大规模地形数据实时绘制的技术研究  

Research on Real-time Rendering of Large-scale Terrain Data

作　　者：田珊珊 王慧青[1] 张小国[1] 

机构地区：[1]东南大学仪器科学与工程学院

出　　处：《控制工程》2018年第2期224-230,共7页Control Engineering of China

基　　金：低丘缓坡山地开发土地规划与监管技术和示范(201311001)

摘　　要：如何对地形数据进行有效的组织、存储和调度,以实现大规模三维场景的快速和高质量显示,是三维GIS研究的热点之一。针对常规方式构建金字塔模型存在的问题,提出了一种改进的基于数据库的数据组织与存储方法,即以影像数据为出发点来组织数据,用存储记录实际高度与宽度的方法来减少空间占用;绘制时通过设立缓冲区及使用多线程技术,最终实现了大规模三维地形的快速调度与流畅显示。How to organize, store and schedule the terrain data effectively and to realize the fast and high quality display of large-scale 3D scenes is one of the focuses of the 3D GIS research. Aiming at the problem of constructing the pyramid model in the conventional way, an improved database-based data organization and storage method is proposed, namely using the image data as a starting point to organize the data, using the method of recording the actual height and width to reduce space occupation; When drawn by setting up the buffer and using the multi-threading technology, the rapid scheduling and smooth display of large-scale 3D terrain is finally realized.

关 键 词：大规模 数据库 组织 存储 调度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]