H12013_INTGEO: Combined 2-m and Interpolated 10-m Bathymetric
Grid of National Oceanic and Atmospheric Administration (NOAA)
Survey H12013 Off the Entrance to the Connecticut River in
Northeastern Long Island Sound (Geographic, WGS-84)
Originator: National Oceanic and
Atmospheric Administration
Originator: U.S. Geological Survey
Publication_Date: 2013
Title:
H12013_INTGEO: Combined 2-m and Interpolated 10-m
Bathymetric Grid of National Oceanic and Atmospheric
Administration (NOAA) Survey H12013 Off the Entrance
to the Connecticut River in Northeastern Long Island
Sound (Geographic, WGS-84)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster
digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2012-1103
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) and the Connecticut Department of Energy and
Environmental Protection (CT DEEP), is producing
detailed geologic maps of the coastal sea floor.
Bathymetry and sidescan-sonar imagery, originally
collected by NOAA for charting purposes, provide 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 April-May
2009 NOAA completed hydrographic survey H12013 offshore
of the entrance to the Connecticut River, and during
November 2009 and April 2010 bottom photographs and
surficial sediment data were acquired as part of two
ground-truth reconnaissance surveys of this area. Two
interpretive data layers were derived from the multibeam
echo-sounder and the ground-truth data used to verify
them. For more information on the ground-truth surveys
see: <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2009-059-FA>
and <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-010-FA>
Purpose:
To release a combined 2-m and interpolated 10-m grid
of the multibeam bathymetry generated during NOAA survey
H12013 off the entrance to the Connecticut River in
northeastern Long Island Sound in a geographic WGS84
coordinate system.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20090419
Ending_Date: 20090517
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None
planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.345648
East_Bounding_Coordinate: -72.236465
North_Bounding_Coordinate: 41.302825
South_Bounding_Coordinate: 41.227151
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: NOAA survey H12013
Theme_Keyword: H12013
Theme_Keyword: National Oceanic and
Atmospheric Administration
Theme_Keyword: NOAA
Theme_Keyword: grid
Theme_Keyword: Open-File Report 2012-1103
Theme_Keyword: ArcRaster grid
Theme_Keyword: OFR 2012-1103
Theme_Keyword: RESON 7125
Theme_Keyword: bathymetry
Theme_Keyword: Connecticut Department of
Energy and Environmental Protection
Theme_Keyword: CT DEEP
Theme_Keyword: NOAA Ship Thomas Jefferson
Theme_Keyword: RESON 8125
Theme_Keyword: interpolated
Theme_Keyword: interpolated grid
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: Connecticut
Place_Keyword: U.S. East Coast
Place_Keyword: United States
Place_Keyword: North America
Place_Keyword: Atlantic Ocean
Place_Keyword: Long Island Sound
Place_Keyword: Old Lyme
Place_Keyword: Old Saybrook
Place_Keyword: Lynde Point
Place_Keyword: Griswold Point
Place_Keyword: Long Sand Shoal
Place_Keyword: Connecticut River
Place_Keyword: Hatchett Point
Place_Keyword: Hatchett Reef
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.
Thumbnail image showing the interpolated grid of the
multibeam bathymetry generated during NOAA survey H12013
off the entrance to the Connecticut River in
northeastern Long Island Sound in a geographic WGS84
coordinate system.
Browse_Graphic_File_Type: GIF
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: P. Tod Schattgen
Publication_Date: 2008
Title: H12013
Edition: 1.0
Geospatial_Data_Presentation_Form:
document
Series_Information:
Series_Name: Descriptive Report
Issue_Identification: H12013
Publication_Information:
Publication_Place: Atlantic
Hydrographic Branch, Norfolk, VA
Publisher:
National Ocean Survey, National Oceanic and
Atmospheric Administration
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 positions of the ship and launches
acquiring multibeam bathymetry were determined with
Trimble DSM212L DGPS receivers. Best expected
position accuracy of the surface vessels with the
Trimble system less than 1 meter.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Attitude of the vessel (e.g. pitch, roll, and
heave) acquiring multibeam bathymetry was monitored
by an Applanix TSS POS/MV 320 Version 3 GPS aided
navigation system. The vertical accuracy of the
original bathymetry data is approximately 0.5% of
the water depth, however, this accuracy is somewhat
less in areas where the data is interpolated. Tidal
zone corrections were calculated from the tide
stations at New London and New Haven, Connecticut.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
National Ocean Survey, National Oceanic
and Atmospheric Administration
Publication_Date: Unpublished
Material
Title: H12013 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: 20090419
Ending_Date: 20090517
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 H12013 during April-May 2009 off the entrance
to the Connecticut River, northeastern Long Island
Sound. The MBES data on launch 3101 were collected
with a hull-mounted RESON SeaBat 455-kHz 8125
shallow-water system. This system measures two-way
sound travel time across a 120-degree swath. The
SeaBat 8125 has 240 beams with a cross-track beam
width of 0.5 degrees at nadir. The MBES data were
collected aboard the ship and launch 3102 with RESON
7125 systems 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 1 m for the deeper areas.
