The /gis/gom directory contains GIS data spanning 2 or more states in the Gulf of Maine, plus it also includes national and world data. For data contained entirely in Maine, New Hampshire or Massachusetts, see the appropriate directory.
| Directory | Description |
| 24kbase | Gulf of Maine base 24k data such as roads, hydro, political boundaries. Created in 2003 for IMS. |
| bd | Biological data (aerial surveys, etc.) |
| BOEM | Bureau of Ocean Energy Management |
| cv | Gulf of Maine watershed, regional and national coverages. |
| drg | 1:250k scale (300MB) and 1:100k scale (1.8GB)USGS scanned topo quads |
| EPA | Data from U.S. Environmental Protection Agency. |
| FAA | Data from Federal Aviation Administration. |
| habstudy | Data from the GOM Watershed Habitat Study |
| NHD | GOM-wide National Hydrology Data (NHD) |
| NOAA | Data from NOAA. |
| NREL | National Renewable Energy Laboratory data - wind energy. |
| TNC | Regional/National data from The Nature Conservancy |
| USFS | Data from US Forest Service, including Bailey's land cover. |
| USFWS | Data from USFWS including NWR boundaries, data for specific refuges, climate change, SHC, Regional boundaries, etc. |
| USGS | Data from USGS. |
