Metadata: Identification_Information: Citation: Citation_Information: Originator: National Oceanic and Atmospheric Administration Originator: U.S. Geological Survey Publication_Date: 2010 Title: Color Shaded-Relief GeoTIFF Image Showing the Combined 4-m Multibeam and LIDAR Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Surveys H11442 and H11225 Offshore of Niantic, CT (NIANTIC_MBLIDAR_GEO.TIF, Geographic, WGS84) Edition: 1.0 Geospatial_Data_Presentation_Form: remote-sensing image Series_Information: Series_Name: Open-File Report Issue_Identification: 2009-1231 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://doi.org/10.3133/ofr20091231 Online_Linkage: http://pubs.usgs.gov/of/2009/1231/data/bathy/geotifs/niantic/niantic_mblidar_geo.zip Online_Linkage: http://pubs.usgs.gov/of/2009/1231/data/bathy/geotifs/niantic/ Online_Linkage: http://pubs.usgs.gov/of/2009/1231/html/catalog.html Larger_Work_Citation: Citation_Information: Originator: L.J. Poppe Originator: W.W. Danforth Originator: K.Y. McMullen Originator: C.E. Parker Originator: P.G. Lewit Originator: E.F. Doran Publication_Date: 2010 Title: Integrated Multibeam and LIDAR Bathymetry Data Offshore of New London and Niantic, Connecticut Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2009-1231 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: 1 CD-ROM Online_Linkage: http://pubs.usgs.gov/of/2009/1231/ Description: Abstract: Nearshore areas within Long Island Sound are of great interest to the Connecticut and New York research and management communities because of their ecological, recreational, and commercial importance. However, although advances in multibeam echosounder technology permit the construction of detailed digital terrain models of seafloor topography within deeper waters, limitations inherent with collecting multibeam data make using this technology in shallower waters (<10-m deep) more difficult and expensive. These limitations have often resulted in gaps of no data between multibeam bathymetric datasets and the adjacent shoreline. To address this problem, complete-coverage multibeam bathymetry acquired offshore of New London and Niantic Bay, Connecticut, has been integrated with hydrographic LIDAR acquired along the nearshore. The result is a more continuous seafloor perspective and a much smaller gap between the digital bathymetric data and the shoreline. These datasets are provided as ESRI grid and GeoTIFF formats in order to facilitate access, compatibility, and utility. Purpose: To release a color shaded-relief GeoTIFF of the 4-m combined multibeam and LIDAR bathymetry generated from NOAA surveys H11441 and H11224 offshore of New London, Connecticut in geographic, WGS84 coordinates. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20040120 Ending_Date: 20050506 Currentness_Reference: ground condition (See the source citation in the lineage section for individual component's specific dates.) Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -72.250977 East_Bounding_Coordinate: -72.094949 North_Bounding_Coordinate: 41.329324 South_Bounding_Coordinate: 41.251997 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:f45a3f91-2575-429e-8b37-322ec339cce8 Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: USGS Woods Hole Coastal and Marine Science Center Theme_Keyword: multibeam bathymetry Theme_Keyword: LIDAR Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: WHCMSC Theme_Keyword: NOAA survey H11442 Theme_Keyword: NOAA survey H11225 Theme_Keyword: National Oceanic and Atmospheric Administration Theme_Keyword: NOAA Theme_Keyword: GeoTIFF Theme_Keyword: Open-File Report 2009-1231 Theme_Keyword: OFR 2009-1231 Theme_Keyword: RESON 8125 Theme_Keyword: RESON 8101 Theme_Keyword: hill-shaded Theme_Keyword: H11442 Theme_Keyword: H11225 Theme_Keyword: Connecticut Department of Environmental Protection Theme_Keyword: CT DEP Theme_Keyword: bathymetry Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme_Keyword: oceans Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: sea-floor characteristics Theme_Keyword: marine geophysics Theme_Keyword: computational methods Theme_Keyword: geospatial datasets Theme_Keyword: multibeam sonar Theme_Keyword: lidar Place: Place_Keyword_Thesaurus: None Place_Keyword: Connecticut Place_Keyword: Niantic Place_Keyword: U.S. East Coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Atlantic Ocean Place_Keyword: Niantic Bay Place_Keyword: Twotree Island Place_Keyword: Black Point Place_Keyword: Giants Neck Place_Keyword: Long Island Sound 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/2009/1231/data/bathy/geotifs/niantic/niantic_mblidar_geo.jpg Browse_Graphic_File_Description: Thumbnail image of the GeoTIFF showing the 4-m color hill-shaded combined multibeam and LIDAR bathymetry collected during NOAA surveys