The document provides an overview of indoor positioning technologies and xDR (PDR & VDR) history at AIST. It includes:
1. A map of indoor positioning technologies categorized by capabilities like infrastructure requirements, mobile/stationary nodes, and ability to provide relative position.
2. A timeline of AIST's research in PDR and extending it to VDR, including world first achievements and applications in navigation, benchmarking, and challenges.
3. References on xDR/PDR/VDR research at AIST covering applications in augmented reality, navigation, mapping, service engineering, and more.