科学考察空间数据WebGIS信息发布及可视化研究

摘要

为有效共享科学考察第一手数据资料,结合考察采样及调查数据的时空特性,采用WebGIS及RIA Flex等最新网络及可视化技术,提出一种在线发布科考空间信息的系统框架,实现多元科学考察数据基于WebGIS的空间信息发布与可视化表达.基于J2EE架构设计与实现多元科考空间数据的统一访问Web服务接口,完成空间数据内容的统一读取与浏览.调用相应Web服务,利用WebGIS技术生成考察数据内容对应的空间点图层,将属性数据与空间点关联设置后,引入Flex全新表示层方案,实现对科考数据的网络发布及统计与空间插值等可视化分析.通过此系统框架,将研究成果应用于“中国北方及其毗邻地区综合科学考察”科技基础性工作专项项目,应用效果良好,极大地提升考察数据的使用价值与效率.%A WebGIS system is presented to publish and visualize geo-spatial data collected during scientific expedition, with the WebGIS and Flex visualization technology, just for enhancing the sharing capability of the survey data. Firstly, data access service is developed for reading and browsing multi-source geo-spatial data in the form of online electronic table. Secondly, spatial point layer is created using GIS function on the web. Flex technology is introduced to complete statistical and interpolation analysis for the attribute data of spatial points. Finally, the system is used in the project named "North Eastern Joint Scientific Exploration and Cooperative Research". The results show that online publishing and visualization functions enhance the value and use efficiency of the geo-spatial data and are worth of spreading.