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A Data model for managing GPS travel time data

机译:用于管理GPS行程时间数据的数据模型

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Travel time studies are widely used to document congestion and to quantify the impact of highway improvements. Global positioning system (GPS) receivers can be used to survey the location of landmarks and to automatically record the speed and location of probe vehicles. However, GPS receivers record location in latitude, longitude pairs. They also tend to produce files having huge numbers of records, particularly if data is collected at short intervals, say every one second. In order to access this data it is necessary to store all GPS pint data in a database and provide a linear reference to each GPS point. This paper describes a data model that can be used to map GPS travel time data to a GPS-based highway network. The data model includes a general spatial model, an appropriate geographic relational database schema, and a procedure for linearly rferencing the GPS data. The paper also discusses data reporting procedures.
机译:行驶时间研究被广泛用于记录交通拥堵并量化高速公路改善的影响。全球定位系统(GPS)接收器可用于调查地标位置并自动记录探测车的速度和位置。但是,GPS接收器以纬度,经度对记录位置。他们还倾向于产生具有大量记录的文件,特别是如果数据收集间隔很短,例如每秒一次。为了访问此数据,必须将所有GPS品脱数据存储在数据库中,并为每个GPS点提供线性参考。本文介绍了一种可用于将GPS行驶时间数据映射到基于GPS的公路网的数据模型。数据模型包括一般的空间模型,适当的地理关系数据库方案以及线性引用GPS数据的过程。本文还讨论了数据报告程序。

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