基于WebGIS的地下管网在线编辑系统的实现
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摘要
为实现基于Web GIS对地下管网数据进行动态更新,并对数据的拓扑关系进行维护,建立了基于元数据面向实体的管网模型并提出了基于客户端缓存的要素捕捉方法。专业管网元数据与管网GIS模型相结合,元数据用于描述各专业管网的特性,管网GIS模型存储空间要素和空间拓扑,管网模型用关系型数据库进行存储,客户端通过标准服务接口对数据进行维护,结合要素捕捉提高编辑的准确性。通过建立实例系统对研究成果进行了验证,实现了对数据进行快速有效的更改和处理。
In order to realize the dynamic updating of the data of the underground pipe net based on Web GIS and to maintain the topological relation of the data,this paper established network model based on metadata entity oriented and proposed the method of capturing elements based on client cache. Professional network metadata combined with pipeline GIS model,metadata storages elements and spatial topology. The metadata is used to describe the professional characteristics of the network,and the Pipe Net GIS model storage spatial elements and spatial topologies. The pipe network model is stored in a relational database,the client maintains the data through the standard service interface,and then combining elements of capture to improve the accuracy of editing. Through the establishment of an example system to verify the results of the study,and achieve the data quickly and effectively change.
In order to realize the dynamic updating of the data of the underground pipe net based on Web GIS and to maintain the topological relation of the data,this paper established network model based on metadata entity oriented and proposed the method of capturing elements based on client cache. Professional network metadata combined with pipeline GIS model,metadata storages elements and spatial topology. The metadata is used to describe the professional characteristics of the network,and the Pipe Net GIS model storage spatial elements and spatial topologies. The pipe network model is stored in a relational database,the client maintains the data through the standard service interface,and then combining elements of capture to improve the accuracy of editing. Through the establishment of an example system to verify the results of the study,and achieve the data quickly and effectively change.
引文
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[2]何屹.基于Web分类技术的农业信息获取系统的研究与实现[D].北京邮电大学,2010.
[3]程小凯,李恺毅,李景文等.面向对象的城市管网数据组织模型设计[J].地理空间信息.2010(02):127~129.
[4]卢丹.地下管网地理信息系统通用模型的设计与实现[D].哈尔滨:哈尔滨工程大学,2003.
[5]杨志波.基于Ajax技术的Web GIS研究及实现[D].中国科学院广州地球化学研究所,2006.
[6]彭建伟.Ajax技术在Web GIS中的应用研究[D].长沙:中南大学,2008.
[7]李浩松,朱欣焰,李京伟等.Web GIS空间数据分布式缓存技术研究[J].武汉大学学报·信息科学版,2005,30(12):1092~1095.
[8]吴磊,黄先锋,舒宁.GIS大数据量编辑处理中快速捕捉的优化策略[J].武汉理工大学学报·交通科学与工程版,2005,29(2):315~318.