U.S. Geological Survey 2010 1.0 raster digital data Open-File Report 2010-1006 Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20101006 http://pubs.usgs.gov/of/2010/1006/GIS/raster/bathymetry/ccb_fill_hs.zip http://pubs.usgs.gov/of/2010/1006/html/appendix1.html Brian D. Andrews Seth D. Ackerman Wayne E. Baldwin Walter A. Barnhardt 2010 1.0 Open-File Report 2010-1006 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/of/2010/1006/ These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHCMSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters of coastal Massachusetts, primarily in water depths of 3-30 meters deep. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html). The data collected in the study area located in Northern Cape Cod Bay Massachusetts includes high-resolution geophysics (bathymetry, backscatter intensity, and seismic reflection), and ground validation (sediment samples, video tracklines, and bottom photographs). The data were collected during five separate surveys conducted between 2006 and 2008 and cover 480 square kilometers of the inner continental shelf. More information about the individual USGS surveys conducted as part of the northern Cape Cod Bay project can be found on the Woods Hole Coastal and Marine Science Center Field Activity webpage: 06012: http://quashnet.er.usgs.gov/data/2006/06012/ 07001: http://quashnet.er.usgs.gov/data/2007/07001/ 07002: http://quashnet.er.usgs.gov/data/2007/07002/ 07003: http://quashnet.er.usgs.gov/data/2007/07003/ 08002: http://quashnet.er.usgs.gov/data/2008/08002/ The purpose of this ArcRaster grid is to show grayscale hillshaded bathymetry that includes the four surveys (06012, 07001, 07002, 08002) where bathymetry was collected by the USGS in the Cape Cod Bay survey area at 5 meter resolution for regional analysis. 20060816 20080507 ground condition of four separate date ranges - 20060816 to 20060823; 20070429 to 20070503; 20070725 to 20070807; 20080429 to 20080507 Complete None planned -70.644046 -70.154440 42.094617 41.930583 USGS Metadata Identifier USGS:93d18ddf-aa21-4c8b-ac04-191fd8398e24 None U.S. Geological Survey USGS Coastal and Marine Geology Program CMGP Woods Hole Coastal and Marine Science Center WHCMSC Bathymetry Seafloor Marine Geology Swath Bathymetry Interferometric Sonar SWATHplus ArcGIS Raster hillshade shaded relief field activity serial number 06012 field activity serial number 07001 field activity serial number 07002 field activity serial number 08002 field activity number 2006-012-FA field activity number 2007-001-FA field activity number 2007-002-FA field activity number 2008-002-FA R/V Rafael R/V Megan T. Miller ISO 19115 Topic Category oceans geoscientificInformation location imageryBaseMapsEarthCover USGS Thesaurus sea-floor characteristics marine geophysics computational methods geospatial datasets interferometric sonar None North America United States Atlantic Ocean Gulf of Maine Cape Cod Bay Massachusetts Bay Duxbury Provincetown None Seafloor sea floor None 2006 2007 2008 None These data are not for navigational use. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Brian Andrews U.S. Geological Survey Geographer mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA 508-548-8700 x2348 508-457-2310 bandrews@usgs.gov http://pubs.usgs.gov/of/2010/1006/GIS/browse_jpg/CCB_fill_hs.jpg gray scale thumbnail image of hillshaded bathymetry collected in the Cape Cod Bay Massachusetts survey area. JPEG Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.1850 Information unavailable from original metadata. This hillshade grid does not include all bathymetric data collected in the northern Cape Cod Bay survey area. Data collected along transit lines, east-west seismic tie lines and other lines of poor quality were excluded from this grid. The "Mosaic" attribute in the CCB_BathTracklines shapefile published in this report identifies the 524 lines that were included, and the 60 lines that were not included, in this grid. Field activity 06012: The SWATHplus transducers were mounted on a rigid pole, approximately 2.6 m below the water line, along the starboard side of the R/V Megan T. Miller. Position data were provided by an Ashtech Z-Surveyor Extreme for real-time kinematic (RTK) navigation (an Ashtech BR2G Differential Global Positioning System (DGPS) was used as a backup navigation system) and recorded to the raw data files (SXR) via Swath Processor (version 2.07) acquisition software. During