The SPM methods and experiments were developed in Estonia by Positium and Institute of Geography University of Tartu during 2003-2006.
[1] The biggest advantage of mobile positioning-based methods is that mobile phones are widespread, positioning works inside buildings, and collection of movement data is done by a third party at regular intervals.
The most important problems of SPM are related to data security, as well as concerns about non-authorized personal surveillance.
These problems can be solved with further development of location-based services (LBS) and relevant legal and organisational regulation.
Today mobile positioning can be applied only by obtaining participants’ personal acceptance.