Abstract
Abstract. Indoor positioning technologies are being developed rapidly, and seamless positioning which connected indoor and outdoor space is a new trend. The indoor and outdoor positioning are not applying the same coordinate system and different indoor positioning scenes uses different indoor local coordinate reference systems. A specific and unified coordinate reference frame is needed as the space basis and premise in seamless positioning application. Trajectory analysis of indoor and outdoor integration also requires a uniform coordinate reference. However, the coordinate reference frame in seamless positioning which can applied to various complex scenarios is lacking of research for a long time. In this paper, we proposed a universal coordinate reference frame in indoor/outdoor seamless positioning. The research focus on analysis and classify the indoor positioning scenes and put forward the coordinate reference system establishment and coordinate transformation methods in each scene. And, through some experiments, the calibration method feasibility was verified.
Highlights
A variety of indoor positioning technologies are being developed rapidly in nowadays, such as Wi-Fi, Bluetooth, and UWB, which are used in hospitals, shopping malls, warehouses, underground car parks and other places (Song et al, 2011)
The connection of indoor and outdoor spaces is an important requirement for seamless positioning, and it needs to unify the coordinate reference system for both indoor and outdoor spaces
A specific and practical coordinate reference frame in seamless positioning is lacking of research for a long time
Summary
A variety of indoor positioning technologies are being developed rapidly in nowadays, such as Wi-Fi, Bluetooth, and UWB, which are used in hospitals, shopping malls, warehouses, underground car parks and other places (Song et al, 2011). The connection of indoor and outdoor spaces is an important requirement for seamless positioning, and it needs to unify the coordinate reference system for both indoor and outdoor spaces. A suitable location such as a corner of a building can be selected as the origin point (O) for an indoor local coordinate reference system. The anchor node element contains attributes about external reference and conversion parameters (rotation origin point, rotation angles, rescaling factors and translation vector) to support the seamless conversion between indoor and outdoor spaces. After analyzing and classifying different indoor space, this paper proposes a method to establish the indoor positioning coordinate reference system, and the indoor and outdoor coordinates conversion method is provided. Some specific buildings are selected to test and verify the the proposed method
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