H12013_INT2M_UTM18.TIF: Color Shaded-Relief GeoTIFF Image Showing the Combined 2-m and Interpolated 10-m Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H12013 Off the Entrance to the Connecticut River in Northeastern Long Island Sound (UTM Zone 18, NAD83)
Originator: National Oceanic and Atmospheric Administration
Originator: U.S. Geological Survey
Publication_Date: 2013
Title:
H12013_INT2M_UTM18.TIF: Color Shaded-Relief GeoTIFF Image Showing the Combined 2-m and Interpolated 10-m Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H12013 Off the Entrance to the Connecticut River in Northeastern Long Island Sound (UTM Zone 18, NAD83)
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 color shaded-relief GeoTIFF of the interpolated bathymetry generated from NOAA survey H12013 off the entrance to the Connecticut River in northeastern Long Island Sound in UTM Zone 18, NAD83.
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: -72.236466
North_Bounding_Coordinate: 41.302827
South_Bounding_Coordinate: 41.227158
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: 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: GeoTIFF
Theme_Keyword: Open-File Report 2012-1103
Theme_Keyword: OFR 2012-1103
Theme_Keyword: hill-shaded
Theme_Keyword: RESON 7125
Theme_Keyword: Connecticut Department of Energy and Environmental Protection
Theme_Keyword: CT DEEP
Theme_Keyword: NOAA Ship Thomas Jefferson
Theme_Keyword: RESON 8125
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Theme_Keyword: oceans
Theme_Keyword: imageryBaseMapsEarthCover
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: Connecticut River
Place_Keyword: Old Lyme
Place_Keyword: Old saybrook
Place_Keyword: Lynde Point
Place_Keyword: Griswold Point
Place_Keyword: Long sand Shoal
Place_Keyword: Hatchett Poinr
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.
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:
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 bathymetry data is interpolated. Although there are no depth attributes associated with the GeoTiff image, pixel values convey RGB values of individual cells. Warmer colors (e.g. red) are shallower depths; cooler colors are deeper.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
National Ocean Survey, National Oceanic and Atmospheric Administration
Publication_Date: Unpublished Material
Title: H12013 bathymetry
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 data were gridded to 2-m resolution and saved as a CARIS HIPS/SIPS vv6.1 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). This is done to convert the new merged DTM into an SD file, so that it could be then converted to an ArcView grid.
Opened IVS SD file outtemp67.sd and exported GeoTIFF image h12013_int2m_utm18.tif (DTM Tools - Export Surface as Image) using IVS Fledermaus v.7.2. Using IVS Fledermaus DMagic v7.2, opened the image UTM_2m_interp.tif to edit image to remove transparency channel, apply hill-shading, and save. Sun illumination was from the northeast at 45 degrees above the horizon. Vertical exaggeration is 5x.
Using Mentor Software GeoTIFF Examiner (no version), created TIFF world file (h12013_int2m_utm18.tfw) from the GeoTIFF image that was created in the previous step.
Using Adobe Photoshop CS4, replaced the black background with a white background where there was no data. Used Mentor Software GeoTIFF Examiner to restore the georeferencing information in the GeoTIFF.
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:
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
A color-encoded hill-shaded GeoTIFF of the combined 2-m and interpolated 10-m multibeam bathymetry generated during NOAA survey H12013 off the entrance to the Connecticut River in northeastern Long Island Sound in UTM Zone 18, NAD83. 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. While there are no attributes associated with the color-encoded hill-shaded GeoTIFF image, pixel values convey RGB values of individual cells. Warmer colors (e.g. red) are shallower depths; cooler colors (e.g. purple) are deeper. 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: GeoTIFF
Format_Specification: TIFF
Format_Information_Content:
One file (h12013_int2m_utm18.zip) containing the GeoTIFF, world file, 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: Gbytes
Recording_Format: UDF
Fees: None
Technical_Prerequisites:
This image is available as a GeoTIFF image with an accompanying world file. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware.
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