This page details a specific electronic resource that has been indicated by Villanova Librarians as useful in conducting research.
Ocean Basemap - ArcGIS
This map service is designed to be used as a basemap by marine GIS professionals and as a reference map by anyone interested in ocean data. The basemap includes bathymetry, marine water body names, undersea feature names, and derived depth values in meters. Land features include administrative boundaries, cities, inland waters, roads, overlaid on land cover and shaded relief imagery.