gov.noaa.nmfs.inport:75311 eng UTF8 model GeoTiff Office of Coast Survey resourceProvider Office of Coast Survey 1315 East West Highway Silver Spring MD 20910 https://www.nauticalcharts.noaa.gov/ WWW:LINK-1.0-http--link Office of Coast Survey Website Website listed for Office of Coast Survey information ocs.nbs@noaa.gov pointOfContact 2026-03-18T12:39:09 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EPSG::5703 BlueTopo BlueTopo_NBS 2021-05-14 creation publication NOAA/NMFS/EDM 75311 https://www.fisheries.noaa.gov/inport/item/75311 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://noaa-ocs-nationalbathymetry-pds.s3.amazonaws.com/index.html#BlueTopo/ WWW:LINK-1.0-http--link NOAA National Bathymetric Source Data AWS bucket Online Resource download BlueTopo is a compilation of the nation's best available bathymetric data. Created as part of the NOAA Office of Coast Survey's nautical charting mission and its National Bathymetric Source (NBS) program, BlueTopo is curated bathymetric source data to provide a definitive nationwide model of the seafloor and navigational lakes. In the same way that a topographic map details the height of land, BlueTopo details the depth of lake beds and seafloor beneath navigationally significant U.S. waters. Primary sources of bathymetry in NBS compilations include NOAA and U.S. Army Corps of Engineers hydrographic surveys and topographic bathymetric (topo-bathy) lidar (light detection and ranging) data. Data submitted through the NOAA Office of Coast Survey's external source data process are also included. Coverage gaps in water over 200 meters are filled in BlueTopo through Global Multi-Resolution Topography, a merged model of bathymetry made available through Lamont-Doherty Earth Observatory. In addition to compiled bathymetry, BlueTopo contains metadata with quality metrics from the source data to enable the appropriate use of the product. Created as part of the NOAA Office of Coast Survey's nautical charting mission and its National Bathymetric Source (NBS) program, BlueTopo is curated bathymetric source data to provide a definitive nationwide model of the seafloor and navigational lakes. In the same way that a topographic map details the height of land, BlueTopo details the depth of lake beds and seafloor beneath navigationally significant U.S. waters. Source information is included with each file. onGoing Office of Coast Survey 1315 East West Highway Silver Spring MD 20910 https://www.nauticalcharts.noaa.gov/ WWW:LINK-1.0-http--link Office of Coast Survey Website Website listed for Office of Coast Survey information ocs.nbs@noaa.gov custodian continual EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY theme Global Change Master Directory (GCMD) Science Keywords 17.0 DOC/NOAA/NOS/OCS > Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian ocs project InPort otherRestrictions Cite As: Office of Coast Survey, [Date of Access]: BlueTopo [Data Date Range], https://www.fisheries.noaa.gov/inport/item/75311. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. license These data were produced by NOAA and are not subject to copyright protection in the United States. 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). SPDX License: Creative Commons Zero v1.0 Universal (CC0-1.0) otherRestrictions Access Constraints: Unrestricted otherRestrictions Use Constraints: Data use constraints for BlueTopo vary as it is derived from multiple source datasets. Please check the source data layer for specific data use constraints. otherRestrictions Distribution Liability: Creative Commons - CC0-1.0 unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 75311 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocs/dmp/pdf/75311.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference grid eng; US oceans 150 60 0 75 Ocean Sector 1807 -6000 20 false eng false https://nauticalcharts.noaa.gov/data/bluetopo_specs.html https://nauticalcharts.noaa.gov/data/bluetopo_specs.html WWW:LINK-1.0-http--link Entity Attribute Detail URL Entity Attribute Detail URL information TMS - Tile Map Service GeoTIFF Office of Coast Survey 1315 East West Highway Silver Spring MD 20910 https://www.nauticalcharts.noaa.gov/ WWW:LINK-1.0-http--link Office of Coast Survey Website Website listed for Office of Coast Survey information distributor https://nowcoast.noaa.gov/geoserver/gwc/service/wmts?REQUEST=GetCapabilities WWW:LINK-1.0-http--link https://nowcoast.noaa.gov/geoserver/gwc/service/wmts?REQUEST=GetCapabilities BlueTopo is available to view and access through nowCOAST. The nowCOAST map viewer makes BlueTopo available through a web map tile service and the viewer download https://noaa-ocs-nationalbathymetry-pds.s3.amazonaws.com/index.html#BlueTopo/ WWW:LINK-1.0-http--link https://noaa-ocs-nationalbathymetry-pds.s3.amazonaws.com/index.html#BlueTopo/ Three-layer GeoTIFFs with elevation, uncertainty, contributor information, and raster attribute table (RAT) layers. All layers are presented as 32-bit floating point values. Available to download through NOAA's Open Data Dissemination Program at Amazon Web Services bucket. download model Accuracy Depth- and Source-dependent Horizontal Positional Accuracy Depth- and Source-dependent Vertical Positional Accuracy Depth- and Source-dependent Completeness Report Complete Conceptual Consistency Complete BlueTopo is available for download as three layer GeoTIFFs with elevation, uncertainty, and raster attribute table (RAT) layers. All layers are presented as 32-bit floating point values. The bathymetry is compiled from multiple sources with varying quality and includes forms of interpolation. The bathymetric quality and interpolation is described through the vertical uncertainty layer and the associated data quality raster attribute table.