National Oceanic and Atmospheric Administration U.S. Geological Survey 2011 1.0 raster digital data Open-File Report 2011-1003 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20111003 https://pubs.usgs.gov/of/2011/1003/html/catalog.html https://pubs.usgs.gov/of/2011/1003/data/bathy/grids/utm/eliscomb_utm.zip L.J. Poppe W.W. Danforth K.Y. McMullen C.E. Parker E.F. Doran 2011 1.0 Open-File Report 2011-1003 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2011/1003/ The USGS, in cooperation with NOAA and the Connecticut DEP, is producing detailed maps of the seafloor in Long Island Sound. The current phase of this cooperative research program is directed toward analyzing how bathymetric relief relates to the distribution of sedimentary environments and benthic communities. As part of this program, digital terrain models (DTMs) from bathymetry collected as part of NOAA's hydrographic charting activities are converted into ESRI raster grids and imagery (primarily of 2-m resolution), verified with bottom sampling and photography, and used to produce interpretations of seabed geology and hydrodynamic processes. Although each of the 18 completed surveys, ranging in area from 12 to 293 square kilometers, individually provides important benthic environmental information, many applications require a geographically broader perspective. For example, the usefulness of individual surveys is limited for the planning and construction of cross-Sound infrastructure, such as cables and pipelines, or for the testing of regional circulation models. To address this need, we integrated 12 multibeam and 2 LIDAR (Light Detection and Ranging) contiguous bathymetric DTMs into one dataset that covers much of eastern Long Island Sound. The new dataset is adjusted to mean lower low water, is provided in UTM Zone 18 NAD83 and geographic WGS84 projections, and is gridded to 4-m resolution. This resolution is adequate for seafloor-feature and process interpretation, but small enough to be queried and manipulated with standard GIS programs and to allow for future growth. Natural features visible in the grid include exposed bedrock outcrops, boulder lag deposits of submerged moraines, sand-wave fields, and scour depressions that reflect the strength of the oscillating tidal currents. Bedform asymmetry allows interpretations of net sediment transport. Anthropogenic artifacts visible in the bathymetric data include a dredged channel, shipwrecks, dredge spoils, mooring anchors, prop-scour depressions, buried cables, and bridge footings. Together the merged data reveal a larger, more continuous perspective of bathymetric topography than previously available, providing a fundamental framework for research and resource management activities in this major east-coast estuary. To release a 4-m grid of the combined multibeam and LIDAR bathymetry generated from NOAA surveys H11224, H11225, H11250, H11251, H11252, H11361, H11441, H11442, H11445, H11446, H11997, H11999, H12012, and H12013 offshore in eastern Long Island Sound and westernmost Block Island Sound in UTM Zone 18, NAD83. 20031006 20090517 ground condition (See the source citation in the lineage section for individual component's specific dates.) Complete None planned -72.666572 -71.975125 41.391500 41.079369 USGS Metadata Identifier USGS:4c696488-0815-443c-b445-4e16346b56ae None U.S. Geological Survey USGS Woods Hole Coastal and Marine Science Center multibeam bathymetry LIDAR Coastal and Marine Geology Program CMGP WHCMSC RESON 8101 NOAA survey H11441 H11441 National Oceanic and Atmospheric Administration NOAA grid Open-File Report 2011-1003 ArcRaster grid OFR 2011-1003 RESON 8125 NOAA survey H11224 H11224 bathymetry Connecticut Department of Environmental Protection CT DEP NOAA survey H11442 H11442 NOAA survey H11225 H11225 NOAA survey H11250 NOAA survey H11251 NOAA survey H11252 NOAA survey H11361 NOAA survey H11445 NOAA survey H11446 NOAA survey H11997 NOAA survey H11999 NOAA survey H12012 NOAA survey H12013 H11250 H11251 H11252 H11361 H11445 H11446 H11997 H11999 H12012 H12013 MBES Simrad EM1002 RESON 7125 ISO 19115 Topic Category elevation oceans USGS Thesaurus bathymetry topography sea-floor characteristics multibeam sonar lidar marine geophysics geospatial datasets None Connecticut New London U.S. East Coast United States North America Atlantic Ocean Fishers Island Groton Long Island Sound Avery Point Fishers Island Sound Niantic Niantic Bay Black Point Giants neck Twotree Island The Race Orient Point Plum Island Rocky Point Six Mile Reef Long Sand Shoal Connecticut River Old Saybrook None 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. U.S. Geological Survey Larry Poppe Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA (508) 548-8700 x2314 (508) 457-2310 lpoppe@usgs.gov https://pubs.usgs.gov/of/2011/1003/data/bathy/grids/utm/eliscomb_utm.gif Thumbnail image showing the combined 4-m gridded multibeam and LIDAR bathymetry collected during NOAA surveys H11224, H11225, H11250, H11251, H11252, H11361, H11441, H11442, H11445, H11446, H11997, H11999, H12012, and H12013 offshore in eastern Long Island Sound and westernmost Block Island Sound in UTM Zone 18, NAD83 GIF Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500 Emily B. Christman 2005 1.0 document Descriptive Report H11441 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11441/DR/H11441.pdf Darren Stephenson 2004 1.0 document Descriptive Report H11224 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11224/DR/H11224.pdf Poppe, L.J. Ackerman, S.D. Doran, E.F. Beaver, A.J. Crocker, J.M. Schattgen, P.T. 2006 1.0 Open-File Report 2005-1145 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2005/1145/ Emily B. Christman 2005 1.0 document Descriptive Report H11442 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11442/DR/H11442.pdf Darren Stephenson 2004 1.0 document Descriptive Report H11225 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11225/DR/H11225.pdf Donald W. Haines 2003 1.0 document Descriptive Report H11250 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11250/DR/H11250.pdf P. Tod Schattgen 2008 1.0 document Descriptive Report H11251 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11251/DR/H11251.pdf Emily B. Christman 2004 1.0 document Descriptive Report H11252 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11252/DR/H11252.pdf Emily B. Christman 2004 1.0 document Descriptive Report H11361 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11361/DR/H11361.pdf P. Tod Schattgen 2008 1.0 document Descriptive Report H11445 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11445/DR/H11445.pdf P. Tod Schattgen 2008 1.0 document Descriptive Report H11446 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11446/DR/H11446.pdf P. Tod Schattgen 2008 1.0 document Descriptive Report H11997 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11997/DR/H11997.pdf P. Tod Schattgen 2008 1.0 document Descriptive Report H11999 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11999/DR/H11999.pdf P. Tod Schattgen 2009 1.0 document Descriptive Report H12012 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H12001-H14000/H12012/DR/H12012.pdf P. Tod Schattgen 2009 1.0 document Descriptive Report H12013 Atlantic Hydrographic Branch, Norfolk, VA National Ocean Survey, National Oceanic and Atmospheric Administration http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H12001-H14000/H12013/DR/H12013.pdf Poppe, L.J. Danforth, W.W. McMullen, K.Y. Parker, C.E. Lewit, P.G. Doran, E.F. 2010 1.0 GIS data report Open-File Report 2009-1231 Reston, VA U.S. Geological Survey 1 CD-ROM https://pubs.usgs.gov/of/2009/1231/ No additional checks for consistency were performed on this data. All collected data were processed and used to produce this dataset. Horizontal position of the launches acquiring multibeam bathymetry were determined using GPS corrected by U.S. Coast Guard differential GPS beacon stations at Moriches, NY, Sandy Hook, NJ, and Acushnet, MA. Real-time positioning during LIDAR acquisition was obtained by an Ashtech GG24 GPS receiver combined with Thales GeoSolutions Wide Area DGPS. Original horizontal resolution of the MBES data was 0.5 - 2 m; original cell size of the gridded LIDAR data was primarily 4 m. The final CARIS combined base surfaces for the MBES data were produced at a 2-m cell size; final cell size of the gridded LIDAR data was 4 m. Attitude of the launches (e.g. pitch, roll, and heave) acquiring multibeam bathymetry were monitored by an Applanix TSS POS/MV 320 Version 3 GPS aided navigation system. Real-time positioning during LIDAR acquisition was obtained by an Ashtech GG24 GPS receiver combined with Thales GeoSolutions Wide Area DGPS. Ashtech Z12 GPS receivers, provided as part of the Airborne System and Ground Systems, also logged GPS data on the aircraft and at a locally established base station to provide post processed KGPS position solutions. Received infrared laser energy, supplemented by an Altitude Heading Reference System (AHRS) inertial height reference and kinematic GPS, determined the height of the aircraft. Verified water levels are based on NWLON stations 8461490, New London, CT and 8465705, New Haven, CT. The vertical resolution of the multibeam data is approximately 0.5% of the water depth. Emily B. Christman Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20050427 20050522 ground condition H11441 bathymetry Original processed multibeam bathymetric