Maps of other worlds
Planisphere of Mars drawn from observations made in 1911 at the Urania Observatory, Copenhagen
Mars — map
Authors: MM. C. Luplau-Janssen and E. Buch-Andersen
Observatory of Copenhagen.
Source: Camille Flammarion Annuaire Astronomique pour 1913. (vol 49). Paris, Librarie Ernest Flammarion.

Courtesy of I. Almar