Research And Application On Oilfield GIS Spatial Data Integration Based On GML

With the development of Geographic Information System,PetroChina has successively introduced a number of GIS software systems,also set up the data models of oilfield space for different aspects.These spatial models face different professions, and depends on the specific support platform and operating environment.Being separated and relatively closed with each other,These models are unable to communicate and collaborate,consequently,spatia information islands forms,for which it is difficult to achieve the spatial data sharing and interoperability.From the perspective of spatial data sharing, the problem of different data formats among systems has become urgent in the efficient usage of data resource.While from the perspective of data integration,with the further development of GIS from enterprise to socialization,the completion of GIS applications needs integrate multiple data sources and different formats of data.During an application,users can operate and access a multi-source heterogeneous database like a normal one without taking database type nor physical location of data storage into account.With the reserchment of specification,construction, GIS-related technologies and a great deal of metadata theory on GML of the open GIS Alliance, and combines with the existence of various GIS spatial data models existing in PetroChina industry,this paper makes an deep analysis on the current oilfield GIS spatial model,builts a GML-based multi-source model to integrate heterogeneous spatial data,and defines a structure of system integration framework.It can provide users with a unified,transparent spatial data access interfaces and construct a user-transparent data collection to support the flexible exchange and sharing of various spatial data sources in the global application of heterogeneous spatial data, also give a solution on the issue of accessing map's services based on multi-source heterogeneous GIS spatial data by using Web Services technology.Finally,this paper achieves a high-quality map-showing system based on the proposed integration framework model,GML model,fusion of SVG,and other technologies, which displays a unified WebGIS Map.In order to accelerate the speed of map's loading,a DODL algorithm is proposed,it reduces the consumption of the server-side resources and saves system startup time and resources considerably, meanwhile improves the performance of the system.This proposed integration of GML framework and unified exchange model,laid the foundation for the integration of spatial data in future Petro industry.