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一个从基于位置相关服务而收集的零星位置点中获取连续车辆轨迹的方法(英文) 总被引：1，自引：1，他引：0
The paper proposes an economical and fast algorithm for deriving trajectories from sporadic tracking points collected in location-based
services (LBS). Although many traffic studies or applications can benefit from the derived trajectories, the sporadic tracking
points are always implicitly overlooked by most of existing map-matching algorithms. The algorithm proposed in this paper
finds network paths or trajectories traveled by vehicles through augmenting GPS data with odometer data. An odometer can provide
data of traveled distance which are compared with the lengths of candidate network paths in order to find the most approximate
network path approaching the trajectory of a vehicle. Tracking points are classified into anchor points and non-anchor points.
The former are used to divide trajectories, and the latter screen candidate network paths. An elliptic selection zone and
a reduction process are applied to the selection of possible road segments composing candidate network paths. A brute-force
searching algorithm is developed to find candidate network paths and calculate their lengths. A two-step screening process
is designed to select the final result from candidate network paths. Finally, a series of experiments are conducted to validate
the proposed algorithm.
Supported by the National Natural Science Foundation of China (No.40701142), the Scientific Research Starting Foundation for
Returned Overseas Chinese Scholars, Ministry of Education, China. 相似文献
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应用分形几何的原理,采用数盒维法计算了西藏地区（Ｄ＝１７８４）及其内部羌塘（Ｄ＝１２１７）、比如盆地西部（Ｄ＝１２２７）、措勤（Ｄ＝１２９７）三个油气勘探区和三江金属矿产勘探区（Ｄ＝１８２０）的断裂分维值。分别与四川盆地含油气区、江西德兴和湘中金属矿产区的断裂分维值比较,发现含油气区的断裂分维值大致介于１＜Ｄ＜１２４,明显低于整个区域断裂分维值,Ｄ值越小,越有利于油气成藏;金属矿产区Ｄ＞１．８０左右,大于整个区域分维质,Ｄ值越大,矿床规模越大。此预测了羌塘、比如盆地西部具备含油气区的构造条件,三江地区的构造情况利于形成大规模金属矿床。 相似文献
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