The increasing use of location-aware devices has led to an increasing availability of
trajectory data. As a result, researchers devoted their efforts to developing analysis methods …

This paper surveys indoor spatial models developed for research fields ranging from mobile
robot mapping, to indoor location-based services (LBS), and most recently to context-aware …

Common queries regarding information processing in ubiquitous computing are based on
the location of physical objects. No matter whether it is the next printer, next restaurant, or a …

This paper examines location-based services (LBS) from a broad perspective involving
definitions, characteristics, and application prospects. We present an overview of LBS …

In the past decade, the smart phone evolution has accelerated the proliferation of the mobile
Internet and spurred a new wave of mobile applications, leading to an unprecedented …

With the recent progress in indoor spatial data modeling, indoor mapping and indoor
positioning technologies, several spatial information services for indoor spaces have been …

In recent years, we have witnessed a flourishing of location-based social networks. A well-
formed representation of location knowledge is desired to cater to the need of location …

In this article we propose a hybrid spatial model for indoor environments. The model
consists of hierarchically structured graphs with typed edges and nodes. The model is hybrid …

In this paper we present a new conceptual model of trajectories, which accounts for
semantic and indoor space information and supports the design and implementation of …

Location-based mobile services have been in use, and studied, for a long time. With the
proliferation of wireless networking technologies, users are mostly interested in advanced …