Vertical resolution of the MBES data is about 0.5%
of the water depth. The bathymetric data were
acquired and logged with HYPACK Hysweep 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 2009 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 the tide 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 and Data Acquisition and Processing
reports. The combined BASE-surface data were gridded
to 2-m resolution and saved as a CARIS HIPS/SIPS
v6.1 SP2 database in UTM Zone 18, NAD83.
Opened the 2-m fieldsheet provided by NOAA NOS
(H12013_Mosaic_Complete.fsh) and a new fieldsheet
H12013_sda.fsh. Ran the "Combine base surface"
process to create a 10m resolution base surface
(10m_combined.csar) from the 2m base surface
H12013_2mCombined.csar. Ran 1 iteration of
interpolation on the 10m base surface to fill the
gaps and create a 100% coverage base surface
(10m_combined_Interp.csar). Exported to Bathymetric
Attributed Grid (BAG) file (10m_combined_Interp.bag)
Imported the BAG file (10m_combined_Interp.bag)
to an IVS Fledermaus SD file
(10m_combined_Interp.sd) using DMagic v.7.2.
Imported SD files H12013_2m_combined.sd (created
while producing the 2-m UTM grid released elsewhere
in this report) and 10m_combined_Interp.sd into
DMagic v.6.7 (this version used because of a bug in
current version whereby the surfacemerge process is
broken) and created DTM files
(H12013_2m_combined.dtm and 10m_combined_Interp.dtm)
Ran the process dtmmerge to combine the DTM files
(H12013_2m_combined.dtm and
10m_combined_Interp.dtm), creating the DTM file
outtemp67.dtm using the IVS v.6.7 FMCommand
(dtmmerge -in H12013_2m_combined.dtm
10m_combined_Interp.dtm -out outtemp67.dtm -cellsize
2 -mode highres) This was done to create a merged
DTM that would essentially preserve the 2 meter
resolution where it exists, and fill the gaps with
data from the interpolated 10 meter grid. The input
order doesn't matter because the command specified
"-mode highres" which gives priority to the higher
resolution input dataset.
Using IVS Fledermaus DMagic v.7.2, imported
output of the dtmmerge process (outtemp67.dtm) to a
SD file (outtemp67.sd) and exported the SD surface
to an ArcView Grid (2m_interp.asc) This is done to
convert the new merged DTM into an SD file, so that
it could be then converted to an ArcView grid.
Using ArcCatalog v.9.3, converted ArcView Grid
(2m_interp.asc) to ESRI 32-bit floating point grid:
h12013_intutm (ArcToolbox - Conversion Tools - To
Raster - ASCII to Raster) and defined projection for
grid h12013_intutm as NAD83 UTM zone 18 (ArcToolbox
- Data Management Tools - Projections and
Transformations - Projection). The output data type
chosen was "float".
Projected the raster grid h12013_intutm to
Geographic coordinate system WGS84 datum creating
the grid h12013_intgeo using ArcCatalog v.9.3.
(ArcToolbox - Data Management Tools - Projections
and Transformations - Raster - Project Raster)
Parameters used were the default values.
Depth_Encoding_Method: Explicit depth
coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
An interpolated grid of the multibeam bathymetry
generated during NOAA survey H12013 off the entrance to
the Connecticut River in northeastern Long Island Sound
in a geographic WGS84 coordinate system. A
continuous-coverage perspective is generated by
superimposing a 2-m grid over a 10-m interpolated grid,
subtracting the areas of overlap from the 10-m
interpolated grid, and combining these two datasets so
that the gaps in the 2-m grid are filled in by 10-m
interpolated data. Anomalies present in this dataset
(i.e. areas of decreased vertical resolution and
accuracy) are a product of the interpolation.
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 Energy and Environmental Protection (CT DEEP)
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 DEEP
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 (h12013_intgeo.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: 2013
Metadata_Reference_Information:
Metadata_Date: 20120823
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