OpenEcoMap is an online map, which supports landscape planners during the analysis process. It shows data from the OpenStreetMap (OSM) database which is relevant for landscape planning projects. It has a special focus on data which is missing in official datasets. The crowdsourced data of OSM can be edited and used by anyone. Projects in landscape planning always start with an analysis which contains complementary data from different sources. This can be official geospatial data from public authorities and data from one’s own field investigations. This paper describes a tool, which allows complementing data from one’s own investigations with open data from OSM. At the same time, the data stock of OSM becomes gradually completed. OpenEcoMap, some kind of “OpenStreetMap for landscape architects” is developed by the University of Applied Sciences Rapperswil (Hochschule für Technik Rapperswil, HSR). It is an online map based on the data of OSM, showing only data which complement the official data. OpenPOIMap is also developed by the HSR and allows downloading data from OSM in several formats to process them in geographic information systems (GIS) systems.