Techniques are provided which may be implemented using various methods and/or apparatuses for use in providing positioning assistance data to mobile stations. For example, a method in a first server in a cellular network may comprise sending a request for location information to a mobile station. A request for assistance data indicating an address of a second server may be received from the mobile station. Based on this address, a request for local mapping data may be sent to the second server. The local mapping data may be received from the second server. The assistance data based on the local mapping data and identifying a wireless signal transmitter may be sent to the mobile station. The location information, based on the assistance data and on a positioning operation based on a wireless signal transmitted by the identified wireless signal transmitter may be received from the mobile station.