*** Presented at State of the Map 2013, by Frédéric Rodrigo ***
*** For more info including slides, where available, see http://lanyrd.com/2013/sotm/scphkp/
*** Full schedule also available at http://wiki.openstreetmap.org/wiki/State_Of_The_Map_2013
Osmose (OpenStreetMap Oversight Search Engine), is one of many quality assurance tools able to detect errors and inconsistencies in OpenStreetMap data. This tool is built in two parts. Firstly, backends for data analysis and errors detection. We look at three main kinds of data analysis: PostGIS, Sax and OpenData integration and show the differential analysis capacity. Many backends can be supported. Secondly, the frontend display errors on a slippy map and serve it on the API. We will demonstrate error classification. We will make a short presentation on the history and growing coverage since 2009. Coverage depends on server availability but also on areas specificities: language, legislation, driving side... Osmose, a quality assurance tool just waiting to be known.