Indoor Map Construction Method Based on Geomagnetic Signals and Smartphones

Abstract

Indoor map construction techniques based on geomagnetic signals can achieve better effects for constructing indoor maps, because indoor geomagnetic signals are uniquely representative. An Indoor Map Construction Method based on Geomagnetic Signals and Smartphones (IMC-GSS) is proposed. The magnetic trajectory data are collected through smartphones and crowdsourcing technology, the Dynamic Time Warping (DTW) is utilized to cluster the obtained magnetic trajectory data, and the trajectory fusion technology based on the affinity propagation algorithm is applied to fuse the trajectories belonging to the same cluster in the magnetic trajectory domain to obtain a relatively accurate indoor path. The experimental results show that constructed indoor fingerprint map is reliable as well as effective.