depths were collected using real-time kinematic differential global positioning system (RTK/DGPS) and referenced to mean sea level. Vertical datum was changed to mean lower low water during final gridding.

Lineage:
Process step:
Process description:
Soundings we collected with the SEA Submetrix 2000 aquisition software and exported to a .sxr file format

Process software and version: Sea Submetrix 2000


Process step:
Process description:
.sxr files were unravel using LINUX-based scripts and Swathed from University of New Brunswick's Ocean Mapping Group. Data were reviewd line by line and any bad soundings were removed.

Process software and version: OMG Swathed


Process step:
Process description:
Soundings data were gridded using the weigh_grid routines from Swathed. Soundings were corrected to mean lower low water during the weigh_grid operation using the real time kinematic differential Global positioning navigation files.

The final weigh_grid paramaters used were:
weigh_grid -omg -coeffs -butter -lambda 5 -cutoff 20  

Max_incidence angle was not used in most lines to use all of the swath. Only lines from rough days or big heave were gridded with a small incidence angle to maximize the good data from adjacent lanes and reduce the bad data.

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Spatial Data Organization Information:


*Direct spatial reference method: Raster


Raster object information:
*Image format: ESRI GRID
*Number of bands: 1


*Row count: 4000
*Column count: 4400
*Vertical count: 1


*Cell size X direction: 5.000000
*Cell size Y direction: 5.000000


*Bits per pixel: 32
*Pyramid layers: TRUE
*Image colormap: FALSE
*Compression type: Default


*Raster object type: Grid Cell
*Raster display type: matrix values
*Raster origin: Upper Left


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Spatial Reference Information:


Horizontal coordinate system definition:
Coordinate system name:
*Projected coordinate system name: WGS_1984_UTM_Zone_19N
*Geographic coordinate system name: GCS_WGS_1984

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: 5.000000
*Ordinate resolution: 5.000000
*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

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Entity and Attribute Information:


Detailed description:
Entity type:
Entity type label: Pixel Value
Entity type definition:
Depth in meters referenced to mean lower low water (MLLW)
Entity type definition source:
USGS

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Distribution Information:


Resource description: Downloadable Data


Standard order process:
Digital form:
Digital transfer information:
*Transfer size: 70.515
*Dataset size: 70.515

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Metadata Reference Information:


*Metadata date: 20060123


*Language of metadata: en


Metadata contact:
Contact information:
Contact person primary:
Contact person: Brian Andrews
Contact organization: U.S. Geological Survey
Contact position: Marine Geographer


Contact address:
Address type: mailing and physical address
Address:
384 Woods Hole Rd.
City: Woods Hole
State or province: MA
Postal code: 02543
Country: USA

Contact voice telephone: 508-548-8700
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: bandrews@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/metadata/esriprof80.html
*Profile name: ESRI Metadata Profile

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Binary Enclosures:


Thumbnail:
Enclosure type: Picture


Nahant to Gloucester, Bathymetric Slope in degrees layer

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