TsingNUS: A Location-Based Service System Towards Live City
Location-base service is an indispensible task for Live City of NExT.
To provide users with more user-friendly location-aware search
experiences, we develop a location-based service system towards live
city, called TsingNUS. TsingNUS has the following unique features.
We extract location-based structure information from
user-generated content (UGC) to enrich the traditional points of
interest (POIs), which not only generates many new POIs but also
provides users with more detailed structure information.
We develop user-friendly interfaces to improve user experiences,
including location-aware search-as-you-type, direction-aware search,
and voice search. Location-aware search-as-you-type returns answers as
users type in queries letter-by-letter which can reduce users' typing
effort. Direction-aware search can efficiently compute answers in a
specific direction, which has many real-world applications, e.g.,
searching while driving on a highway or walking on the way to a
We devise efficient indexing structures and algorithms to support
continuously moving queries, which can reduce the communication cost
between mobile clients and server and ease the server burden when
users continuously issue queries (e.g., driving or walking).