NOAA > NESDIS > NCEI (formerly NGDC) > Marine Geology and Geophysics > Bathymetry & Relief privacy policy  All Bathy/Relief Coastal DEMs Fishing Global Lakes Multibeam NOS

Report for H13994 Locality: Northern Massachusetts Bay Sublocality: Central Approaches to Boston Harbor State(s) or Region(s): Massachusetts Start Date: 2024-09-10 End Date: 2025-03-15 These data are not to be used for navigation. For navigation please refer to NOS Nautical Charts. Download All Products for H13994 Download times vary depending on file size and data transfer rates. Individual product files may be downloaded via the links below. Launch this map service in full-screen view | Visit the full NCEI Bathymetric Data Viewer Survey Products Descriptive Report and Metadata Documents NOAA/NOS Descriptive Reports and Metadata Documents Products listed in these reports may not reflect final products available through NCEI. H13994_DR.pdf 1.29MB The document may be read using a free PDF reader. H13994_DR.xml 51.5KB Descriptive Report in XML format. May be opened using a web browser or text viewer. NOAA/NOS ISO metadata record H13994 View / Download H13994.xml Usually presented as an XML document, which captures the basic characteristics of HSMDB metadata verified from H10000 (1982) to the present as well as F00200 (1965) to the present. Bathymetry Survey products may use different units, datums or projections than the associated survey. Please consult product-specific metadata for additional details. Bathymetric Attributed Grid (BAG) The BAG format is a gridded, multi-dimensional bathymetric data file readable with geospatial visualization software (various commercial solutions, freeware, and open source applications are available). The BAGXYZ files are ascii representations of the BAG data in XYZ format, but do not include uncertainty. H13994_MB_1m_MLLW_2of2.bag 38.52MB H13994_MB_50cm_MLLW_1of2.bag 994.10MB Imagery GeoImagePDF Georeferenced PDF file including chart and survey layers. H13994_GeoImage.pdf 20.99MB NOAA/NOS multibeam acoustic backscatter mosaic in TIFF format The multibeam acoustic backscatter mosaic is readable with geospatial visualization software (various commercial solutions, freeware, and open source applications are available). H13994_MBAB_2m_400kHz_1of1.tif 16.99MB Project Documents Data Acquisition and Processing Report in PDF format OPR-A325-KR-24_DAPR.pdf 48.21MB Horizontal and Vertical Control Report in PDF Format OPR-A325-KR-24_HVCR.pdf 2.14MB Survey Metadata Survey Summary Locality Sublocality State or Region Northern Massachusetts Bay Central Approaches to Boston Harbor Massachusetts Start Date End Date Approval Date 2024-09-10 2025-03-15 2025-06-05 Project Number Project Name Purpose OPR-A325-KR-24 Source of Original Data and License Information License Information These data were produced under contract with NOAA and any potential copyright was assigned to NOAA. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0-1.0). View the license deed. View the legal code. Reference System Information Vertical Datum Horizontal Datum Projection Scale Mean Lower Low Water North American Datum 1983 (2011) Projected UTM 19 5000 Affected Products ENCs RNCs US5BOSDE US5BOSCF US5BOSCE US5BOSBF Survey Equipment Vessel(s) Chief(s) of Party RV West Cove II MV Northstar Challenger RV North Cove RV South Cove John R. Bean Manufacturer Model Instrument Type AML Oceanographic AML-3 LGR Conductivity, Temperature, and Depth Sensor Teledyne RESON SeaBat T50-R MBES AML Oceanographic Micro SV-Xchange Sound Speed System AML Oceanographic MVP30-350 Conductivity, Temperature, and Depth Sensor Velodyne LiDAR VLP-16 Lidar System Trimble NetR9 Positioning System Applanix POS MV 320 v5 Positioning and Attitude System Source Data at NCEI Data in Archive Size (in GB) Date Archived Data Types Surveyed Raw and Processed 883.574 2025-10-16 10:00:22.0 BACKSCATTER, BATHYMETRY