Create map of type:
Earth (Longitude/Latitude)
This option allows you to import a map stored in longitude/latitude coordinates
Earth (Projected)
This option accesses the Choose Projection dialog box. You can import a map stored in some other coordinate system, such as any of the State Plane coordinates, or the UTM's using this dialog box.
Non-Earth
This option accesses the Non-Earth Coordinate System dialog box. You can set coordinate units and import a non-earth map using this dialog box.