terrain model 中文意思是什麼
terrain model
解釋
立體地形模型-
Applying the information extracted from numerous hydrographic data of field trials collected by h / hcs - 017, the first set of multi - beam swath bathymeter developed in china, a series of mosaic techniques have been carefully studied in this thesis, including digital terrain model building, statistical error analyzing, hydrographic data mosaicking as well as tides correction and projection of the earth coordinates. finally, standard digital sea - charts and three dimensional seafloor images are successfully developed that are consistent with hydrographic surveying principles
本文利用我國第一臺h hcs ? 017型條帶測深儀的測量數據進行拼圖技術的研究，主要研究的內容有：利用分帶原理對深度數據進行潮汐修正，得到瞬時海面的深度數據；對測深數據進行誤差分析處理，去除野值；將多波束數據進行坐標變換及投影轉換后構建數字地理模型，進而根據海道測量規范繪制標準海圖。 -
Gis ( geographic information systems ) is a computer system with collecting, checking, intergreting and analysing information which is related with interface of earth. digital terrain model display two demission geographic position and relational properts information with digital pattern. dtm is an important component of gis, and is basic of " digital earth "
數字地面模型（ digitalterrainmodel ， dtm ）是地表二維地理空間位置和其相關的地表屬性信息的數字化表現，是地理信息系統（ geographicinformationsystem ， gis ）的重要組成部分，是數字地球的基礎。 -
The research emphases of the paper include the establishment of terrain model and the realization of detail of surface. during the establishment of terrain model, the theory of fractal and the characteristics of ivs, fractal brown motion ( fbm ) are discussed and compared, and prove the model is adapt to the feature of the physiognomy
地形模型的建立和地表細節的表現是本文研究工作的重點，在建立地形模型的過程中，分析了分形理論和分形法中的隨機插值、布朗運動（ fbm ）的原理並進行比較，論證了其數學模型與真實地貌特徵基本吻合，並運用隨機插值法（ insert - valuestochastically ， ivs ）實現了地形的分形模型。 -
To solve the inaccuracy problem caused by the two existing methods ( average end - area method and prismoidal method ) used for the calculation of roadway earthwork volume, this paper puts forward a new concept of the 3 - dimensional algorithm that takes all the roadway geometric design procedures as a kind of geometrical operation between the ground model ( original terrain model ) and the roadway model ( designed model ) under certain constraints, and then presents a complete 3 - dimensional algorithm of roadway earthwork volume as well as its executable computer program. the algorithm benefits from the re - triangulation technique of constrained delaunay triangulation ( cdt ), which can yield a true volume value theoretically. through a number of practical tests covering varied intervals between adjacent cross sections, it is proven to possess a higher accuracy compared with that of traditional methods. all the work involved in this paper indicates that the 3 - dimensional calculation of roadway earthwork volume is feasible, more accurate and should have further application in practice
針對目前廣泛使用的道路土方量計算方法平均斷面法和稜柱體法計算不準確的缺點，提出了三維土方量計算演算法的概念.該演算法以帶約束的狄羅尼三角化（ cdt ）為技術核心，認為所有道路幾何設計過程都是地面模型和道路（設計）模型進行幾何運算的結果.基於此，本文設計出相應的演算法步驟，同時完成了相應的軟體開發，使得該三維演算法能和傳統的方法進行對比.此外，結合工程實例，採用了不同的道路橫斷面間距對三維計算方法和傳統方法的誤差進行比較、分析.結果證明三維演算法具有更好的精度，該演算法可用於道路、場地平整等工程土方量計算 -
By using visual basic 5. 0 language, activex automation interface, the oop technology and developing autocad 2000, the system not only can achieve the horizontal design and the vertical design of three - legs and four - legs intersection at the tangent section and the curved section, but also can calculate earthwork based on digital terrain model
本系統以vb5 . 0為開發工具，採用面向對象的編程方法，利用activex自動化技術，通過對autocad2000的二次開發，可以進行處于直線路段、曲線路段的三路、四路交叉口的平面設計和立面設計與繪圖，完成基於數字地面模型的工程數量計算。 -
The technique of 3d terrain generation is the key technique in the virtual digital battlefield environment construction, where scene reality, multi - resolution and attribute query ability on terrain model are desired. in this dissertation, i discuss model data obtainment and model generation methods
三維地形環境生成技術是虛擬數字戰場環境生成的關鍵技術，要求地形模型是一種真實、多解析度的、具備屬性查閱功能的幾何模型。 -
The algorithm generates three - dimensional terrain model and displays in real time. it uses an efficient and simple method to attain the dependency between sampling points on terrain, and refines the center points in top - down way. it incorporates the dependency of points into their errors so that the cracks inside the terrain block are avoided, at the same time eliminates the cracks at the edges of blocks through adjusting the elevations of those points that cause the cracks
