U.S. Geological Survey 2006 1.0 raster digital data Open-File Report 2005-1145 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20051145 https://pubs.usgs.gov/of/2005/1145/data/bathy/grids/usgsgrids/h11044_bathy5.zip L.J. Poppe S.D. Ackerman E.F. Doran A.L. Beaver J.M. Crocker P.T. Schattgen 2006 1.0 Open-File Report 2005-1145 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2005/1145/ The U.S. Geological Survey, in cooperation with the National Oceanic and Atmospheric Administration and the Connecticut Department of Environmental Protection, has produced detailed geologic maps of the sea floor in Long Island Sound, a major East Coast estuary surrounded by the most densely populated region of the United States. These studies have built upon cooperative research with the State of Connecticut that was initiated in 1982. The current phase of this research program is directed toward studies of sea-floor sediment distribution, processes that control sediment distribution, nearshore environmental concerns, and the relation of benthic community structures to the sea-floor geology. The bathymetry data in this data set were collected during 2001 for charting applications as part of NOAA project OPR-B340-RU, survey H11044 aboard the NOAA Ship RUDE. The RUDE, which supports NOAA's east-coast nautical charting mission, is outfitted to acquire single-beam bathymetry with an Odom Echotrac DF-3200 duel frequency echosounder and shallow water multibeam bathymetry with a Reson 8125 system. The Reson multibeam system operates at 455 KHz with a 120 degree across track swath and 240 beams along its swath. To release the 5-m interpolated and regridded bathymetry generated from NOAA survey H11044 in Long Island Sound off Milford, Connecticut. 2005 publication date Complete None planned -73.128120 -72.936650 41.141151 41.023334 USGS Metadata Identifier USGS:5eacd18a-0f39-4bb7-9bce-a8e04d2490b4 None U.S. Geological Survey USGS National Oceanic and Atmospheric Administration NOAA Connecticut Department of Environmental Protection CT DEP Woods Hole Science Center NOAA Ship RUDE grid interpotated bathymetry UTM ArcGIS Survey H11044 Coastal and Marine Geology Program CMGP WHSC depth ISO 19115 Topic Category oceans geoscientificInformation elevation imageryBaseMapsEarthCover USGS Thesaurus bathymetry sea-floor characteristics multibeam sonar marine geophysics geospatial datasets None North America United States Atlantic Ocean Connecticut Branford Long Island Sound Branford Reef Townshend Ledge U.S. East Coast None Data are not for navigation purposes. Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the U.S.Geological Survey (USGS) as the sources of this information. U.S. Geological Survey Larry Poppe Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2314 508-457-2310 lpoppe@usgs.gov https://pubs.usgs.gov/of/2005/1145/graphics/browse_graphics/h11044_bathy5.jpg Image showing overview of the 5-m interpolated grid of NOAA survey H11044 JPEG Please acknowledge NOAA and the NOAA Ship RUDE as the originators of the data from which this data set was derived. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 K.Y. McMullen L.J. Poppe V.F. Paskevich E.F. Doran M.S. Moser E.B. Christman A.L. Beaver 2005 1.0 Open-File report 2005-1018 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2005/1018/ Information unavailable from original metadata. All collected data were processed and used to produce the interpolated and gridded dataset. Navigation was by differential GPS Information unavailable from original metadata. Assumed NOAA. Unpublished Material 1 DVD-ROM 2003 ground condition h11044_1_5m_decimal_degrees_xyz.txt Original processed shallow-water multibeam and single beam bathymetric data with no interpolation. Areas of no data exist between many of the ship's tracks. The multibeam data for this survey was acquired in XTF (extended Triton data format) and recorded digitally through an ISIS data acquisition system. Once digitally recorded, the XTF data were processed using CARIS HIPS/SIPS software to quality control the data and to incorporate sound velocity and tidal corrections. Data were gridded to 1.5 m; vertical datum is mean lower low water. 2002 h11044_1_5m_decimal_degrees_xyz.txt Atlantic Hydrographic Branch, NOAA mailing address

439 West York Street

Norfolk VA 23510 USA unknown The original multibeam data sets, which are in ASCII comma-delimited text, do not entirely cover the sea floor because line spacing during acquisition was such that areas of no data often are present between the ship's tracks. Therefore, further processing was conducted at the USGS's Woods Hole Science Center to provide bathymetric datasets with more continuous coverage. First, all non-standardized records were assumed to be bad records and were removed. Subsequently, the PROJ.4 cartographic projections library was used to project the data, the SwathEd software produced by the Ocean Mapping Group at the University of New Brunswick was used to create the grids from the actual sounding data, and GMT (the Generic Mapping Tools) was used to create a 3-m interpolated grid of the bathymetry. Interpolation was achieved during GMT processing by running the data through a block median filter and using a surface generating algorithm with a tension of 0.5. Other parameters were set at default. The grid was projected into Universal Transverse Mercator, Zone 18N. h11044_1_5m_decimal_degrees_xyz.txt 2005 h11044_bathy5 U.S. Geological Survey Seth Ackerman Computer Specialist mailing address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2315 508-457-2310 sackerman@usgs.gov Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Added the place keyword thesaurus for the place keywords. Added ISO 19115 Topic Category keywords. Added a distributor. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. Added the online link to the zipped data file in the distribution section. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 20170210 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov USGS Thesaurus keywords added to the keyword section. 20180720 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Crossref DOI link was added as the first link in the metadata. 20191118 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20200908 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Raster Grid Cell 2546 3161 1 Universal Transverse Mercator 18 0.999600 -75.000000 0.000000 500000.000000 0.000000 row and column 5.000000 5.000000 meters D_WGS_1984 WGS_1984 6378137.000000 298.257224 U.S. Geological Survey mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 508-548-8700 Downloadable Data: 5-m interpolated gridded bathymetry from NOAA survey H11044 Although this data set has been used by the USGS and NOAA, no warranty, expressed or implied, is made by the USGS or NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS or NOAA in the use of these data or related materials. AIG Information unavailable from original metadata. Raster One file (h11044_bathy5.zip) containing the Arc Info grid file components WinZip 32.545 https://pubs.usgs.gov/of/2005/1145/data/bathy/grids/usgsgrids/h11044_bathy5.zip https://pubs.usgs.gov/of/2005/1145/ DVD UDF None The user must have a program similar to ArcGIS that is capable of reading and processing the data files. 2005 20211116 U.S. Geological Survey Larry Poppe Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2314 508-457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None