The OpenStreetMap (OSM) project is an open-source, community-based, user-generated street map/data service. It the most popular within state of art for crowdsourcing. Although geometrical features and tags annotations in OSM are usually precise (particularly metropolitan areas), there instances where volunteer mapping inaccurate. Despite appeal using semantic information with remote sensing ima...

Abstract. Flood risk modelling aims to quantify the probability of flooding and resulting consequences for exposed elements. The assessment flood damage is a core task that requires description complex processes including influences intensity vulnerability characteristics. Multi-variable approaches are better suited this purpose than simple stage–damage functions. However, multi-variable models...

This short paper reviews and clarifies the concept of heat maps for data visualization on cartographic maps. We show how heat maps can serve as a tool for powerful data exploration by presenting a practical example taken from the context of volunteered geographic information. In particular, we demonstrate how heat maps can help to get an overview over the users’ contribution behavior of informa...

Encouraging users to create image content for such systems is a possible solution to the lack of image databases. There are efforts to open up the content map-based systems rely upon (e.g. OpenStreetMap). However, to our knowledge, the only existing product that supports users in creating content for image-based navigation is the application BreadCrumbz. We know of no scientifi c investigations...