some portions of the survey, technical difficulties caused the GPS systems to malfunction and lose the "fixed" RTK signal. When this occurred, the navigation system defaulted to a "float" RTK, and then to a GPS (stand alone) signal, after which the navigation signal was lost completely. Surveying was halted until a reliable GPS signal was restored. A conservative estimate of positional accuracy is +/- 2 meters, but when the navigation system was providing the "fixed" RTK signal, positional accuracy is <1 m. Field activities 07001, 07002, and 08002: The SWATHplus transducers were mounted on a rigid pole from the bow of the R/V Rafael, approximately 0.5 m below the water line during surveys 07001 and 08001, and 2.6 m below the water line on the starboard side for survey 07002. Position data were recorded by Hypack software to Hypack raw files using an Ashtech Z-Surveyor Extreme for real-time kinematic (RTK) navigation, and an Ashtech BR2G for Differential Global Positioning System (DGPS) navigation. DGPS navigation from the primary F180 antenna was recorded to the raw sonar data files (SXR) via SWATHplus acquisition software. A conservative estimate of positional accuracy is +/- 2 meters. Based on SWATHplus interferometric sonar system specifications, vertical accuracy of the raw data may approximate 1% of water depth, which translates to 0.1 0.6 meters within the northern Cape Cod Bay survey area. RTK-GPS was used to establish water-level heights relative to Mean Lower Low Water (MLLW), providing decimeter-scale accuracies. Tide-correction was done in post-processing (see process steps). Refraction artifacts were minimized by acquiring a range of sound velocity profiles throughout the survey area to model the sound velocity structure of the water column. Changes in vessel draft due to fuel and water usage were not considered. Information unavailable from original metadata. Assumed to be USGS. unknown This file had a source contribution, but no other source information. This information had to be modified to meet the standard. Information unavailable from original metadata. 20060816 20080507 Information unavailable from original metadata, but assumed to be the same as the time period of content. Ground condition of four separate date ranges - 20060816 to 20060823; 20070429 to 20070503; 20070725 to 20070807; 20080429 to 20080507. Information unavailable from original metadata. Sonar Configuration: Bathymetry data were acquired using a Systems Engineering and Assessment Ltd. (SEA) SWATHplus interferometric sonar operating at 234 kHz (06012, 07001, 08002) or 117 kHz (07002). Survey lines were run at an average speed of 5 knots and were spaced 75-200 m apart to obtain overlapping swaths of data and full coverage of the seafloor. During USGS field activities 06012 and 07002, the SWATHplus transducers were mounted on a rigid pole on the starboard side of the R/V Megan Miller, about 2.6 m below the waterline. During 06012, a TSS DMS 2-05 motion reference unit was mounted directly above the sonar transducers and continuously recorded and sent vertical displacement (heave) and attitude (pitch and roll) of the vessel during acquisition to the SWATHplus software. During 06012 vessel heading was determined by a KVH compass that was corrected for magnetic variation of +15.583 degrees (from NOAA Chart number13246 36th ed., Mar. 10/01) during post processing. During 07002, a Coda Octopus F180 inertial-motion unit, mounted directly above the transducers, measured true heading, vertical displacement (heave) and attitude (pitch and roll) of the vessel during acquisition. Field activities 07001 and 08002: the SWATHplus transducers were mounted on a rigid pole on the bow of the R/V Rafael, about 0.5 m below the waterline. A Coda Octopus F180 inertial-motion unit, mounted directly above the transducers, measured true heading, vertical displacement (heave) and attitude (pitch and roll) of the vessel during acquisition. Navigation: Field activity 06012: Real-Time Kinematic (RTK) GPS navigation was used to determine the horizontal and vertical position (xyz) of the GPS antenna mounted directly above the SWATHplus transducers with sub-meter accuracy. The RTK-corrected coordinates were transmitted to the ship from a land-based RTK-GPS station established by the USGS at NOAA Tidal Station #8446009 in Brant Rock Harbor, MA. Field activities 07001, 07002, and 08002: Differential GPS (DGPS) navigation was