【正文】 DEM內(nèi)插數(shù)學模型.................................................................................................... 9 整體內(nèi)插............................................................................................................ 9 分塊局部內(nèi)插.................................................................................................. 10 逐點內(nèi)插法...................................................................................................... 10 3 TIN的構建....................................................................................................................... 11 TIN的建立................................................................................................................ 11 ....................................................................................................... 12 三角網(wǎng)生長法.................................................................................................. 12 分而治之法...................................................................................................... 12 TIN的三角剖分 ...................................................................................................... 13 TIN建立的設計.......................................................................... 14 4 DEM建立實驗及分析.................................................................................................... 18 ............................................................................................................... 18 ............................................................................................................... 19 ................................................................................................... 19 5質(zhì)量檢查與精度評定...................................................................................................... 25 DEM誤差及誤差源.................................................................................................. 25 DEM精度檢查和評估技術...................................................................................... 25 影響 DEM精度的主要因素........................................................................... 25 DEM精度檢查的內(nèi)容.................................................................................... 25 DEM精度評定.......................................................................................................... 26 精度評價區(qū)域選取.......................................................................................... 26 精度評定方法.................................................................................................. 27 6 總結與展望..................................................................................................................... 31 .................................................................................................................... 31 ............................................................................................... 32 參考文獻............................................................................................................................. 33指導教師簡介..................................................................................................................... 35 致謝..................................................................................................................................... 36 1 緒論 論文研究的目的、意義 美國麻省理工學院 Chaires L M iller教授于 19561958年首次提出了數(shù)字高程模型（ Digital Elevation Model， DEM）的概念， DEM自 20世紀 50年代后期開始被采用，并在測繪、土木工程、地質(zhì)、礦山工程、景觀建筑、道路設計、防洪、農(nóng)業(yè)、規(guī)劃、軍事工程等諸多領域得到了廣泛應用。關鍵詞：數(shù)字高程模型（ DEM）不規(guī)則三角網(wǎng)（ TIN）格網(wǎng) DEM 精度等高線Methods of Building DEM and Accuracy Assessment Abstract Digital Elevation Model is a kind of discrete digital expression to the terrain relief of the earth surface. As the most important spatial information in geographical database, DEM plays a more and more important role in many areas，such as GIS, RS, VR, digital battlefield and so on. Therefore, how to produce high quality DEM and how to evaluate the accuracy of DEM bee hotspots in the research of DEM, They are very important in theoritics and valuable in use. The paper have discussed the theories and methods on how to produce high quality DEM data based on terrain feature from digital contour lines. Then we pared some popular methods of building DEM at home and abroad and tried to build the Triangulated Irregular Network model from contour lines using the software of also built TIN using the Visual . In the research of DEM, its accuracy influences the producers and users, hence people always hope DEM can reflect the fluctuantion of the earth surface exactly and objectively. Meanwhile, the paper assessed the precision of the DEM data by contour lines overlay and observe points. At last, the paper summarized research productions and development direction. Keywords：DEM (Digital Elevation Model)。采用 （ TIN）。西南林學院本科畢業(yè)（設計）論文題目：數(shù)字高程模型（DEM）的建立方法與精度評定教學院系資源學院專業(yè)地理信息系統(tǒng) 評閱人 數(shù)字高程模型（DEM）的建立方法與精度評定 摘 要數(shù)字高程模型（ Digital Elevation Model，DEM）是對地球表面地形地貌的一種離散的數(shù)字表達，是地理信息系統(tǒng)、遙感、虛擬現(xiàn)實、數(shù)字化戰(zhàn)場等領域賴以進行三維空間數(shù)據(jù)處理與地形分析的核心數(shù)據(jù)，是國家地理信息的基礎數(shù)據(jù)之一。同時，基于 TIN