Cesium框架多源电子地图瓦片数据混搭方案设计  

Multi-source digital map tile data mashup scheme design based on Cesium

作　　者：范俊甫[1,2] 胡桃英 何惠馨[1] 秦柳 李桂华 FAN Junfu;HU Taoying;HE Huixin;QIN Liu;LI Guihua(School of Civil and Architectural Engineering,Shandong University of Technology,Zibo 255049,China;State Key Laboratory of Resources and Environmental Information System,Institute of Geographic and Nature Resources Research,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]山东理工大学建筑工程学院,淄博255049 [2]中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室,北京100101

出　　处：《遥感学报》2019年第4期695-705,共11页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学基金(编号:41501425,41601478,41471330);国家重点研发计划(编号:2017YFB0503500);山东省重点研发计划(编号:2016GSF122006);山东省高等学校科技计划(编号:J16LH03);山东理工大学青年教师发展支持计划(编号:4072-115016)~~

摘　　要：针对现有的商业地理信息系统平台难以灵活整合多源影像数据融合使用的问题,深入研究Cesium平台下多种数据源的空间参考差异和瓦片组织规则,针对不同空间参考的瓦片数据源进行混搭设计,提出基于Cesium的多源本地瓦片数据静态和动态加载方案。实验结果表明,单一瓦片数据源加载方案、静态和动态多源瓦片混搭方案的展示效果较好;静态瓦片混搭方案在加载不同空间参考瓦片数据时容易造成变形;动态多源、多空间参考瓦片混搭方案能有效克服变形问题且展示效果佳。本文实现了在开源GIS平台下的多源影像数据的融合使用,为地理信息系统与遥感类项目应用提供了一个低成本、高灵活性的解决方案,具有较为明显的实际应用价值。Developments and customizations based on open source software have lower costs and higher flexibilities than the large-scale,high-cost, and high-complexity routine maintenance of commercial geographic information system(GIS) platforms that is limited by the function of the system. An increasing number of GIS applications are migrating from commercial platforms to open source GIS platform frameworks. The open source GIS platform facilitates the application of GIS and promotes the rapid development of spatial data management and processing technologies. However, developers may still face the challenge of scenarios of integration or mashup applications of tile datasets from multiple digital map sources in many GIS projects. Therefore, the data source of the base map based on the open source GIS platform must be increased to extend the space and time coverage of the base map in the study area.Cesium is an open source 3 D map engine developed based on the Web Graphics Library with various characteristics, such as cross-platform, cross-browser, 2 D/3 D integration, and dynamic geospatial data visualization. This library offers a flexible and efficiency base map customization environment for WebGIS applications with low costs. Cesium provides access and loading support for two mainstream spatial references: WGS84 and Web Mercator coordinate systems. On the basis of these considerations, we comprehensively examined the tile data organization mechanisms and spatial reference differences of the Cesium platform and various tile data sources, such as Google maps,Tianditu, and Bing maps. Two types of tile data loading schemes, namely, static and dynamic loading, were designed for the mashup of multi-source tiles with different spatial references.(1) Experiment involving the single data source tile loading scheme illustrated that single data source tiles could be loaded successfully by the two image services, and the create Tile Map Service Imagery Provider image service was suitable as a choice of single data source tile load

关 键 词：遥感 CESIUM 电子地图 空间数据组织 瓦片混搭 本地化部署 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P283.7[天文地球—测绘科学与技术]