REALIZATION OF INDOOR POSITIONING IN SPARROW STEPS
The task of determining the location inside the building is reduced to determining the distance to some of its objects, the location of which is known. Solving this problem may require information about the environment, for example, the values of the geomagnetic field, and information about the peculiarities of motion - speed and acceleration, direction of motion, etc. All such information, as noted in [1], is capable of forming inertial sensors and environmental sensors embedded in a modern Apple smartphone. The current location determination model implemented in the iOS application Sparrow Steps assumes the acquisition of primary information from the smartphone's sensors, its processing and subsequent use in multi particle filters (MPF). This article describes the main stages of calculating the location, implemented in Sparrow Steps.