Identification_Information: Citation: Citation_Information: Originator: National Oceanic and Atmospheric Administration Originator: U.S. Geological Survey Publication_Date: 2008 Title: H11044N_MB10M_GEO.TIF: Color GeoTIFF Image of the 10-m Interpolated Bathymetric Grid of the Northern Part of National Oceanic and Atmospheric Administration (NOAA) Survey H11044 off Milford, Connecticut (Geographic) Edition: 1.0 Geospatial_Data_Presentation_Form: remote-sensing image Series_Information: Series_Name: Open-File Report Issue_Identification: 2008-1146 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2008/1146/data/bathy/geotifs/geo/h11044n_mb10m_geo.zip Online_Linkage: http://pubs.usgs.gov/of/2008/1146/html/catalog.html Larger_Work_Citation: Citation_Information: Originator: L.J. Poppe Originator: S.D. Ackerman Originator: K.Y. McMullen Originator: P.T. Schattgen Originator: J.D. Schaer Originator: E.F. Doran Publication_Date: 2008 Title: Interpolation of Reconnaissance Multibeam and Single-Beam Bathymetry Offshore of Milford, Connecticut Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2008-1146 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2008/1146/ Description: Abstract: During 2001 the NOAA Ship RUDE completed charting survey H11044 that covered a roughly 293 km2 area of the sea floor in north-central Long Island Sound, off Milford Connecticut. Although 100 percent coverage was achieved with sidescan sonar for charting purposes, only reconnaissance (spaced line) bathymetry was acquired with shallow-water multibeam and single-beam systems. Therefore, further processing was conducted at the USGS's Woods Hole Science Center to provide bathymetric datasets with more continuous coverage. This project produced grids and GeoTIFF imagery of the combined and interpolated shallow-water multibeam and single-beam bathymetry generated from the northern part of this data set. Anthropogenic wastes, toxic chemicals, and changes in land-use patterns resulting from residential, commercial, and recreational development have stressed the environment of the Sound, causing degradation and potential loss of benthic habitats. Detailed maps of the sea floor are needed to help evaluate the extent of adverse impacts and to help manage resources wisely in the future. Therefore, in a continuing effort to better understand Long Island Sound, we have interpolated and gridded shallow-water multibeam and single-beam bathymetric data within specific areas of special interest. Purpose: To release a color GeoTIFF of the 10-m grid of the shallow-water multibeam and single-beam bathymetry generated from the northern part of NOAA survey H11044 off Milford, Connecticut in a Geographic Coordinate System. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20010507 Ending_Date: 20011113 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.128979 East_Bounding_Coordinate: -72.933513 North_Bounding_Coordinate: 41.249077 South_Bounding_Coordinate: 41.127843 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Science Center Theme_Keyword: shallow-water multibeam bathymetry Theme_Keyword: bathymetry Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: WHSC Theme_Keyword: Reson 8125 Theme_Keyword: NOAA survey H11044 Theme_Keyword: H11044 Theme_Keyword: National Oceanic and Atmospheric Administration Theme_Keyword: NOAA Theme_Keyword: GeoTIFF Theme_Keyword: Open-File Report 2008-1146 Theme_Keyword: Color Theme_Keyword: OFR 2008-1146 Theme_Keyword: single-beam bathymetry Theme_Keyword: interpolated bathymetry Theme_Keyword: Odom Echotrac DF-3200 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: Long Island Sound Place_Keyword: U.S. East Coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Atlantic Ocean Place_Keyword: Milford Place_Keyword: Charles Island Place_Keyword: Stratford Point 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. Point_of_Contact: 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 Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2008/1146/data/bathy/geotifs/geo/h11044n_mb10m_geo.gif Browse_Graphic_File_Description: Thumbnail image showing the 10-m gridded bathymetry collected during NOAA survey H11044 in Geographic Browse_Graphic_File_Type: GIF Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Cross_Reference: Citation_Information: Originator: L.J. Poppe Originator: S.D. Ackerman Originator: E.F. Doran Originator: A.J. Beaver Originator: J.M. Crocker Originator: P.T. Schattgen Publication_Date: 2006 Title: Interpolation of Reconnaissance Multibeam