The Ohio DNR Hydrologic Atlas provides hydrological data for Ohio that is useful for environmental assessments and planning.
The Ohio Coastal Atlas (OCA) Map Viewer displays geospatial information about Lake Erie and its watershed to support coastal decision-makers, land management professionals, engineers, educators, interest groups, and the general public. Many of the data layers are also highlighted in the Ohio Coastal Atlas Second Edition.
The Estuary Data Mapper (EDM) is a free, interactive, downloadable application under development at the US EPA that allows users to quickly and easily retrieve, view, and save subsets of online US coastal estuary-related data. It is intended to help researchers, managers, and decision-makers find and map data relevant to coastal estuary systems.
Bathymetry of the Great Lakes has been compiled as a component of a NOAA project to rescue Great Lakes lake floor geological and geophysical data and make it more accessible to the public. The project is a cooperative effort between investigators at the NOAA National Centers for Environmental Information (NCEI) and the NOAA Great Lakes Environmental Research Laboratory (GLERL) was compiled utilizing the entire historic sounding database.