Table 1. Abbreviation table.

Abbreviation	Whole words
AR	Augmented Reality
BLE	Bluetooth low energy
PDR	Pedestrian dead reckoning
GIS	Geographic Information System
LBSs	Location-Based Services
3D GIS	3-Dimensional Geographical Information System
SFM	Structure from Motion
SLAM	Simultaneous Localization and Mapping
SIFT	Scale-Invariant Feature Transform
WaNAR	Walkability network-based Augmented Reality
DoF	Degrees of freedom
GPS	Global Positioning System
IMU	Inertial Measurement Unit
WKNN	Weight k-nearest neighbour
RSS	Received signal strength
PF	Particle filter
CDF	Cumulative Distribution Function