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近年来,公共安全事件不断发生,如何科学地应对和及时妥善地处理突发事件是我国乃至全球必须面对的一个课题。而应急三维DEM可视化平台为这一课题提供了有效的解决途径。DEM数据作为空间数据中基础数据之一,但最新Lidar获取的局部数据,其数据量之大,无法快速地浏览与显示。针对于此,本文设计出DEM数据压缩方案,利用SevenZip结合Int5/3小波+SPHIT编码对其进行压缩,利用C#语言编程实现了该方案,并验证了该压缩方案的可行性及良好性。 更多还原

【Abstract】 In recent years,as the incidents of the public safety frequently occur,how to reply scientifically and deal with the emergencies timely and proper has aroused wide concern in our country even all over the world.Luckily the research topic "3D DEM visualization platform of the emergency" provides an effective solution to this problem.DEM is one of the basic spatial data,however,the latest technology of the Lidar can obtain vast local data,but hardly to browse and display speedily.In light of this,... 更多还原