NOAA Hydrographic Survey Coverage

Overview This map service shows the location and coverage of National Ocean Service hydrographic surveys for the coastal waters and Exclusive Economic Zone of the United States and its territories. It presents survey polygons with summary metadata and download links for NOAA survey products maintained by the National Centers for Environmental Information and the National Ocean Service. Layers Surveys with BAGs displays survey areas with Bathymetric Attributed Grid products available. Surveys with Digital Sounding Data displays survey areas with digital sounding data available for download, including surveys that also have Bathymetric Attributed Grid products. Surveys without Digital Sounding Data displays survey areas where digital sounding data are not available for download. Characteristics The service represents polygon survey footprints and related survey information for NOAA hydrographic survey collections. It is designed for map display, querying, and data access, with simple symbology on one layer and decade-based unique value rendering on the digital sounding data layer. User interaction can surface survey identifiers, survey dates, locality information, platform details, product identifiers, and download links. Temporal summary: The data is historical and spans hydrographic survey activity from 1837 through the modern digital survey era. Temporal attributes support review of survey begin and end dates, approval dates, modification dates, and survey year for filtering and time-based exploration of survey records. Geographic Coverage The service covers the coastal waters and Exclusive Economic Zone of the United States and its territories and uses a global Web Mercator spatial reference. Use Cases This service supports hydrographic survey discovery, coverage review, maritime spatial planning, coastal data access, and reference work for NOAA survey products and metadata. Source: NOAA National Centers for Environmental Information and National Ocean Service.