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 …

“Nature shows us only the tail of the lion. But I do not doubt that the lion belongs to it even
though he cannot at once reveal himself because of his enormous size.”–Albert Einstein The …

The importance of contextual information has been recognized by researchers and
practitioners in many disciplines, including e-commerce personalization, information …

Challenges and business models for mobile location-based services and advertising Page 1
121 communications of the acm | May 2011 | vol. 54 | no. 5 contributed articles Location-based …

The ubiquity of mobile devices with global positioning functionality (eg, GPS and AGPS) and
Internet connectivity (eg, 3G andWi-Fi) has resulted in widespread development of location …

This paper proposes a dead-reckoning (DR)/WiFi fingerprinting/magnetic matching (MM)
integration structure that uses off-the-shelf sensors in consumer portable devices and …

GPS devices allow recording the movement track of the moving object they are attached to.
This data typically consists of a stream of spatio-temporal (x, y, t) points. For application …

Nowadays, several location-based services (LBSs) allow their users to take advantage of
information from the Web about points of interest (POIs) such as cultural events or …

In light of the many improvements within 3D urban modeling and Location‐Based Services,
this article provides a timely review of the state‐of‐the‐art on integrating indoor and outdoor …