H11251_2M_UTM: 2-m Bathymetric Grid of National Oceanic and Atmospheric Administration (NOAA) Survey H11251 Offshore of Rocky Point, New York (UTM Zone 18, NAD83)
Originator: National Oceanic and Atmospheric Administration
Originator: U.S. Geological Survey
Publication_Date: 2010
Title:
H11251_2M_UTM: 2-m Bathymetric Grid of National Oceanic and Atmospheric Administration (NOAA) Survey H11251 Offshore of Rocky Point, New York (UTM Zone 18, NAD83)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2010-1007
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA), is producing detailed geologic maps of the coastal sea floor. Bathymetry and sidescan-sonar imagery, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities in Long Island Sound, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. During October 2008 NOAA completed hydrographic survey H11251 offshore of Rocky Point, New York and during November 2009, bottom photographs and surficial sediment data were acquired as part of a ground-truth reconnaissance survey of this area. Interpretive data layers were derived from the multibeam echo-sounder and sidescan-sonar data and the ground-truth data used to verify them. For more information on the ground-truth survey see <http://quashnet.er.usgs.gov/data/2009/09059/>
Purpose:
To release a 2-m grid of the multibeam bathymetry generated during NOAA survey H11251 offshore of Rocky Point, New York in UTM Zone 18, NAD83.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20081007
Ending_Date: 20081027
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.411309
East_Bounding_Coordinate: -72.318114
North_Bounding_Coordinate: 41.163127
South_Bounding_Coordinate: 41.100851
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: multibeam bathymetry
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: WHCMSC
Theme_Keyword: RESON 8101
Theme_Keyword: NOAA survey H11251
Theme_Keyword: H11251
Theme_Keyword: National Oceanic and Atmospheric Administration
Theme_Keyword: NOAA
Theme_Keyword: grid
Theme_Keyword: Open-File Report 2010-1007
Theme_Keyword: ArcRaster grid
Theme_Keyword: OFR 2010-1007
Theme_Keyword: RESON 8125
Theme_Keyword: RESON 7125
Theme_Keyword: bathymetry
Theme_Keyword: Connecticut Department of Environmental Protection
Theme_Keyword: CT DEP
Theme_Keyword: NOAA Ship Thomas Jefferson
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Theme_Keyword: elevation
Theme_Keyword: oceans
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: New York
Place_Keyword: Rocky Point
Place_Keyword: U.S. East Coast
Place_Keyword: United States
Place_Keyword: North America
Place_Keyword: Atlantic Ocean
Place_Keyword: Long Island
Place_Keyword: Long Island Sound
Access_Constraints: None
Use_Constraints:
Data are not to be used for navigation purposes.
Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the National Oceanic and Atmospheric Administration (NOAA) and U.S. Geological Survey (USGS) as the originators of this information.
No additional checks for consistency were performed on this data.
Completeness_Report:
All collected data were processed and used to produce this dataset.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal position of the ship and launches acquiring multibeam bathymetry were determined by differential GPS. Real-time original horizontal resolution of the MBES data was 0.5 m for depths less than 20 m and 2 m for the deeper areas; the final CARIS combined base surface for the MBES data were produced at a 2-m cell size.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Attitude of the vessels (e.g. pitch, roll, and heave) acquiring multibeam bathymetry were monitored by Applanix TSS POS/MV 320 Version 3 GPS aided navigation systems. The vertical resolution of the original bathymetry data is approximately 0.5% of the water depth.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
National Ocean Survey, National Oceanic and Atmospheric Administration
Publication_Date: Unpublished Material
Title: H11251 bathymetry
Geospatial_Data_Presentation_Form: raster digital data
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20081007
Ending_Date: 20081027
Source_Currentness_Reference: ground condition
Source_Contribution: Original processed multibeam bathymetric data.
Process_Step:
Process_Description:
Two 8.5-m aluminum Jensen launches and the NOAA Ship Thomas Jefferson were used to acquire the multibeam echosounder (MBES) bathymetric data for survey H11251 during October 2008 offshore of Rocky Point, New York. The launch MBES data were collected with hull-mounted RESON SeaBat 240-kHz 8101 and 455-kHz 8125 shallow-water systems. These systems measure two-way sound travel time across a 150-degree swath and 120-degree swath, respectively. The SeaBat 8101 has 101 beams at a 1.5-degree beam spacing. The SeaBat 8125 has 240 beams with a cross-track beam width of 0.5 degrees at nadir. The ship's MBES data were collected with a RESON 7125 system which measured two-way sound travel time across a 140-degree swath. Original horizontal resolution of the MBES data was 0.5 m for depths less than 20 m and 2 m for the deeper areas. Vertical resolution of the MBES data is about 0.5% of the water depth. The bathymetric data were acquired in XTF (extended Triton data format) and processed by NOAA using CARIS HIPS (Hydrographic Image Processing System) software for quality control, to incorporate sound velocity and tidal corrections, and to produce the continuous digital terrain model. All positioning and attitude were determined with Trimble DSM212L DGPS receivers and Applanix POS/MV Model 320 v.4 inertial navigation systems; HYPACK MAX was used for acquisition line navigation. Sound velocity corrections were derived using frequent SEACAT CTD (conductivity-temperature-depth) profiles. Typically, a CTD cast was conducted every three to four hours of MBES acquisition. Tidal zone corrections were calculated from data acquired from National Water Level Observation stations at New London and New Haven, Connecticut. Vertical datum is mean lower low water. Individuals interested in detail descriptions of the MBES acquisition and processing should consult the descriptive reports. The data were gridded to 2-m resolution and saved as a CARIS HIPS database in UTM Zone 18, NAD83.
Converted the Fieldsheet file (h11251_ahb_2m_combined) from the NOAA CARIS database to a DTM file using IVS DMagic v6.7. The floating point format for each sounding depth point is preserved during data import. These fieldsheets were imported into DMagic as "gridded data", therefore re-gridding of data did not occur during the import process and thus preserved the original resolutions of the CARIS fieldsheet.
The ESRI ASCII raster file was then imported into ArcCatalog v9.3 and converted to an ESRI 32-bit floating point grid using the ASCII to Raster conversion tool (ArcToolbox - Conversion Tools - To Raster - ASCII to Raster).
Defined the projection as UTM Zone 18, NAD83 using ArcCatalog v9.3 (ArcToolbox - Data Management Tools - Projections and Transformations - Define Projection).
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Mean lower low water
Depth_Resolution: 0.1
Depth_Distance_Units: meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
A 2-m grid of the multibeam bathymetry from NOAA survey H11251 in the UTM Zone 18, NAD83 coordinate system.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Larry Poppe
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), nor the Connecticut Department of Environmental Protection (CT DEP) 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, NOAA, or the CT DEP 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: ARCG
Format_Specification: ESRI ArcRaster Grid
Format_Information_Content:
One file (h11251_2m_utm.zip) containing the ArcGIS grid file components, browse graphic and metadata.
Access_Instructions: Data are downloadable via the World Wide Web (WWW).
Offline_Option:
Offline_Media: DVD-ROM
Recording_Capacity:
Recording_Density: 4.75
Recording_Density_Units: Mbytes
Recording_Format: UDF
Fees: None
Technical_Prerequisites:
The user must have a program capable of reading the ESRI grid data format. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. The directory structure as it appears in the WinZip file must be maintained or else the binary grid is unusable.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2010
Metadata_Reference_Information:
Metadata_Date: 20100326
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Larry Poppe
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata