If you are after high resolution bathymetry/elevation data for regional areas please check the related links.Д«ecker, J. The data is available from UCSD FTP server as 33 NetCDF files and from the eAtlas as a merged GeoTiff. multibeam data and then worked with Google researchers on the global integration. UCSD undergraduate student Alexis Shakas processed all the U.S. research vessels over the past three decades including 287 Scripps expeditions from research vessels Washington, Melville and Revelle. This new version (v8.0) includes all of the multibeam bathymetry data collected by U.S. Matching files of source identification number are available for determining the data source for every pixel. The data are also merged into a single large (1.9 Gbyte, 2-byte integer) file as well as smaller 1-minute and 2-minute netcdf versions. The pixel-registered data are stored in 33 files with names corresponding to the upper left corner of the array shown below. The eAtlas has also merged and formatted the data as a single GeoTiff file with overviews (1.6 GB). In addition the global data are also available in a single large file ready for GMT and as 33 NetCDF files. The grid resolution is 30 second which is roughly one kilometer.

This data consists of 33 files of global topography in the same format as the SRTM30 products distributed by the USGS EROS data center. Arctic bathymetry is from the International Bathymetric Chart of the Oceans (IBCAO). Higher resolution grids have been added from the LDEO Ridge Multibeam Synthesis Project, the JAMSTEC Data Site for Research Cruises, and the NGDC Coastal Relief Model. Ocean data are based on the Smith and Sandwell global 1-minute grid between latitudes +/- 81 degrees. GTOPO30 data are used for high latitudes where SRTM data are not available. Land data are based on the 1-km averages of topography derived from the USGS SRTM30 grided DEM data product created with data from the NASA Shuttle Radar Topography Mission. The SRTM30_PLUS dataset developed by Scripps Institute Of Oceanography, University of California San Diego (UCSD). The main contribution of this dataset is the compilation and editing of the raw soundings, which come from NOAA, individual scientists, SIO, NGA, JAMSTEC, IFREMER, GEBCO, and NAVOCEANO. Ocean bathymetry is based on a new satellite-gravity model where the gravity-to-topography ratio is calibrated using 298 million edited soundings. Land and ice topography comes from the SRTM30 and ICESat topography, respectively. This dataset is a 30-arc second resolution global topography/bathymetry grid (SRTM30_PLUS) developed from a wide variety of data sources. The rest of this metadata describes the original SRTM30_PLUS dataset itself. No other modifications to the data were done. All 3DEP products are public domain.This dataset corresponds to a reformatting of the SRTM30_PLUS digital elevation dataset from 33 NetCDF files into a single GeoTiff for use in GIS applications. Other 3DEP products include five-meter DEMs in Alaska as well as various source datasets including the lidar point cloud and interferometric synthetic aperture radar (Ifsar) digital surface models and intensity images. These seamless DEMs were referred to as the National Elevation Dataset (NED) from about 2000 through 2015 at which time they became the seamless DEM layers under the 3DEP program and the NED name and system were retired. Other 3DEP products are nationally seamless DEMs in resolutions of 1/3, 1, and 2 arc seconds. The one-meter DEM is the highest resolution standard DEM offered in the 3DEP product suite. If a tile crosses two UTM zones, it is delivered in both zones. Each tile is distributed in the UTM Zone in which it lies. All bare earth elevation values are in meters and are referenced to the North American Vertical Datum of 1988 (NAVD88). The spatial reference used for tiles of the one-meter DEM within the conterminous United States (CONUS) is Universal Transverse Mercator (UTM) in units of meters, and in conformance with the North American Datum of 1983 (NAD83). One-meter DEM surfaces are seamless within collection projects, but, not necessarily seamless across projects.

USGS standard one-meter DEMs are produced exclusively from high resolution light detection and ranging (lidar) source data of one-meter or higher resolution. The elevations in this DEM represent the topographic bare-earth surface. Scientists and resource managers use 3DEP data for hydrologic modeling, resource monitoring, mapping and visualization, and many other applications. This is a tiled collection of the 3D Elevation Program (3DEP) and is one meter resolution.The 3DEP data holdings serve as the elevation layer of The National Map, and provide foundational elevation information for earth science studies and mapping applications in the United States.

World geotiff maps