Key issues on multi-resolution representation and real-time simplification algorithms of multi-resolution of terrain model are then studied, which are simplification algorithms of dem, relativity calculation, off-line calculation, region division calculation, visibility calculation depending on fov ( field of view ) and error control, and real-time reality rendering . the simplification algorithms of self-adaptive triangulation regular networks and hierarchical triangulation irregular networks basically depending on fov are thoroughly studied . in the end, based on theories and methods discussed in this paper, a gis platform named hypergis and hyperterrain of terrain visualization software are developed and implemented 并以jarnopeschie的算法為基礎(chǔ),全面研究了路網(wǎng)的自動綜合算法通過分析研究多分辨率地形表現(xiàn)模型和實(shí)時(shí)地形簡化應(yīng)解決的關(guān)鍵技術(shù)問題,進(jìn)一步研究了規(guī)則三角形網(wǎng)和顧及地面特征點(diǎn)線的不規(guī)則三角形依賴于視點(diǎn)的多分辨率地形模型簡化算法;應(yīng)用研究所取得的理論和方法,開發(fā)了系統(tǒng)實(shí)現(xiàn)模擬軟件hypergis和hyperterrain。