one who maps or describes a region
• (n.) A geographical antiquary; one who investigates the locality of ancient places. • (n.) One who describes or makes a map of a district or region.
Cho·rog'ra·pher noun 1. One who describes or makes a map of a district or region. 'The chorographers of Italy.' Sir T. Browne. 2. A geographical antiquary; one who investigates the locality of ancient places. 
chorographer Someone who describes, or delineates, a particular country or district.