georama

from The Century Dictionary.

• noun A large hollow globe or spherical chamber lined with cloth on which is depicted a general view of the geography of the earth's surface so as to be seen by a spectator from the interior.

from the GNU version of the Collaborative International Dictionary of English.

• noun A hollow globe on the inner surface of which a map of the world is depicted, to be examined by one standing inside.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A hollow globe with a map of the world on its inner surface, so as to be examined by one standing inside.