This dataset is a compilation of several single-beam bathymetry surveys of the Caribbean ocean displaying a wide range of tectonic activity, uneven distribution, and even clear systematic errors in some of the survey lines.

Note: This is a processed and formatted version of the source dataset below. It's meant for use in documentation and tutorials of the Fatiando a Terra project. Please cite the original authors when using this dataset.

Changes made: Convert from MGD77 to a simpler compressed CSV format. Retain only the survey ID, coordinates, and depth. Cut the data to a slightly smaller region.

Source: NOAA NCEI

Source license: public domain

Repository: https://github.com/fatiando-data/caribbean-bathymetry

These data present the processed bathymetry mosaic for FIIS. The bathymetry data was collected June 11th-16th, 2015. The acoustic sonar survey was conducted using a EdgeTech 6205, a Multi-Phase Echo sounder system. This combined bathymetry and dual-frequency sidescan sonar system is optimized for shallow water surveying and is capable of acquiring bathymetry swath widths up to 8x the water depth. The sonar system was bow-mounted to a 28-ft pontoon survey vessel customized for shallow water surveying, including having a draft of less than one foot. Data was collected using GeoDas software developed by Ocean Imaging Consultants (OIC) and monitored topside in real-time to ensure quality of data and full-coverage sidescan was being achieved. The data were collected in association with an Applanix POS MV system to assure positional accuracy and to correct for vessel motion (pitch, roll, heave). The survey was designed to acquire full-coverage sidescan data and partial coverage bathymetry. As such, the survey was composed of parallel track lines with line spacing of 35 to 50 m and a sonar swath range of 50 m (25 m per side) to ensure overlap with adjacent lines. The raw sidescan and bathymetry records were processed using OIC CleanSweep software (Version 3.8.0, Build #263). For bathymetry, the processing following standard techniques of first correcting for tide, sound velocity, and vessel motion. Filters were then applied to remove outlier soundings. The resulting mosaic presents water depths of the survey area. All of the acoustic data were examined manually to confirm quality and accuracy. The horizontal coordinate system was set to UTM Zone 18N and bathymetry data was processed to 50cm pixel resolution.

Critical military training and testing on lands along the nation’s coastal and estuarine shorelines are increasingly placed at risk because of development pressures in surrounding areas, impairments due to other anthropogenic disturbances, and increasing requirements for compliance with environmental regulations. The U.S. Department of Defense (DoD) intends to enhance and sustain its training and testing assets and to optimize its stewardship of natural resources through the development and application of an ecosystem-based management approach on DoD installations. To accomplish this goal, particularly for installations in estuarine/coastal environments, the Strategic Environmental Research and Development Program (SERDP) launched the Defense Coastal/Estuarine Research Program (DCERP) as a minimum 10-year effort at Marine Corps Base Camp Lejeune (MCBCL) in North Carolina. The results of the first six years of the program (DCERP1) are presented here. The overarching objectives of DCERP are to: (1) understand the effects of military training activities, infrastructure development, and other coastal military installations; (2) develop models, tools, and indicators to evaluate ecosystem health; and (3) recommend adaptive management strategies to sustain ecosystem natural resources within the context of an active military installation. High-quality bathymetry data for the New River Estuary are not available as originally anticipated. Close examination of existing bathymetry by DCERP PI's revealed that either substantial changes have occurred since previous surveys, or there were significant quality control problems during previous data collection with minimal supporting metadata. Incorporation of these pre-existing data into a bathymetry DEM and subsequent merging with the NOAA GEODAS database further revealed sparse data coverage in critical regions of research for several DCERP modules. In order to address the need for accurate bathymetric data, interferometric swath bathymetry was used to produce a high resolution (5-m) bathymetric map of the New River Estuary. The resulting data will provide a vital bathymetric baseline for various monitoring and modeling DCERP modules. In addition, these data will be useful to the Base in helping them to identify areas where boats may run aground during training activities, thus preventing the loss of vessel stranding times and/or hull damage, particularly in egress and ingress of Courthouse Bay.

The NOAA National Centers for Environmental Information (NCEI) Marine Trackline Geophysics database contains bathymetry, magnetics, gravity and seismic navigation data collected during marine cruises from 1939 to the present. Coverage is worldwide. Data sources include both US and foreign oceanographic institutions and government agencies. This map service shows tracks (both ship and airborne) for all geophysical surveys in the database, split into sub-layers by data type. For more information about Marine Trackline Geophysics at NCEI, please see: http://ngdc.noaa.gov/mgg/geodas/trackline.htmlAeromagnetic surveys are also included. For more information about Geomagnetic data at NCEI, including airborne data, please see: http://ngdc.noaa.gov/geomag/data.shtmlSee NCEI's Trackline Geophysical Data Viewer (NOAA GeoPlatform entry) for an interactive mapping interface to these data. This viewer features more sophisticated searching/filtering controls, and is a recommended way of exploring the database.This dynamic map service allows these sub-layers to be toggled on/off:All Survey Types (0); visible by defaultBathymetry (1)Gravity (2)Magnetics (3)Multi-Channel Seismics (4)Seismic Refraction (5)Shot-Point Navigation (6)Side Scan Sonar (7)Single-Channel Seismics (8)Subbottom Profile (9)Aeromagnetic Surveys (10)Separate cached (tiled) map services are also available for several of these layers: All Survey Types, Single-Beam Bathymetry, Gravity, Magnetics, and Single-Channel Seismics.ISO Metadata:NCEI Marine Geophysical Trackline DatabaseAirborne Magnetic Trackline and Survey Data

The NOAA National Centers for Environmental Information (NCEI) Marine Trackline Geophysics database contains bathymetry, magnetics, gravity and seismic navigation data collected during marine cruises from 1939 to the present. Coverage is worldwide. Data sources include both US and foreign oceanographic institutions and government agencies. This map service shows tracks (both ship and airborne) for all geophysical surveys in the database, split into sub-layers by data type. For more information about Marine Trackline Geophysics at NCEI, please see: http://ngdc.noaa.gov/mgg/geodas/trackline.htmlAeromagnetic surveys are also included. For more information about Geomagnetic data at NCEI, including airborne data, please see: http://ngdc.noaa.gov/geomag/data.shtmlSee NCEI's Trackline Geophysical Data Viewer (NOAA GeoPlatform entry) for an interactive mapping interface to these data. This viewer features more sophisticated searching/filtering controls, and is a recommended way of exploring the database.This dynamic map service allows these sub-layers to be toggled on/off:All Survey Types (0); visible by defaultBathymetry (1)Gravity (2)Magnetics (3)Multi-Channel Seismics (4)Seismic Refraction (5)Shot-Point Navigation (6)Side Scan Sonar (7)Single-Channel Seismics (8)Subbottom Profile (9)Aeromagnetic Surveys (10)Separate cached (tiled) map services are also available for several of these layers: All Survey Types, Single-Beam Bathymetry, Gravity, Magnetics, and Single-Channel Seismics.ISO Metadata:NCEI Marine Geophysical Trackline DatabaseAirborne Magnetic Trackline and Survey Data