This speech will focus on introduction to project OpenStreetMap. After slight structural definitions we will describe several technical outputs, which we made possible thanks to openness of these data (mobile maps, printed versions, 3D maps, other colour schemes, routing, searchnig, geocoding, ...) and also thematic maps (hiking, cycling, car, whitewater, sea, ...). We will also pay attention to the reasons of creating the OpenStreetMap project, mainly from the point of view of accasibility and compatibility of geo data, so from the OpenData point of view.