US: A new Web site, Maps of America’s Submerged Lands, is a map-based portal to maps with digital data produced by the United States Geological Survey (USGS) Coastal and Marine Geology Program. The site provides links to published USGS maps, reports and digital data that depict the bathymetry, surficial geology and (or) subsurface structure of submerged areas over a wide range of scales. The digital data are available as shape files, images, or grids in GIS format.
A map on the home page shows the outlines of maps currently available. Clicking on an outline opens a small window that displays the report title and provides links to the report and to the data catalogue. Users can navigate around the map by using the pan tool and can zoom in by double-clicking anywhere on the map; these actions can also be performed by using the control bar on the left of the image. Links below the map on the home page provide a bibliography of the map publications by region.
Rather than creating a separate database, the Web site uses the USGS publications to serve the data. For the most part, only maps with digital data are included and maps in progress are not shown. Maps will be added as they are published. This site provides a single location for linking to USGS Coastal and Marine Geology Program offshore maps and data and complements the Program’s Internet Map Server.