Map indicating locations of Alexandria, Syene, and Athens, for student reference.

Original Image—World Map with Equator; Source: http://en.wikipedia.org/wiki/File:World_map_with_equator.jpg; License: GFDL, User:Cburnett

Modified Image—Map showing Athens, Alexandria, and Syene; Source: own work; License: CC-BY-SA, Meredith Beaton