基于ArcSDE/SVG的分布式WebGIS模型*

根据油田对WebGIS的应用需求，对油田空间对象及其属性数据以及对象间的关系进行分析的基础上，结合当前流行的ArcSDE空间模型中的数据组织技术，构建了一个能够将全域空间模型与分布于异地的空间模型实现统一的分布式WebGIS模型。通过这一模型实现对各种复杂空间对象GIS信息的存储,并采用ArcSDE技术实现了客户端与GIS服务器端的数据通信，客户端采用SVG技术实现图层管理和分布在不同区域地图的展示。基于这一体系模型，结合油田的实际需求，采用元数据驱动技术构建了油田WebGIS平台的元模型，最后对其进行了

Distributed WebGIS model based on ArcSDE and SVG

Based on the analysis of the oilfield space objects and their attributes data, as well as the relationship between the objects, and combining with the data organization technique which was popular in ArcSDE spatial model currently, this paper proposed a distributed WebGIS model, which could unify the global space model and the local space models distributed on different regions. Using this distributed WebGIS model, GIS information about any kind of complex spatial object could be stored, data communication between client and GIS server could be carried out with the ArcSDE technique, and geographic coverages which were distributed on different regions could be displayed and managed in a global view window by SVG technique in the client. Based on this system model, this paper constructed the oil WebGIS platform model using metadata-driven technology to meet the actual demands of oil. Finally, implemented the distributed WebGIS platform. Currently, the platform has already been applied in Daqing oilfield.