數(shù)字高程模型的建立方法與精度評(píng)定畢業(yè)論文(已修改)
2025-07-05 18:31 本頁(yè)面
【正文】 西南林學(xué)院本科畢業(yè)（設(shè)計(jì)）論文題目：數(shù)字高程模型（DEM）的建立方法與精度評(píng)定教學(xué)院系資源學(xué)院專(zhuān)業(yè)地理信息系統(tǒng) 評(píng)閱人 數(shù)字高程模型（DEM）的建立方法與精度評(píng)定 摘 要數(shù)字高程模型（ Digital Elevation Model，DEM）是對(duì)地球表面地形地貌的一種離散的數(shù)字表達(dá)，是地理信息系統(tǒng)、遙感、虛擬現(xiàn)實(shí)、數(shù)字化戰(zhàn)場(chǎng)等領(lǐng)域賴(lài)以進(jìn)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(guó)家地理信息的基礎(chǔ)數(shù)據(jù)之一。因此，如何有效的建立 DEM以及如何評(píng)價(jià) DEM精度，成為 DEM研究的熱點(diǎn)之一，DEM的建立和精度評(píng)定具有十分重要的理論意義和應(yīng)用價(jià)值。本文系統(tǒng)闡述了基于等高線(xiàn)數(shù)據(jù)建立高質(zhì)量 DEM的理論和方法，分析并比較了國(guó)內(nèi)外建立 DEM的方法。采用 （ TIN）。同時(shí)，基于 TIN的建立。在 DEM的研究中，DEM精度關(guān)系到 DEM的生產(chǎn)者與使用者，人們總是希望 DEM能夠完全準(zhǔn)確、客觀地反映地球表面的起伏變化。論文也探討了 DEM精度評(píng)定的方法，運(yùn)用等高線(xiàn)回放方法和檢查點(diǎn)法結(jié)合實(shí)例進(jìn)行了分析，昀后總結(jié)全文并提出展望。關(guān)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(xiàn)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)。 (Triangulated Irregular Network) TIN。 Grid DEM。 accuracy 。contour line 目錄 1 緒論................................................................................................................................... 1 、意義 ............................................................................................ 1 .................................................................................... 1 DEM的應(yīng)用.............................................................................................................. 3 科學(xué)研究應(yīng)用.................................................................................................... 3 商業(yè)應(yīng)用............................................................................................................ 3 工業(yè)工程應(yīng)用.................................................................................................... 3 其它應(yīng)用............................................................................................................ 4 ............................................................................................. 4 2 DEM介紹.......................................................................................................................... 5 DEM的含義.............................................................................................................. 5 DEM的表示方法...................................................................................................... 5 DEM的表示模型...................................................................................................... 6 規(guī)則格網(wǎng)模型.................................................................................................... 6 不規(guī)則三角網(wǎng) TIN模型 ................................................................................... 7 等高線(xiàn)模型........................................................................................................ 8 DEM內(nèi)插數(shù)學(xué)模型.................................................................................................... 9 整體內(nèi)插............................................................................................................ 9 分塊局部?jī)?nèi)插.................................................................................................. 10 逐點(diǎn)內(nèi)插法...................................................................................................... 10 3 TIN的構(gòu)建....................................................................................................................... 11 TIN的建立................................................................................................................ 11 ....................................................................................................... 12 三角網(wǎng)生長(zhǎng)法.................................................................................................. 12 分而治之法...................................................................................................... 12 TIN的三角剖分 ...................................................................................................... 13 TIN建立的設(shè)計(jì).......................................................................... 14 4 DEM建立實(shí)驗(yàn)及分析.................................................................................................... 18
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