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Visualising trips and travel characteristics from GPS data

机译：通过GPS数据可视化行程和旅行特征

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In the past three years, a number of attempts have been made to use Global Positioning System (GPS) devices to measure elements of person travel that have never been successfully measured by conventional interview and self-administered surveys. A key component of this application of GPS devices is to process the track points recorded, so as to produce maps and other visual representations of the travel conducted with the device. These maps and other visualisations of the travel are subsequently used in a prompted recall survey, to obtain additional data about the travel that cannot be measured by the GPS devices, such as travel purposes, number in the travelling party, and costs associated with the travel. Determining what constitutes a trip, and processing the data to produce a recognizable map of the travel is essential to the success of a prompted recall survey. In turn, the use of this type of survey avoids the need for survey subjects to enter data in a diary or electronic device during the travel - a task that is both burdensome and likely to be forgotten or omitted sufficiently often to negate most of the benefits of a GPS survey. This paper describes the use of the GPS devices in this type of survey, the paradigms used to convert the track points to coherent trips, examination and correction of the visualised travel, and methods used to prepare maps and other visual tools, which can be presented to subjects in a prompted recall survey. Methods to display the trips and other information that can be gained from alternative ways of presenting the data are also outlined in the paper. These include the ability to determine when a person travels in congested conditions, examination of delays at traffic lights and other controlled intersections, and identification of the locations of acceleration and deceleration episodes.
机译：在过去的三年中，已经进行了许多尝试来使用全球定位系统（GPS）设备来测量人员出行的元素，而这些元素从未通过常规面试和自我管理的调查成功地进行了测量。 GPS设备此应用程序的关键组成部分是处理记录的轨迹点，以便生成地图和使用该设备进行的旅行的其他视觉表示。这些地图和旅行的其他可视化结果随后用于提示召回调查中，以获取GPS设备无法测量的关于旅行的其他数据，例如旅行目的，旅行方的人数以及与旅行相关的费用。确定提示旅行的内容，并处理数据以生成可识别的旅行地图对于成功进行召回调查至关重要。反过来，使用这种类型的调查可以避免调查对象在旅途中在日记本或电子设备中输入数据-这一任务既繁琐又可能被经常遗忘或忽略，以抵消大部分收益GPS测量。本文介绍了此类调查中GPS设备的使用，将航迹点转换为连贯行程的范例，可视化旅行的检查和更正以及准备地图和其他可视工具的方法提示召回调查中的对象。本文还概述了显示行程和其他信息的方法，这些方法可以从表示数据的其他方式中获得。这些功能包括确定人何时在拥挤的条件下旅行，检查交通信号灯和其他受控路口的延误以及识别加速和减速事件的位置的能力。

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