data. Darren Stephenson Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20040120 20040305 ground condition H11224 bathymetry Original processed LIDAR bathymetric data. Emily B. Christman Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20050418 20050506 ground condition H11442 bathymetry Original processed multibeam bathymetric data. Darren Stephenson Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20040120 20040305 ground condition H11225 bathymetry Original processed LIDAR bathymetric data. Donald W. Haines Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20031006 20031101 ground condition H11250 bathymetry Original processed multibeam bathymetric data. P. Tod Schattgen Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20081007 20081027 ground condition H11251 Original processed multibeam bathymetric data. Emily B. Christman Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20041024 20041115 ground condition H11252 Original processed multibeam bathymetric data. Emily B. Christman Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20041011 20041115 ground condition H11361 Original processed multibeam bathymetric data. P. Tod Schattgen Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20080916 20081001 ground condition H11445 Original processed multibeam bathymetric data. P. Tod Schattgen Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20080728 20081021 ground condition H11446 Original processed multibeam bathymetric data. P. Tod Schattgen Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20080915 20081029 ground condition H11997 Original processed multibeam bathymetric data. P. Tod Schattgen Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20081002 20081029 ground condition H11999 Original processed multibeam bathymetric data. P. Tod Schattgen Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20090418 20090430 ground condition H12012 Original processed multibeam bathymetric data. P. Tod Schattgen Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Unpublished Material raster digital data computer hard drive 20090419 20090517 ground condition H12013 Original processed multibeam bathymetric data. The NOAA Ship Thomas Jefferson, and two 8.5-m aluminum Jensen launches deployed from the ship, were used to acquire the multibeam echosounder (MBES) bathymetric data between October 2003 and May 2009 for surveys H11250, H11251, H11252, H11361, H11441, H11442 H11445, H11446, H11997, H11999, H12012, and H12013. Aboard the launches, the 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. Aboard the Thomas Jefferson, MBES data for surveys H11250, H11252, and H11361 were collected with a SIMRAD EM1002 system; later surveys were collected with a RESON 7125 system. Original horizontal resolution of the MBES data was 0.5 to 2 m, depending on survey and water depth; 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. Navigation was by TSS POS/MV 320 differential GPS-assisted inertial navigation systems; the differential GPS beacons used were from Moriches, New York, and Sandy Hook, New Jersey. 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 four to six hours of MBES acquisition. Tidal zone corrections were calculated from data acquired from National Water Level Observation stations at New London, Connecticut, New Haven, Connecticut, and Montauk, New York. Vertical datum is mean lower low water. Individuals interested in detail descriptions of the MBES acquisition and processing should consult the descriptive reports. Eleven reconnaissance cruises were conducted aboard a leased lobster boat to monitor water clarity prior to commencement of airborne LIDAR operations of surveys H11224 and H11225. These cruises, which utilized Secchi disks to determine water clarity, were conducted between the Connecticut River and Fishers Island during May 9, 2003 and January 11, 2004, when water clarity was deemed adequate. The LIDAR (light detection and ranging) data were acquired by Tenix LADS, Inc. during January 25 - March 3, 2004 with a LADS Mk II system. Airborne survey operations were conducted aboard a Dash 8-202 series aircraft with a Nd:YAG laser at heights between 1,200 and 2,200 feet, at ground speeds between 140 and 210 knots, and at 4x4 and 3x3-m laser-spot spacings. Green laser pulses were scanned beneath the aircraft in a rectilinear pattern. The returned green-laser energy reflected from the sea surface and seafloor were captured and digitally recorded. Received infrared laser energy, supplemented by an Altitude Heading Reference System (AHRS) inertial height reference and kinematic GPS, determined the height of the aircraft. Real-time positioning was provided by WADGPS (wide area differential global positioning system). Acquired