In order to render massive terrain data in real time, this paper presents an improved LOD algorithm.

为了实时地绘制大规模地形数据，提出了一种改进的实时连续LOD生成算法。

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The kernel of this paper is to discuss the key technology of publication and interactive browsing for massive terrain data.

完成了系统中语音数据和海量地图数据的存储、地图显示的优化、语音同步播报、后台通信服务等关键技术。

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Walkthrough in massive terrain and image data is a key technology and a difficult problem of GIS, VR and Digital Earth, etc.

海量地形影像数据的快速浏览是GIS、虚拟现实、数字地球等领域应用的关键技术与难点之一。

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So the Darfur crises does play a part in this, of course - particularly because this is an unmonitored massive piece of terrain, through which both of these rebel groups can move with relative freedom.

NPR: Chad's Capital Tense with Reports of Nearing Rebels

April's disappearance on 1 October led to a massive police search operation in and around Machynlleth, and over terrain including mountains, gorges, streams and waterfalls.

BBC: April's family at the balloon release