We found 2 dictionaries that define the word map makers:

General (2 matching dictionaries)

1. map makers: Vocabulary.com
2. map-makers: Wordnik

(Note: See map_maker as well.)

Definitions from WordNet (map maker) ▸ noun:  a person who makes maps ▸ Also see map_maker ▸ Words similar to map makers ▸ Usage examples for map makers ▸ Idioms related to map makers ▸ Wikipedia articles (New!) ▸ Words that often appear near map makers ▸ Rhymes of map makers ▸ Invented words related to map makers