National Oceanic and Atmospheric Administration U.S. Geological Survey 2013 1.0 remote-sensing image Open-File Report 2012-1103 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20121103 http://pubs.usgs.gov/of/2012/1103/data/bathy/geotifs/utm_interp/h12013_int2m_utm18.zip http://pubs.usgs.gov/of/2012/1103/html/catalog.html L.J. Poppe K.Y. McMullen S.D. Ackerman M.R. Guberski D.A. Wood 2013 1.0 GIS data report Open-File Report 2012-1103 Reston, VA U.S. Geological Survey 1 DVD-ROM http://pubs.usgs.gov/of/2012/1103/ 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 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. 20090419 20090517 ground condition Complete None planned -72.345648 -72.236466 41.302827 41.227158 USGS Metadata Identifier USGS:54ec9723-13b3-46d1-b994-ac2ec6984673 None U.S. Geological Survey USGS Woods Hole Coastal and Marine Science Center multibeam bathymetry bathymetry Coastal and Marine Geology Program CMGP WHCMSC NOAA survey H12013 H12013 National Oceanic and Atmospheric Administration NOAA GeoTIFF Open-File Report 2012-1103 OFR 2012-1103 hill-shaded RESON 7125 Connecticut Department of Energy and Environmental Protection CT DEEP NOAA Ship Thomas Jefferson RESON 8125 ISO 19115 Topic Category oceans imageryBaseMapsEarthCover USGS Thesaurus sea-floor characteristics marine geophysics computational methods geospatial datasets multibeam sonar None Connecticut U.S. East Coast United States North America Atlantic Ocean Long Island Sound Connecticut River Old Lyme Old saybrook Lynde Point Griswold Point Long sand Shoal Hatchett Poinr Hatchett Reef 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 http://pubs.usgs.gov/of/2012/1103/data/bathy/geotifs/utm_interp/h12013_int2m_utm18.gif Thumbnail image of the GeoTIFF showing the interpolated color hill-shaded bathymetry collected during NOAA survey H12013 in UTM Zone 18, NAD83 GIF Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.1850 P. Tod Schattgen 2009 1.0 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. DiGiacomo-Cohen, M.L. Doran, E.F. Smith, S.M. Stewart, H.F. Forfinski, N.A. 2007 1.0 GIS data release Open-File Report 2007-1012 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/of/2007/1012/ Poppe, L.J. Denny, J.F. Williams, S.J. Moser, M.S. Forfinski, N.A. Stewart, H.F. Doran, E.F. 2007 1.0 GIS data release Open-File Report 2007-1191 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/of/2007/1191/ McMullen, K.Y. Poppe, L.J. Danforth, W.W. Blackwood, D.S. Schaer, J.D. Ostapenko, A.J. Glomb, K.A. Doran, E.F. 2010 1.0 GIS data release Open-File Report 2010-1005 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/of/2010/1005/ Poppe, L.J. McMullen, K.Y. Ackerman, D.S. Blackwood, D.S. Irwin, B.J. Schaer, J.D. Lewit, P.G. Doran, E.F. 2010 1.0 Open-File Report 2010-1007 Reston, VA U.S. Geological Survey 1 DVD-ROM http://pubs.usgs.gov/of/2010/1007/ McMullen, K.Y. Poppe, L.J. Danforth, W.W. Blackwood, D.S. Schaer, J.D. Guberski, M.R. Wood, D.A. Doran, E.F. 2011 1.0 Open-File Report 2010-1100 Reston, Va U.S. Geological Survey 1 DVD-ROM. http://pubs.usgs.gov/of/2010/1100/ L.J. Poppe K.Y. McMullen S.D. Ackerman D.S. Blackwood J.D. Schaer M.R. Forrest A.J. Ostapenko E.F. Doran 2011 1.0 GIS data report Open-File Report 2010-1150 Reston, Va U.S. Geological Survey 1 DVD-ROM http://pubs.usgs.gov/of/2010/1150/ McMullen, K.Y. Poppe, L.J. Danforth, W.W. Blackwood, D.S. Schaer, J.D. Glomb, K.A. Doran, E.F. 2012 1.0 GIS data report Open-File Report 2011-1149 Reston, VA U.S. Geological Survey 1 DVD-ROM http://pubs.usgs.gov/of/2011/1149/ No additional checks for consistency were performed on this data. All collected data were processed and used to produce this dataset. 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. 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. National Ocean Survey, National Oceanic and Atmospheric Administration Unpublished Material disc 20090419 20090517 ground condition Information unavailable from original metadata. Original processed multibeam bathymetric data. 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. 2009 H12013 CARIS HIPS database National Oceanic and Atmospheric Administration Jasper Schaer Field Operations Officer mailing address

439 West York Street

Norfolk VA 23510 USA 757-441-6746 jasper.schaer@noaa.gov 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) H12013 CARIS HIPS database 2012 10m_combined_Interp.bag Seth Ackerman U.S. Geological Survey GIS Specialist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2315 508-457-2310 sackerman@usgs.gov 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) 10m_combined_Interp.bag 2012 10m_combined_Interp.sd H12013_2m_combined.asc H12013_2m_combined.asc H12013_2m_combined.dtm 10m_combined_Interp.dtm Seth Ackerman U.S. Geological Survey GIS Specialist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 508-548-8700 x2315 508-457-2310 sackerman@usgs.gov 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. H12013_2m_combined.dtm 10m_combined_Interp.dtm 2012 outtemp67.dtm outtemp67.sd Seth Ackerman U.S. Geological Survey GIS Specialist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 508-548-8700 x2315 508-457-2314 sackerman@usgs.gov 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. outtemp67.sd 2012 h12013_int2m_utm18.tif Seth Ackerman U.S. Geological Survey GIS Specialist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 508-548-8700 x2315 508-457-2310 sackerman@usgs.gov 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. h12013_int2m_utm18.tif 2012 h12013_int2m_utm18.tfw Seth Ackerman U.S. Geological Survey GIS Specialist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 508-548-8700 x2315 508-457-2310 sackerman@usgs.gov 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. h12013_int2m_utm18.tif h12013_int2m_utm18.tfw 2012 h12013_int2m_utm18.tif h12013_int2m_utm18.tfw Seth Ackerman U.S. Geological Survey GIS Specialist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 508-548-8700 x2315 508-457-2310 sackerman@usgs.gov Edits to the metadata were made to fix any errors that MP v 2.9.32 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.). 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. 20160408 U.S. Geological Survey VeeAnn A. Cross Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543 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 Pixel 4065 4450 1 Universal Transverse Mercator 18 0.999600 -75.000000 0.000000 500000.000000 0.000000 row and column 2.000450 2.000492 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 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. 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 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. GeoTIFF Information unavailable from original metadata. TIFF One file (h12013_int2m_utm18.zip) containing the GeoTIFF, world file, browse graphic and metadata. zip archive 15.39 http://pubs.usgs.gov/of/2012/1103/data/bathy/geotifs/utm_interp/h12013_int2m_utm18.zip http://pubs.usgs.gov/of/2012/1103/html/catalog.html Data are downloadable via the World Wide Web (WWW). DVD-ROM 4.75 Gbytes UDF None 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. 2013 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