Intelligent buildings are among the most active Internet-of-Things (IoT) verticals,
encompassing various IoT-enabled devices and sensing technologies for digital …

In spatial databases, there are two basic types of queries, namely nearest neighbour queries
(kNN) and range queries. Spatial range queries are not only finding objects of interest within …

A virtual reality GIS analysis platform based on spatial query is proposed in this paper. The
proposed platform serves 3D digital city and supports integrated VRGIS functions including …

Continuous location-dependent queries are key elements for the development of location-
based and context-aware services. While most work on location-dependent query …

Researchers have proven that most individuals spend most of their lives indoors. With the
current appropriate indoor positioning devices such as Bluetooth and RFID, WIFI, the …

Routing systems for outdoor space have become the focus of many research works. Such
routing systems are based on spatial road networks where moving objects (such as cars) …

Routing system has been implemented in the outdoor routing and the indoor routing. There
are significant differences that make indoor routing is more complex than outdoor routing …

With the emergence of various types of indoor positioning technologies (eg, radio-frequency
identification, Wi-Fi, and iBeacon), how to rapidly retrieve indoor cells and moving objects …

With the increasing popularity of indoor positioning system technologies, many applications
have become available that allow moving objects to be monitored and queried on the basis …

Purpose With the rapid development of the indoor spaces positioning technologies such as
the radio-frequency identification (RFID), Bluetooth and WI-FI, the locations of indoor spatial …