OSMatrix – Grid-based Analysis and Visualiza- tion of OpenStreetMap

Since data in OpenStreetMap is mostly surveyed by untrained private citizens rigorous quality control is required in order to produce a reliable data set. “Hidden” information, such as user activities, topicality of data, which is typically not visualized in maps might indicate areas with increased need for quality assessments. OSMatrix is a visual analytics approach that provides such information. The paper presents a short introduction to the OSMatrix application and some preliminary findings drawn from the resulting maps.