H11442 and H11225 in geographic, WGS84 Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500 Cross_Reference: Citation_Information: Originator: Emily B. Christman Publication_Date: 2005 Title: H11442 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11442 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11442/DR/H11442.pdf Cross_Reference: Citation_Information: Originator: Darren Stephenson Publication_Date: 2004 Title: H11225 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11225 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11225/DR/H11225.pdf Cross_Reference: Citation_Information: Originator: Poppe, L.J. Originator: Ackerman, S.D. Originator: Doran, E.F. Originator: Beaver, A.J. Originator: Crocker, J.M. Originator: Schattgen, P.T. Publication_Date: 2007 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: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2005/1145/ Cross_Reference: Citation_Information: Originator: Poppe, L.J. Originator: Lewis, R.S. Originator: Denny, J.F. Originator: Parolski, K.F. Originator: DiGiacomo-Cohen, M.L. Originator: Tolderlund, D.S. Publication_Date: 1998 Title: Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor in Niantic Bay, Connecticut Edition: 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Geologic Investigations Map Issue_Identification: I-2625 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Data_Quality_Information: Logical_Consistency_Report: No additional checks for consistency were performed on this data. Completeness_Report: All collected data were processed and used to produce this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal position of the launches acquiring multibeam bathymetry were determined using GPS corrected by U.S. Coast Guard differential GPS beacon stations at Moriches, New York, and Sandy Hook, New Jersey. 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 1 m; the final CARIS combined base surface for the MBES data was produced at a 3-m cell size; original cell size of the gridded LIDAR data was primarily 4 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: 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. The vertical resolution of the multibeam data is approximately 0.5% of the water depth. 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. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Emily B. Christman Originator: National Oceanic and Atmospheric Administration Publication_Date: Unknown Title: H11442 bathymetry Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20050418 Ending_Date: 20050506 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Information unavailable from original metadata. Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: National Oceanic and Atmospheric Administration Originator: Darren Stephenson Publication_Date: Unknown Title: H11225 bathymetry Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20040120 Ending_Date: 20040305 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Information unavailable from original metadata. Source_Contribution: Original processed LIDAR bathymetric data. Process_Step: Process_Description: Two 8.5-m aluminum Jensen launches deployed from the NOAA Ship Thomas Jefferson were used to acquire the multibeam echosounder (MBES) bathymetric data for surveys H11441 and H11442 during April - May 2005 off New London, Connecticut. Although most of the deeper parts of these surveys were completely covered during MBES acquisition, coverage in the shallower areas (<10 m) was limited to 'postage stamp' developments around target areas and reconnaissance cross lines. 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. Original horizontal resolution of the MBES data was 1 m; 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 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 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. The final CARIS combined base surfaces were produced at a 4-m cell size for surveys H11441, H11224, and H11225; the final CARIS combined base surface for survey H11442 was produced at a 3-m cell size. Process_Date: Unknown Source_Produced_Citation_Abbreviation: H11442 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11225 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11441 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11224 CARIS HIPS database Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Oceanic and Atmospheric Administration Contact_Person: Marc Moser 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: 757-441-6746 Contact_Electronic_Mail_Address: marc.s.moser@noaa.gov Process_Step: Process_Description: The CARIS field sheets for four surveys were inspected to determine if there was vertical and/or horizontal offsets where the surveys overlapped. NOAA LIDAR surveys (H11224 and H11225) showed