Mapping personal trip OD from probe data
Mapping personal trip OD from probe data
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根据探测数据绘制个人行程 OD
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Kuwahara
中科院分区：
文献类型：
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作者：
E. Chung;M. Kuwahara
本文分析了具有固定误差的探针 OD 体积的预期值，误差与区域大小成正比，与区域大小成反比。为了增加分析的真实性，综合了东京都地区的真实旅行 OD。结果表明，对于平均半径为1.1km、固定测量误差为100m的小区域编码，预计精度可达70%。平均半径为 5km 的中等区域编码的等效精度将转化为大约 300m 的固定误差。正如预期的那样，小区域编码比中区域编码更敏感，因为探头误差包络落入相邻区域的机会更高。对于相同的误差半径，与区域大小成正比的误差将提供更高的精度。由于超过一半（54.8%）的行程终点在等效半径≤1.2公里的区域开始或结束，只有13%的行程终点发生在等效半径≥2.5公里的区域，因此与区域大小成正比的测量误差（例如手机）将提供更高的精度。具有不同探针误差特性的真实OD的合成表明，对于平均半径为1.1km的小区域编码，很难达到>85%的预期值。对于大多数传输应用，中等区域编码的 OD 矩阵足以进行传输管理。从这项研究中可以得出，误差范围在 2 到 5 m 之间的 GPS，在中等区域编码（平均半径为 5 km）时，将提供大于预期值 90% 的 OD 估计值。然而，对于中等区域编码的典型移动电话操作错误范围，预期值将低于 85%。本文假设从探头传输一个起始位置和一个目的地位置。然而，如果传输出发地和目的地区域内的多个位置，则可以执行与运输网络的地图匹配，这将大大提高探测数据的准确性。
The paper analyses the expected value of OD volumes from probe with fixed error, error that is proportional to zone size and inversely proportional to zone size. To add realism to the analysis, real trip ODs in the Tokyo Metropolitan Region are synthesised. The results show that for small zone coding with average radius of 1.1km, and fixed measurement error of 100m, an accuracy of 70% can be expected. The equivalent accuracy for medium zone coding with average radius of 5km would translate into a fixed error of approximately 300m. As expected small zone coding is more sensitive than medium zone coding as the chances of the probe error envelope falling into adjacent zones are higher. For the same error radii, error proportional to zone size would deliver higher level of accuracy. As over half (54.8%) of the trip ends start or end at zone with equivalent radius of ≤ 1.2 km and only 13% of trips ends occurred at zones with equivalent radius ≥2.5km, measurement error that is proportional to zone size such as mobile phone would deliver higher level of accuracy. The synthesis of real OD with different probe error characteristics have shown that expected value of >85% is difficult to achieve for small zone coding with average radius of 1.1km. For most transport applications, OD matrix at medium zone coding is sufficient for transport management. From this study it can be drawn that GPS with error range between 2 and 5m, and at medium zone coding (average radius of 5km) would provide OD estimates greater than 90% of the expected value. However, for a typical mobile phone operating error range at medium zone coding the expected value would be lower than 85%. This paper assumes transmission of one origin and one destination positions from the probe. However, if multiple positions within the origin and destination zones are transmitted, map matching to transport network could be performed and it would greatly improve the accuracy of the probe data.