BlueTopo
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.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "Not provided - Contact data.gov",
"hasEmail": "mailto:datagovsupport@gsa.gov"
}
|
| describedBy | https://nauticalcharts.noaa.gov/data/bluetopo_specs.html |
| describedByType | application/octet-steam |
| description | 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. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "https://nowcoast.noaa.gov/geoserver/gwc/service/wmts?REQUEST=GetCapabilities",
"mediaType": "placeholder/value",
"description": "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",
"downloadURL": "https://nowcoast.noaa.gov/geoserver/gwc/service/wmts?REQUEST=GetCapabilities",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "https://noaa-ocs-nationalbathymetry-pds.s3.amazonaws.com/index.html#BlueTopo/",
"mediaType": "placeholder/value",
"description": "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.",
"downloadURL": "https://noaa-ocs-nationalbathymetry-pds.s3.amazonaws.com/index.html#BlueTopo/",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "NOAA Data Management Plan (DMP)",
"mediaType": "placeholder/value",
"description": "NOAA Data Management Plan for this record on InPort.",
"downloadURL": "https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocs/dmp/pdf/75311.pdf",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "GCMD Keyword Forum Page",
"mediaType": "placeholder/value",
"description": "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",
"downloadURL": "https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "Full Metadata Record",
"mediaType": "placeholder/value",
"description": "View the complete metadata record on InPort for more information about this dataset.",
"downloadURL": "https://www.fisheries.noaa.gov/inport/item/75311",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "Office of Coast Survey Website",
"mediaType": "placeholder/value",
"description": "Website listed for Office of Coast Survey",
"downloadURL": "https://www.nauticalcharts.noaa.gov/",
"describedByType": "application/octet-steam"
}
]
|
| identifier | gov.noaa.nmfs.inport:75311 |
| issued | 2021-05-14T00:00:00.000+00:00 |
| keyword |
[
"EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY",
"DOC/NOAA/NOS/OCS > Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce",
"ocs"
]
|
| landingPage | https://www.fisheries.noaa.gov/inport/item/75311 |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2021-05-14T00:00:00.000+00:00 |
| publisher |
{
"name": "Office of Coast Survey",
"@type": "org:Organization"
}
|
| references |
[
"https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocs/dmp/pdf/75311.pdf"
]
|
| rights | otherRestrictions, unclassified |
| spatial | 60.0,0.0,150.0,75.0 |
| temporal | 1807-01-01T00:00:00+00:00/1807-01-01T00:00:00+00:00 |
| title | BlueTopo |
