Abstract
Mental maps are a cartographic illustration of a person’s internal representation of the spatial environment in which they live. They are often used to provide an insight into how different ethnic or social groups perceive their environment. A new method of measuring the distortions present in mental maps is developed and tested using a global positioning system (GPS) and a geographic information system (GIS). Results suggest distortions are apparent the further away subjects travel from their familiar environment and that there are consistent scales at which mental maps operate.