Demonstration of the TrajStore system

The proliferation of GPS devices has led to a substantial interest in location based services. In particular, modern vehicles can generate an incredible amount of drive data. However, current storage systems are not optimized for storing and querying such large spatial-temporal data sets. In this demonstration, we show the performance of the TrajStore system, a dynamic storage system optimized for quickly accessing data in a particular spatial-temporal region. In particular, TrajStore uses a novel adaptive indexing technique that dynamically adjusts itself to co-locate spatially close trajectories on disk, as well as a number of compression techniques in the storage layer that significantly reduce access time for a given index cell. In this demonstration, we will store a set of real world taxi cab drive traces in TrajStore, and users will be able to query the data through a map based interface.