Bathymetry from North-Central Long Island Sound Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1145 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2005/1145/ Data_Quality_Information: Completeness_Report: All collected data from the northern part of NOAA survey H11044 were processed and used to produce this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation was by differential GPS Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The vertical resolution of the shallow-water multibeam data is approximately 0.5% of the water depth. Lineage: Source_Information: Source_Citation: Citation_Information: Type_of_Source_Media: DVD-ROM Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20010507 Ending_Date: 20011113 Source_Currentness_Reference: ground condition Source_Contribution: Original processed shallow-water multibeam and single-beam bathymetric data. Process_Step: Process_Description: The multibeam data were acquired in XTF (extended Triton data format) and recorded digitally through an ISIS data acquisition system. A Reson SeaBat 9003 echosounder was used to acquire the shallow-water multibeam bathymetric data and an Odom Echotrac DF-3200 dual-frequency echosounder was used to acquire the single-beam bathymetry from the NOAA ship Rude. An Odom Echotrac DF-3200 dual-frequency echosounder hull-mounted on a 23' launch deployed from the NOAA ship Rude was used to acquire sounding data in the shallower areas. These data were processed using CARIS HIPS (Hydrographic Image Processing System) software for quality control, and to incorporate sound velocity and tidal corrections. Sound velocity corrections were derived using frequent SEACAT CTD (conductivity-temperature-depth) profiles. Typically, a CTD cast was conducted every four to six hours of multibeam acquisition. Tidal zone corrections were calculated from data acquired at tidal gauges at Bridgeport and NewHaven, Connecticut, and at Kings Point, New York. The vertical resolution of the shallow-water multibeam data is approximately 0.5% of the water depth. The data were gridded to 1.5-m resolution and exported in text (.txt) format. Vertical datum is mean lower low water; X and Y units are decimal degrees. Process_Date: Unknown Source_Produced_Citation_Abbreviation: h11044_1_5mddeg_xyz.txt Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Oceanic and Atmospheric Administration Contact_Person: Jasper Schaer Contact_Position: Field Operations Officer Contact_Address: Address_Type: mailing address Address: 439 West York Street City: Norfolk State_or_Province: VA Postal_Code: 23510 Country: USA Contact_Voice_Telephone: 757-441-6726 Contact_Electronic_Mail_Address: jasper.schaer@noaa.gov Process_Step: Process_Description: The PROJ v4.5 cartographic projections library was used to project the data to UTM zone 18 [proj +proj=utm +zone=18 +ellps=WGS84 -r -s -f %0.2f h11044_1_5mddeg_xyz.txt > UTM_H11044_1_5m.xyz]. Source_Used_Citation_Abbreviation: h11044_1_5mddeg_xyz.txt Process_Date: 2008 Source_Produced_Citation_Abbreviation: utm_h11044_1_5m.xyz Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Seth Ackerman Contact_Organization: Woods Hole Science Center 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 Contact_Voice_Telephone: 508-548-8700 x2315 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: sackerman@usgs.gov Process_Step: Process_Description: A series of GMT v4.0 (the Generic Mapping Tools) are run during this process including Minmax to determine the data bounds and to help identify anomalous values [minmax UTM_H11044_1_5m.xyz]. An AWK script was run to filter the dataset and prepare it to be processed thru the GMT block median routine [awk '{if($3>0 && $3<22 $1>4555000) printf "%6.2f\t%7.2f\t%3.2f\n",$2,$1,$3*-1}' UTM_H11044_1_5m.xyz > sda_44.end]. Based on visual inspection of the removed data points (both their location and their elevation relation to the surrounding data points) the values above 22 were indeed anomalous. Source_Used_Citation_Abbreviation: utm_h11044_1_5m.xyz Process_Date: 2008 Source_Produced_Citation_Abbreviation: sda_44.end Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Seth Ackerman Contact_Organization: Woods Hole Science Center 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 Contact_Voice_Telephone: 508-548-8700 x2315 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: sackerman@usgs.gov Process_Step: Process_Description: GMT v4.0 programs were used to create a 10-m interpolated GMT grid of the bathymetry. Interpolation was achieved during