Marine Cadastre Data Viewer and Portal
The Marine Cadastre Data Viewer and Portal provides direct access to authoritative marine cadastral data from U.S. federal and state sources, including information on the tracks of vessels, bathymetry, administrative boundaries, and fish, bird, and other species. It provides baseline information needed for ocean planning efforts, particularly those that involve finding the best location for renewable energy projects. The MarineCadastre.gov National Viewer uses Esri web GIS technology and is also a helpful tool in the permit review process. Users can select the ocean geography of their choosing and quickly see the applicable jurisdictional boundaries, restricted areas, laws, critical habitat locations, and other important features. With the national viewer, potential conflicts can be identified and avoided early in the planning process.
The site offers two distinct advantages: 1) The ability to view over 75 data layers from a variety of sources in a single live ArcGIS Online-based web map viewer; 2) The ability to download those same layers from the map interface for additional analysis. We have been critical in this blog about sites that get the user tantalizingly close to downloading the data but never quite allow it. This one delivers. The only thing I have not been able to get to work during my review of the resource is the buffer tool.
See this site for additional information about the data layers and services. In addition, you can explore the set of layers on ArcGIS Online in the Marine Cadastre group.