Whilst maps are now ubiquitous, and people of all skill levels are creating them, many still struggle to effectively interpret spatial information. This inability, or perhaps, more accurately disability, to interpret spatial information can lead to negative experiences in map users, especially when undertaking navigational tasks such as way-finding. As a result, map users can experience anything from unnecessary anxiety to tragic consequences. To improve the map reading experience for this specific population of inefficient map readers, maps must be created that allow them to interpret spatial information easily and effectively. Various methods have been used to evaluate alternatively designed maps for their ability to correctly convey spatial information to a specific population. Certain problems in testing exist in all usability testing situations. In this instance, familiarity of landscape needs to be eliminated in order for testing to be effective. This paper explores methods to evaluate this map type when used by the target population.