摘要
归纳了GIS中的一个设计模式———过滤和精化 ,并进行了描述 ,然后实现了该设计模式的一种变化 ,并测试了其效率和开销。旨在使GIS研究中更加注重设计模式 ,使GIS软件的开发更加规范化 ,提高软件开发效率。
Design pattern describes a problem which occurs once and again during the process of software development,and then describes the solution to that problem.Design pattern brings convenience to software reuse.In GIS software development,design pattern can be applied to improve the quality of software.In addition to that,design pattern also establishes a bridge between GIS research and software development.A software design pattern,filter and refine,which is widely used in spatial database design to improve the efficiency of spatial retrieval,was brought forward in this article.The pattern was described formally in detail,including its intent,motivation,applicability,structure and consequences,etc.Then a test is implemented to explain the consequences of the pattern.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第6期797-803,共7页
Acta Scientiarum Naturalium Universitatis Pekinensis
