Distortion Effects in Equal Area Unit Maps

Abstract Maps that correctly represent the geographic size and shape of regions, taking into account scaling generalization, have disadvantage small regions can easily be overlooked or not seen at all. Hence, for some map use tasks where are importance, alternative types needed. One option is so-called equal area unit maps (EAUMs), every enumeration has same size, possibly also basic such as squares hexagons. The geometrical distortion EAUMs, however, leads to a more difficult search well falsification topological relationships spatial patterns. To describe these distortions, set analytical measures proposed. But it turns out expressiveness rather limited. better understand model influence two user studies were conducted. study on in EAUMs (also with aim reconstruct strategies users) revealed how important consider local topology (e.g. corner border positions regions) during generation process. With regard pattern identification, could shown significantly increase detection rate extreme values. On other hand, global lateral gradients geostatistical hot spots often get blurred even lost. As consequence, task-oriented selection further developments recommended.