摘要
考虑对变化的认知关系到时空模型驾驭变化信息的能力,而对于时空对象的变化采用定性的判断方法比较主观,不利于对时空变化信息的有效管理,该文提出了利用相似性理论对不同时期对象的变化程度进行定量描述的方法,通过计算不同时期对象间的相似度,判断对象属"量变"还是"质变"。该方法能够通过对地理实体变化程度的判断选择为对象建立一个新版本还是生成一个新对象,并能判断地理实体的变化类型,为时空信息的存储和时空变化过程的跟踪提供依据。
Considering change cognition is relative to the ability of dealing with spatio-temporal information for model,utilizing qualitative change information about a sptio-temporal objects to distinguish the change degree is subjective,and lack of effective ability for managing the change information,a method is proposed to express change degree quantitatively by utilizing similarity theory in this paper.By computing the similarity degree value between objects in different periods,we can judge weather the change is a′quantitative change′ or a′qualitative change′,and in the method,combing the similarity elements computed in the system,spatial change type of an object can be recognized,and the kindred of an object are distinguished if it occurs a qualitative change.By the method,it is can be chosen to build a new version for an object or to store it as a new object in database by the change degree of a geographical entity.The change type can be confirmed,which is the foundation of storing spatio-temporal object and tracking spatio-temporal process
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2010年第3期1-5,共5页
Geography and Geo-Information Science
关键词
相似度
时空模型
量变
质变
similarity degree
spatio-temporal model
quantitative change
qualitative change
作者简介
夏慧琼（1976-），女，博士，从事TGIS、时空数据挖掘和可视化等方面的研究。E—mail：xhqiong2003@163．com
