Abstract: A method in a processing apparatus includes: obtaining measurement data generated by one or more information sources; selecting one or more parts of a map; and processing the measurement data with a state estimation algorithm within the confines of the selected one or more parts in order to determine an estimated state of a mobile apparatus.

Abstract: A processing apparatus is caused to: 1) obtain measurement data generated by a mobile apparatus with one or more sensors during a known time period, the measurement data including a plurality of measurement samples and timing data indicating timing of measurement samples in relation to each other; 2) obtain at least one event related to the mobile apparatus, the event being associated with the measurement data so that it represents a specific time and/or a specific location during the known time period; 3) construct a spatial path of the mobile apparatus based on at least a part of the measurement data and the at least one event; and 4) associate the measurement data with the spatial path so that a measurement sample is associated with a specific point of the spatial path.

Abstract: A method an arrangement to reduce amount data to be sent in a tracking system of a mobile station (MTT) having a positioning device to obtain positioning data, and the mobile station (MTT) and the server (S) perform the following steps: the mobile station (MTT) sends its dynamic state parameters including at least the position and velocity, which are derived from the positioning measurements, to server (S), the mobile station (MTT) computes an error criterion based on said sent dynamic state and current dynamic state, which is derived from new positioning measurements, such that the error criterion is calculated based on at least sent and current velocities, the mobile station (MTT) sends a set of new dynamic state parameters, when the said error criterion is over a predefined limit.