GMT processing by running the data through a block median filter [blockmedian sda_44.end -R656854.36/674854.36/4555000.52/4570000.52/ -I10/10 -V -bod > sda_44.blockmed], a surface generating algorithm [surface sda_44.blockmed -R656854.36/674854.36/4555000.52/4570000.52/ -Gsda_big44.grd -C0.1 -I10/10 -T1.0 -V -bid], and the grid cut program [grdcut sda_big44.grd -R656854.36/673134.36/4555000.52/4568110.52/ -Gsda_cut44.grd]. Processing parameters were set to default unless otherwise noted in the scripts. Source_Used_Citation_Abbreviation: sda_44.end Process_Date: 2008 Source_Produced_Citation_Abbreviation: sda_cut44.grd Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Seth Ackerman Contact_Organization: Woods Hole Science Center 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 Contact_Voice_Telephone: 508-548-8700 x2315 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: sackerman@usgs.gov Process_Step: Process_Description: The GDAL v1.3.2 (Geospatial Data Abstraction Library) commandline utility gdal_translate was used to convert the GMT grid into a 32bit GeoTIFF with proper bounds and projection information [gdal_translate -sds -a_ullr 656849.36 4554995.52 673139.36 4568115.52 -a_srs EPSG:32618 sda_cut44.grd sda_44_new2.tif]. Source_Used_Citation_Abbreviation: sda_cut44.grd Process_Date: 2008 Source_Produced_Citation_Abbreviation: sda_44_new2.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Seth Ackerman Contact_Organization: Woods Hole Science Center 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 Contact_Voice_Telephone: 508-548-8700 x2315 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: sackerman@usgs.gov Process_Step: Process_Description: The GeoTIFF created in GMT/GDAL was then clipped by a shapefile of the survey extent using ESRI ArcGIS ArcToolbox v9.2 (Spatial Analyst, Extraction, Extract by Mask). Source_Used_Citation_Abbreviation: sda_44_new2.tif Process_Date: 2008 Source_Produced_Citation_Abbreviation: h11044n_10utm Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Seth Ackerman Contact_Organization: Woods Hole Science Center 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 Contact_Voice_Telephone: 508-548-8700 x2315 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: sackerman@usgs.gov Process_Step: Process_Description: Imported the bathymetric grid into IVS Fledermaus-DMagic v6.5.1 and created the hillshade file "h11044_10mutm.shade" with azimuth 45 deg and vertical scale 8x. Opened the shade file in IVS Fledermaus-ImageViewer v6.5.1, reprojected the image to Geographic and exported as a GeoTIFF with a world file with an upper left origin. Source_Used_Citation_Abbreviation: h11044n_10utm Process_Date: 2008 Source_Produced_Citation_Abbreviation: h11044n_mb10m_geo.tif Source_Produced_Citation_Abbreviation: h11044n_mb10m_geo.tfw Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Seth Ackerman Contact_Organization: Woods Hole Science Center 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 Contact_Voice_Telephone: 504-548-8700 x2315 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: sackerman@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 1375 Column_Count: 1606 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000122 Longitude_Resolution: 0.000088 Geographic_Coordinate_Units: Decimal degrees Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 0.000122 Ordinate_Resolution: 0.000088 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: Overview_Description: Entity_and_Attribute_Overview: There are no attributes associated with the GeoTiff image. Pixel values convey RGB values of individual cells. 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, the USGS, NOAA, Connecticut Department of Environmental Protection, 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. 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: TIFF Format_Specification: GeoTIFF Format_Information_Content: One file (h11044n_mb10m_geo.zip) containing the GeoTIFF, world file, browse graphic and metadata. File_Decompression_Technique: zip archive Transfer_Size: 2.84 Mb Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2008/1146/data/bathy/geotifs/geo/h11044n_mb10m_geo.zip Network_Resource_Name: http://pubs.usgs.gov/of/2008/1146/html/catalog.html 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. Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Metadata_Reference_Information: Metadata_Date: 20080930 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 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