Besides the classical focus on the desktop browser we also offer applications that are optimized for mobile devices. Mobile applications are characterized on the one hand by reduced user interfaces due to the smaller screen sizes. On the other hand the mobile versions support several functions that are exclusive to mobile devices. Positioning is one example, that is highly interesting in combination with mobile WebGIS applications. It allows to automatically center the map at the user's position, and also to track the route of a user. Zooming in a mobile map is done by the touch functions "Pinch" or "Double Tap". And, well clear, the mobile application reacts when the user shifts the device horizontally or vertically and adapts the layout accordingly.