no relative offset in either the vertical or horizontal direction. The same was found for the two adjacent NOAA multibeam surveys (H11441 and H11442). However, a consistent 25-cm vertical offset was found between the multibeam and LIDAR data sets, with the multibeam data being consistently 25 cm shallower than the overlapping LIDAR survey. To correct this problem, it was decided that multibeam surveys H11441 and H11442 would be offset (deeper) by 25 cm and thus referenced to LIDAR surveys H11224 and H11225. After reviewing the Data Acquisition and Processing Reports (DAPR) in addition to the Descriptive Report (DR) for each of the 4 surveys, 25 cm is within the vertical error budget as reported by Tenix for the LADS system, and as reported for the Reson 8101 and 8125 systerms installed on the NOAA launches. Vertical control was the same for all surveys. Since the 25 cm offset was not outside of the error analyses for all surveys, it was decided to reference the multibeam data to the LIDAR data by lowering the multibeam depth soundings, mainly to keep the 0 LIDAR depth contour (sea surface as obtained by the LADS system) at sea level, but also because the Tenix LADS surveys were conducted using real-time kinematic GPS techniques and judged to be accurate in the vertical dimension. Source_Used_Citation_Abbreviation: H11441 CARIS HIPS database Source_Used_Citation_Abbreviation: H11442 CARIS HIPS database Source_Used_Citation_Abbreviation: H11224 CARIS HIPS database Source_Used_Citation_Abbreviation: H11225 CARIS HIPS database Process_Date: 2009 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth 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 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The field sheets from surveys H11442 and H11225 (average depths, not the shoal based field sheets) were imported into the Fledermaus v6.7 program DMagic to make equivalent digital terrain model (DTM) files. The floating piont format for each sounding depth point is preserved during data import. Additionally, these fieldsheets were imported into DMagic as "gridded data", therefore re-gridding of data did not occur during the import process and thus preserved the original resolutions of the CARIS fieldsheets: H11442 3 meter cell size H11225 4 meter cell size The H11442 DTM file was then exported as an ESRI ASCII raster file from the DMagic program. The export process preserves the floating point values of the grid cell nodes. Source_Used_Citation_Abbreviation: H11442 CARIS HIPS database Source_Used_Citation_Abbreviation: H11225 CARIS HIPS database Process_Date: 2009 Source_Produced_Citation_Abbreviation: h11442.dtm Source_Produced_Citation_Abbreviation: ET_25m.geo Source_Produced_Citation_Abbreviation: h11225.dtm Source_Produced_Citation_Abbreviation: h11442.asc Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth 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 Country: USA Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The ESRI ASCII raster files were imported into ArcMap v9.3 using the ASCII to Raster tool (ArcToolbox, Conversion Tools, To Raster). The only option set here is to import each sounding grid cell value as a floating point number. Subsequently, 25 cm was added to the H11442 raster grid cells, creating a new raster that could now be combined with the LIDAR data set. The H11442 raster file was then exported out of ArcMap using the Raster to ASCII tool (ArcToolbox, Conversion Tools, From Raster). Source_Used_Citation_Abbreviation: h11442.asc Process_Date: 2009 Source_Produced_Citation_Abbreviation: h11442.asc Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth 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 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The adjusted multibeam raster was imported back into the Fledermaus v6.7 DMagic program in order to create new DTM files that could be combined with the LIDAR DTM files. The floating piont format for each sounding depth point is preserved during data import. Additionally, the data from the ArcGIS ASCII raster files were imported into DMagic as "gridded data", therefore re-gridding of data did not occur during the import process and thus preserved the original resolutions of the CARIS fieldsheets. Source_Used_Citation_Abbreviation: h11442.asc Process_Date: 2009 Source_Produced_Citation_Abbreviation: h11442.dtm Source_Produced_Citation_Abbreviation: h11346_mb25m_geo.tfw Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth 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 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The DTM files from surveys H11442 (now 25 cm deeper) and H11225 were combined into one 4-m grid file using the Fledermaus command line option dtmmerge, and the combined H11442-H11225 grid was exported from DMagic as an ESRI