used to determine the horizontal position (x,y) of the GPS antenna mounted directly above and forward (F180R primary antenna, 0.5 meters) of the SWATHplus transducers with +/- 1-2 meter accuracy. RTK-GPS was used to determine the vertical position of the Ashtech GPS antenna (z) with sub-meter accuracy. Vertical coordinates for all four surveys were referenced to Mean Lower Low Water (MLLW) using the offset between the North American Vertical Datum of 1988 (NAVD 88) and MLLW published for the tidal benchmark. Horizontal (x and y) and vertical (z) offsets between the transducers, motion sensor, and GPS antenna were precisely measured and recorded within the SWATHplus acquisition software (SEA Swath Processor (2005)), which established the motion sensor as the common reference point during data acquisition. Speed of Sound: Sound-velocity profiles were collected approximately every 2 hours by a hand-casted Applied MicroSystems SV Plus sound velocimeter. The depth of the transducers below the sea surface was measured and recorded within the SWATHplus acquisition software, and used as a reference point for deriving the acoustic ray path based on sound velocity profiles. Tides: During post-processing, soundings were referenced to local MLLW by using orthometric to chart datum offsets obtained from NOAA Tidal Station #8446009 at Brant Rock Harbor, Massachusetts. Data were processed and gridded by using the SEA SWATHplus Swath Processor (version 10.0) CARIS Hydrographic Information Processing System (HIPS version 6.1). Calculate bathymetric hillshade: Calculated bathymetric hillshade (ccb_fill_hs) using the "Hillshade" tool in Spatial Analyst Tools (ArcGIS ArcToolbox ver. 9.3) with following parameters: Input raster: ccb_bath_f Azimuth: 335 Altitude: 45 Model Shadows: NO_SHADOWS Z factor (vertical exaggeration): 1 ccb_bath_f (This publication) 200912 Brian Andrews U.S. Geological Survey Geographer mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA 508-548-8700 x2348 508-457-2310 bandrews@usgs.gov Edits to the metadata were made to fix any errors that MP v 2.9.30 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 format of the time period of content and some process dates had to be fixed. This file had a source contribution, but no other source information. This information had to be modified to meet the standard. 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. 20151120 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 Grid Cell 3512 8053 1 Universal Transverse Mercator 19 0.999600 -69.000000 0.000000 500000.000000 0.000000 row and column 5.000000 5.000000 meters D_WGS_1984 WGS_1984 6378137.000000 298.257224 ccb_fill_hs.vat Value Attribute Table- Internal Feature Number ESRI Rowid internal feature number ESRI Sequential unique whole numbers that are automatically generated. VALUE 8-bit gray scale value ESRI 94 241 COUNT number of cells within the grid that are assigned a specific 'VALUE' (8-bit gray scale values) ESRI 1 5,478,458 Brian Andrews U.S. Geological Survey Geographer mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543 USA 508-548-8700 x2348 bandrews@usgs.gov Downloadable Data Neither the U.S. Government, the Department of the Interior, nor the USGS, 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 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 Raster GRID format WinZip file containing the ArcRaster grid of gray scale bathymetric hillshade of data collected in Cape Cod Bay, Massachusetts survey area. WinZip 7.7 http://pubs.usgs.gov/of/2010/1006/GIS/raster/bathymetry/ccb_fill_hs.zip DVD-ROM 4.75 Gbytes UDF None These data are available as a ArcInfo 8-bit floating point binary grid in Environmental Systems Research Institute (ESRI) format. The grid consists of two folders, one with the "grid name", and one "info" folder. The two folders for each grid are compressed into one file using WinZip (ver. 9.0) software. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an ESRI ArcRaster grid. The two folders for each grid must be uncompressed to the same folder. If during the process of extracting multiple grids in WinZip format to the same folder, the user is prompted by WinZip software to "overwrite existing files" in the info folder select the "yes" option. 20240318 Brian Andrews U.S. Geological Survey Geographer mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA 508-548-8700 x2348 508-457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time