基于开源技术的城市地理信息平台构建方法研究

Research on establishment of city geographic information platform based on open source technology

针对城市地理信息平台构建过程中存在的数据获取困难、研发成本较高等问题,引入开源技术,对基于开源数据、开源开发平台与开源工具的城市地理信息平台构建技术进行研究。所提出的城市地理信息平台由数据模块与可视化模块2部分组成。为构建数据模块,由开源地理信息项目(OSM)获取了建筑与区划数据,并设计了建筑合并算法以提升数据质量。建筑数据随之基于行政区划分级存储,通过由ASP.NET构建的数据接口提供给具体应用。可视化模块则基于开源地理信息系统(GIS)项目Cesium实现,并设计了完善的用户界面。以北京市为例,完成了原型系统的开发与测试,证实了该技术体系的可行性,通过开源技术降低平台研发成本,推进城市地理信息平台的研究与应用。

To solve the problems in the establishment of city geographic information platform including difficulty in data acquisition and high development cost,this paper introduced open source technologies,and proposed a platform establishment method based on open source data,open source tools and open source framework.The proposed platform consists of two parts,including the data module and the visualization module.In order to construct the data module,the open source geographic project open street map(OSM)was selected to obtain building and division data,and a building merging algorithm was designed to further improve data quality.The building data was then organized hierarchically based on administrative divisions and provided to specific applications through the data interface constructed by ASP.NET.The visualization module was implemented based on the open source geographic information system(GIS)project Cesium,and complete user interfaces were designed.Taking Beijing as an example,we carried out the development and testing of the prototype system,and confirmed the feasibility of the proposed technical route.The advantages of open source technologies were fully considered in this paper to reduce platform development costs and promote the research and application of city geographic information platform.