桂林市电子沙盘设计及其功能

Design and Function of Guilin Electric Sand Table

桂林市电子沙盘的开发采用了 3S技术、多媒体技术和数字化技术 ,它以数字化的地形图为基础数据源 ,建立数字高程模型 ;以卫星遥感数字图像为三维景观的表层粘模。电子沙盘具有二维平面—三维立体图对照显示 ,任意调整观察的位置、高度、方位、视角等功能 ,并可以按预设的路线在空中模拟飞行观察 ,给人亲临其境的感觉。同时 ,它具有绘制剖面、求算任意区域地表面积和土石方量 (水库库容 )等功能 ,突破传统沙盘的概念。

S technique, Multimedia technique and digital technique, which are the advanced techniques all over the world by now, were adopted in the development of Guilin Electric Sand Table The digital topographic map was used as the key data source to set up the digital elevation model, and the satellite remote sensing images as the covering surface of strero-landscape The Electric Sand Table possesses many new functions, such as 3D-stereo picture can be displayed against 2D-plane map ,the observing position, altitude, direction and angle of view, et c can be regulated arbitarily Furthermore, people can take a simulated flight up the sky following the scheduled arbitrary road to get a bird's-eye view, as if you are on the spot personally Moreover, the Electric Sand Table possesses the functions of drawing the sectional map of topography, calculating the surface area of arbitrary region, calculating the cubic meter of earth & stone and storage of reservoir, et c It breaks through the original conception and function of traditional material sand table