Currently, SZTS includes five representative benchmarks, stzod, hotregion and mapmatching are implemented by java, hotspot and secsort are implemented by Apache pig.
The sztod program computes how many moving objects start from point A and head for point B in a given time interval in the city
The hotregion program computes the distribution of people, cars, or other vehicles in Shenzhen within a given time interval.
mapmatching program is used to match the observed GPS trajectory with the route on a digital map.
hotspot analyzes the intensity of traffic flow (free or congested) to identify the traffic phases of each hotspots. In addition, hotspot contains a prediction model based on logistic regression to predict the future traffic flow intensities for a given hotspot.
In a metro application, secsort first sorts the records by smart-card record, then sorts by the primary time-stamp key, and finally sorts the records in each group by the secondary metro station.
There are three primary data sources in the Smart Urban Transportation System of Shenzhen.
(1)public bus transportation system
It produce GPS record data and smart card transaction data
(2)taxi transportation system
It produce GPS record data and deal transaction data
(3)subway transportation system
It produce smart card transaction data
each record has many fields, each field is described in szts documentation.
Shenzhen is a famous international city located in southern China. It covers 2000 square kilometers with a population of approximately 18 million. Shenzhen already built a modern urban transportation infrastructure including 5 subway lines with 118 stations, 936 bus lines, and 30,000 cabs. Each bus and cab is equipped with a GPS device. More detail information about SUTS are listed in table.