Spatial Coverage
- Madagascar.1
- Madera County1
- Maricopa County1
- Mariposa County1
- Maritime Provinces1
- Massachusetts1
- McBeth Fiord1
- Michigan1
- Middle East1
- Millard County1
- Mineral County1
- Missouri1
- Moapa Band of Paiute Indians of the Moapa River Indian Reservation, Nevada1
- Moapa River Reservation1
- Moapa River Reservation (Nev.)1
- Mohave County1
- Monroe County1
- Moquegua (Peru : Dept.)1
- Moscow (Russia)1
- Nebraska1
