Abstract: To obtain a person’s location information with high accuracy using mobile devices, it is
necessary for a mobile device to switch its localization method depending on whether the user is
indoors or outdoors. We propose a method to determine indoor and outdoor location using only the
sensors on a mobile device. To obtain a decision with high accuracy for many devices, the method
must consider individual differences between devices. We confirmed that using a majority decision
method reduces the influence of individual device difference. Moreover, for highly accurate decisions in various environments, it is necessary to consider the differences in environments, such as large cities surrounded by high-rise buildings versus suburban areas. We measured classification features in different environments; the accuracy of the classifier constructed using these features was 99.6%.

Keywords: GPS, Wi-Fi, Localization, Mobile Device