面向对象的基态修正模型改进及查询方法

Improved Base State with Amendments Model Based on the Object-Oriented

空间和属性随时间变化规律的研究是时态GIS核心问题。引入面向对象方法,把地理实体抽象成为具有空间、属性和时间特性的空间对象,以空间对象的变化状态为基础,探讨了地理实体时空信息连续变化对基态修正模型的影响。通过引入基态距影响因子研究了基态修正模型改进方法,重点研究了基于面向对象基态修正模型的基态距确定、基态的建立过程和模型的存储;并具体设计了基于时间点和时间段的查询方法,为空间对象的时空数据存储、查询和历史回溯提供了基础。

The study of variation changes with time of space and attribute is the core problem of TGIS. The object-oriented method was introduced, geographical entities were abstracted into spatial objects with the feature of spatial, attribute and time. The influence of base state amendment model which cased by the continuous change of space time information of geographic entities was discussed based on the variation status of spatial objects. By introducing the influential factor of base state distance, the storage of ensurance of base state dis tance, the founding process of base state and the storage of the model were mainly studied based on the base state amendment model of objectriented. The query method was specificly designed based on the time point and time slot. The foundation of space time storage, query and history recall of spatial object was provided.