data were processed with CARIS HIPS. Individuals interested in detail descriptions of the MBES and LIDAR acquisition and processing should consult the descriptive reports. Vertical datum is mean lower low water; X and Y units are meters; UTM Zone 18, NAD83. Unknown H11224 CARIS HIPS database H11225 CARIS HIPS database H11441 CARIS HIPS database H11442 CARIS HIPS database H11250 CARIS HIPS database H11251 CARIS HIPS database H11252 CARIS HIPS database H11361 CARIS HIPS database H11445 CARIS HIPS database H11446 CARIS HIPS database H11997 CARIS HIPS database H11999 CARIS HIPS database H12012 CARIS HIPS database H12013 CARIS HIPS database National Oceanic and Atmospheric Administration Castle Eugene Parker Hydrographer mailing address

439 West York Street

Norfolk VA 23510 USA 757-441-6746 castle.e.parker@noaa.gov The field sheets from the surveys (average depths, not the shoal based field sheets) were read back into CARIS HIPS/SIPS software version 7.0. Using the Base Surface -> Combine command within HIPS, all of the source CARIS base surfaces were combined into a master BASE surface (eliscomb) having a 4 meter grid resolution. H11224 CARIS HIPS database H11225 CARIS HIPS database H11250 CARIS HIPS database H11251 CARIS HIPS database H11252 CARIS HIPS database H11361 CARIS HIPS database H11441 CARIS HIPS database H11442 CARIS HIPS database H11445 CARIS HIPS database H11446 CARIS HIPS database H11997 CARIS HIPS database H11999 CARIS HIPS database H12012 CARIS HIPS database H12013 CARIS HIPS database 2010 eliscomb.csar Bill Danforth U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2274 508-457-2310 bdanforth@usgs.gov The combined base surface was exported from CARIS as a Bathymetric Attributed Grid (BAG) file. See http://www.opennavsurf.org/papers/ons_fsd.pdf for a description of the BAG format. eliscomb.csar 2010 eliscomb.bag Bill Danforth U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2274 508-457-2310 bdanforth@usgs.gov The BAG surface was imported into Fledermaus v7.2 to make equivalent digital terrain model (DTM) files. The floating point format for each sounding depth point is preserved during data import. Additionally, the BAG surface was imported into Fledermaus as "gridded data", therefore re-gridding of data did not occur during the import process and thus preserved the original resolution of the CARIS base surface. The DTM was then exported as an ESRI ASCII raster file. eliscomb.bag 2010 eliscomb.asc Bill Danforth U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2274 508-457-2310 bdanforth@usgs.gov The ESRI ASCII raster file was then converted into raster within ArcToolbox v9.3 using the ASCII to Raster conversion tool. eliscomb.asc 2010 eliscomb_utm Bill Danforth U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2274 508-457-2310 bdanforth@usgs.gov Edits to the metadata were made to fix any errors that MP v 2.9.46 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.). Fixed the link to the data in the identification section. Reordered the links in the identification section so a landing page link is first. Added the source citation abbreviation and used the title for the value. Attempted to modify http to https where appropriate. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. 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. 20180516 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 8233 14248 1 Universal Transverse Mercator 18 0.999600 -75.000000 0.000000 500000.000000 0.000000 row and column 4.000000 4.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Mean lower low water 0.1 meters Explicit depth coordinate included with horizontal coordinates A 4-m grid of the combined bathymetry data from NOAA surveys H11224, H11225, H11250, H11251, H11252, H11361, H11441, H11442, H11445, H11446, H11997, H11999, H12012, and H12013 offshore in eastern Long Island Sound and westernmost Block Island Sound in the UTM Zone 18, NAD83 coordinate system. U.S. Geological Survey U.S. Geological Survey Larry Poppe Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA (508) 548-8700 x2314 (508) 457-2310 lpoppe@usgs.gov Downloadable Data 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. AIG ArcGIS 9.3 ESRI ArcRaster Grid One file (eliscomb_utm.zip) containing the ArcGIS grid file components, browse graphic and metadata. zip archive 75.6 https://pubs.usgs.gov/of/2011/1003/data/bathy/grids/utm/eliscomb_utm.zip https://pubs.usgs.gov/of/2011/1003/html/catalog.html Data are downloadable via the World Wide Web (WWW). DVD-ROM 4.7 Gbytes UDF None 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. 2011 20211116 Larry Poppe U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 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