ASCII raster file. The dtmmerge option combines the input grid files and sets the resolution of the output combined grid to the lowest resolution input grid, in this case the LIDAR grid. Additionally the output soundings for the combined grid is based on the average of the nearest input grid soundings for a particular output grid cell. The command line used was: dtmmerge -in h11225.dtm h11442.dtm -out niantic.dtm -cellsize 4.0 -mode average Source_Used_Citation_Abbreviation: h11442.dtm Source_Used_Citation_Abbreviation: h11225.dtm Process_Date: 2009 Source_Produced_Citation_Abbreviation: niantic.asc Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth 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 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The ESRI ASCII raster file was then converted into raster within ArcToolbox v9.3 using the ASCII to Raster conversion tool, and reprojected using the data management tool Project Raster (ArcToolbox, Data Management Tools, Projections and Transformations) from UTM Zone 18N, NAD 83 to Geographic, WGS84. The options specified in the Project Raster tool were: 1. Input coordinate system: NAD_1983_UTM_Zone_18N 2. Output coordinate system: GCS_WGS_1984 3. Geographic transformation method: NAD_1983_WGS_1984_5 4. Resampling technique: BILINEAR 5. Output cell size: 0.000043 (decimal degrees, default as calculated by ArcMap for a 4 meter cell size) The geographic transformation selected is the most accurate one provided by ESRI as it ties in WGS84 with ITRF96, thus reflecting the earth centered offset (x-y-z) between WGS84 and NAD83 (from the ESRI Knowledge Base Document Number 24159). Source_Used_Citation_Abbreviation: niantic.asc Process_Date: 2009 Source_Produced_Citation_Abbreviation: niantic_geo Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth 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 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: A color, hill-shaded GeoTIFF images with world file was created within DMagic and IVS Image Viewer. Sun illumination is from the north at 45 degrees above the horizon, and vertical exaggeration is 4x. Source_Used_Citation_Abbreviation: niantic_geo Process_Date: 2009 Source_Produced_Citation_Abbreviation: niantic_mblidar_geo.tif Source_Produced_Citation_Abbreviation: niantic_mblidar_geo.tfw Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth 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 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: 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.). In the case of the depth resolution, the value of 9999 was entered to indicate that the original metadata did not contain the required information. 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. Process_Date: 20160412 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: USGS Thesaurus keywords added to the keyword section. Process_Date: 20180720 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: Crossref DOI link was added as the first link in the metadata. Process_Date: 20191118 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200908 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 1801 Column_Count: 3634 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000043 Longitude_Resolution: 0.000043 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Mean lower low water Depth_Resolution: 9999 Depth_Distance_Units: meters Depth_Encoding_Method: Implicit coordinate 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. Warmer colors (e.g. red) are shallower depths; cooler colors (e.g. blues) are deeper. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey 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, 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Format_Version_Number: Information unavailable from original metadata. Format_Specification: GeoTIFF Format_Information_Content: One file (niantic_mblidar_geo.zip) containing the GeoTIFF, world file, browse graphic and metadata. File_Decompression_Technique: zip archive Transfer_Size: 8.4 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2009/1231/data/bathy/geotifs/niantic/niantic_mblidar_geo.zip Network_Resource_Name: http://pubs.usgs.gov/of/2009/1231/html/catalog.html Access_Instructions: Data are downloadable via the World Wide Web (WWW). Offline_Option: Offline_Media: CD-ROM Recording_Capacity: Recording_Density: 640 Recording_Density_Units: Mbytes Recording_Format: ISO9660 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. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Metadata_Reference_Information: Metadata_Date: 20211116 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: whsc_data_contact@usgs.gov Contact_Instructions: 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. 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