基于等高线渲染法的克里金插值展示技术

目前，空间数据在Web端的表达方式存在网络传输数据量大、插件依赖性强、交互性较差等问题。为了减轻浏览器承载的压力、快速高效地实现空间数据在Web端的可视化表达，本文设计了一种基于等高线渲染法的克里金插值展示技术：在克里金插值算法和等高线渲染法的支持下，用户在Web端通过“框选”工具选择采样点区域，其中采样点数据被传输到服务端进行处理生成插值结果，并返回到Web端进行快速渲染。此技术成功应用在柑橘信息管理系统中，结果表明克里金插值结果的成图时间有效缩短，且Web端的交互性显著增强。

A Technology of Displaying Kriging Interpolation Based on Contour Rendering Method

At present, the expression of spatial data on the Web exposes some problems, such as large amount of data transmitted by the network, strong dependency of plug- ins and poor interactivity. To reduce the pressure of the browser and complete the visualization of spatial data on the Web quickly and efficiently, the paper proposed a technique displaying Kriging interpolation results based on the contour rendering method: with the support of Kriging interpolation algorithm and contour rendering method, the user selected the area within sample points through the“frame selection”tool on the Web, where the data of sample points was transmitted to the server for processing to generate interpolation results, then the results were rendered fleetly on the Web. The technique was applied in citrus information management system successfully, which indicated that the time of Kriging interpolation results displaying on the map was shortened effectively and the interactivity of the Web was enhanced significantly.