Mobile navigation system

The invention relates to, at a wireless communications system, from a service server continuously update position data and data related to information objects related to an indicated geographical district. Position data and information objects are shown preferably on a map on a display unit at a mobile terminal. The information objects contain geo-codes, which indicate where on the map the object shall be shown, an icon, and a reference to supplementing information related to the navigation point. In order to limit the need of storing and transmission, the icon is not transmitted, but instead an address to a storing place in Internet, or other computer network, where the icon is accessible. The icons therefore can be anywhere in the network and can be owned by anyone. The icons can be clicked on and refer to web pages where supplementing information related to the navigation point can be derived by ordinary HTTP-protocol.