Map of Mesoamerican civilizations cultural area.
Own work. Sources of data:

Elevations and bathymetry : NGDC ETOPO1 (public domain)
Shores and rivers : NGDC GSHHS (public domain)
Mesoamerican area : File:Mesoamérica.png by Yavidaxiu (licence GFDL or CC-BY-SA 3.0)
Globe location : File:Mesoamerica (orthographic projection).svg by TownDown (licence GFDL or CC-BY-SA 3.0)
Sémhur