Bryan Roth had been hiking and scrambling for a while, with drop-offs evident around him, when his guides held out coveralls ...

Abstract: The most famous absolute self-positioning is GPS (Global Positioning System). However, GPS cannot be used in indoor and underground environments. Thus, relative positioning methods such as ...

Abstract: Recently, buildings in cities are becoming increasingly larger, resulting in more complex indoor environments. As a result, there is a demand for providing indoor Location-Based Services ...