{ "culture": "en-US", "name": "BlueTopo_TileScheme_20250331_DRAFT", "guid": "6D6D9832-23FF-45AA-AF81-2B7E0CCB8E1C", "catalogPath": "", "snippet": "BlueTopo is a compilation of the nation's best available bathymetric data. 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. Created as part of the Office of Coast Survey nautical charting mission and its National Bathymetric Source project, BlueTopo is curated bathymetric source data to provide a definitive nationwide model of the seafloor and the Great Lakes. \n\n
<\/br>\n\nThis service is not for navigation and 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 eventually the contributor layer. Products generated with these data are not to be used for measurements or navigation. \n\n
<\/br>\n\nThe vertical coordinate reference system for BlueTopo is included as metadata in each GeoTIFF and can be accessed by downloading the data via the BlueTopo Tile Scheme layer on the nowCOAST map viewer. The products are referenced to the current vertical datums for the United States as specified at NOAA Vertical Datums<\/a> and using NGS GEOID<\/a> models. The relationship of tidal datums to various vertical coordinate reference systems are modeled through NOAA VDatum gridded transforms; for VDatum terms of use see VDATUM<\/a>. Navigational datums used by NOAA represent a further distinction to this assembly, as defined through the publication of official nautical chart data. For further information see BlueTopo<\/a>.\n\n
<\/br>\n\nBlueTopo is available to view and access through
nowCOAST™<\/a> and is available through NOAA's Open Data Disse", "description": "", "summary": "BlueTopo is a compilation of the nation's best available bathymetric data. 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. Created as part of the Office of Coast Survey nautical charting mission and its National Bathymetric Source project, BlueTopo is curated bathymetric source data to provide a definitive nationwide model of the seafloor and the Great Lakes. \n\n
<\/br>\n\nThis service is not for navigation and 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 eventually the contributor layer. Products generated with these data are not to be used for measurements or navigation. \n\n
<\/br>\n\nThe vertical coordinate reference system for BlueTopo is included as metadata in each GeoTIFF and can be accessed by downloading the data via the BlueTopo Tile Scheme layer on the nowCOAST map viewer. The products are referenced to the current vertical datums for the United States as specified at
NOAA Vertical Datums<\/a> and using NGS GEOID<\/a> models. The relationship of tidal datums to various vertical coordinate reference systems are modeled through NOAA VDatum gridded transforms; for VDatum terms of use see VDATUM<\/a>. Navigational datums used by NOAA represent a further distinction to this assembly, as defined through the publication of official nautical chart data. For further information see BlueTopo<\/a>.\n\n
<\/br>\n\nBlueTopo is available to view and access through
nowCOAST™<\/a> and is available through NOAA's Open Data Disse", "title": "BlueTopo_TileScheme_20250331_DRAFT", "tags": [ "bathymetry" ], "type": "Map Service", "typeKeywords": [ "Data", "Service", "Map Service", "ArcGIS Server" ], "thumbnail": "thumbnail/thumbnail.png", "url": "", "extent": [ [ -134.399999999857, 16.7999999999197 ], [ -64.199999999747, 58.4999999997913 ] ], "minScale": 0, "maxScale": 1.7976931348623157E308, "spatialReference": "WGS_1984_Web_Mercator_Auxiliary_Sphere", "accessInformation": "", "licenseInfo": "" }