| Michigan Department of Environmental Quality |
| Locations - Oil & Gas wells - download database |
| Formation Tops & Elevations Download |
| Production of Oil and Gas wells - download |
| Michigan Public Service Commission |
| Michigan Natural Gas Production Reports |
| University of Texas at El Paso * |
| GeoNet - United States Gravity Data Repository System |
| United States and Border Region Gravity Data Search |
| ESRI GIS and Mapping Software for Michigan * |
| Download Census 2000 TIGER/LineŽ Shapefiles |
| * Convert Longitude/Latitude files to Michigan GeoRef before mapping |
| if Michigan GeoRef coordinates are used in other map layers |