該演算法基於規則格網數據實時生成三維地形模型，並實時顯示；採用了一種簡單而高效的方法來求解采樣點之間的依賴關系；以「從頂向下」方式細分中心頂點；並把頂點依賴關系融合進頂點誤差中，避免了地形塊內部的裂縫，同時通過調整塊邊界點的高程消除了塊邊界處的裂縫；演算法還具有利用幀間相關性，視相關等方面特點。 -
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
並以jarnopeschie的演算法為基礎，全面研究了路網的自動綜合演算法通過分析研究多解析度地形表現模型和實時地形簡化應解決的關鍵技術問題，進一步研究了規則三角形網和顧及地面特徵點線的不規則三角形依賴于視點的多解析度地形模型簡化演算法；應用研究所取得的理論和方法，開發了系統實現模擬軟體hypergis和hyperterrain 。 -
Creation of triangulation digital terrain model and its application in alignment design
三角網數字地面模型的生成及其在路線設計中的應用 -
In this paper, based on the tide, tidal current and ocean wave numerical computing techniques and the constructive method of seabed terrain model, the fusion and visualization of multiple digital marine geographic environmental information for the nearshore marine environmental safeguard are locally realized by using the level of detail model and 3 - d rendering technique, which will provide theoretic and experiential basis for the study field in the future
摘要以潮汐、潮流和海浪數值的計算技術和數字海底地形模型的構造方法為基礎，應用層次細節模型和三維渲染技術，完成了近岸海洋環境保障的多種數字海洋地理環境信息的融合與可視化的局部實現，為今後此領域的研究提供了理論和經驗基礎。 -
The paper analyses the complex terrain model ’ s real time and dynamic simplifying and multi - resolution display. this dissertation combines the technology of world - space partitioning 、 real - time rending and an improved roam algorithm to solve too many triangles rendering problem in large - scale terrain environment
研究了復雜地形模型的實時動態簡化與多解析度表示，運用一種將場景分割技術、實時渲染相關技術和優化的roam演算法相結合的大規模地形渲染方法來解決三角形數目大的問題。 -
The other is based on contour line. the way is that first editing the contour line, then saving these heights, finally depending on linear calculating middle value, thus getting the height of every mesh point, and the 3d terrain model
另一種方法是基於等高線的方法，該方法是通過對等高線進行編輯，保存相應點的高程，再根據線性插值，得到各個網格點的高程，從而生成對應的地形模型。 -
Using latest visual software idl ( interactive data language ) and combining trigrid function with triangulate function in idl, regular network terrain model and 3 - d shallow and deep sliding surface model of zhafangping landslide body based on delaunay triangular network is set up. it makes the sliding surface turn from " recessiveness " into " dominance ", and gets numerous different three - dimensional cubic chart, contour topographic map, the combine model of terrain model and contour topo - graphic map. and every visual model has analysed and compared in detail
利用可視化軟體idl中的triangulate函數和trigrid函數相結合，建立了基於delaunay三角網的榨坊坪滑坡體規則格網地面模型和淺層、深層滑動面三維可視化模型，實現了該滑坡體的三維模擬與再現，使滑動面由「隱性」變為了「顯性」 ，且獲得了眾多不同角度的三維立體圖、等高線地形圖和地面模型與等高線地形圖的組合圖等，並對各可視化模型進行了詳細地分析與比較。 -
The vector - graph modeling method of dem and the fractal - construct method of terrain model are discussed
介紹了基於矢量圖的dem建模技術及地形分形構造演算法的應用。 -
Making full use of the correlated space information of multi - beam bathymetric data, the author put forward a method of gaussian surface approximation to build the grid net of regular digital terrain model ( dtm ) of surveyed seafloor, which is more accurate than other approximation methods
本文充分利用了多波束數據的空間相關信息，提出了一種基於高斯地形曲面擬合的數字地理模型數據網格化方法，準確快速地得到標準等深線圖。 -
Basing on the foreshore digital terrain model and with the help of gis platform, the function of spatial information management and foreshore terrain analysis is integrated in the system, and coupling query and sql query are realized in it, too. the system has been used for several layout projects, and the effect has benn proved good
以灘塗數字地形模型為基礎，藉助于地理信息系統平臺，系統集空間信息管理和灘塗地形分析功能於一體，實現了多種數據的耦合查詢、條件查詢等，並且參與了相關項目的規劃工作，實踐證明效果良好。 -
And the complete solution to visualize the dynamic terrain in real time is given. it both eliminates mesh discontinuities and represents the deformed region well in terrain model
該方法既消除了地表網格模型中的不連續問題，義能很好的表現地形的形變效果。 -
I apply the modified double - iterated modeling algorithm to realize the three - dimension tree model successfully based on l - system with ips. to realize the terrain model, i expound the improved diamond - square algorithm in light of fractal interpolation and use it to model cloud, two - dimension texture terrain surface and three - dimension terrain
基於l系統以及迭代函數系統的特性提出了改進的三維樹木模型雙迭代生成演算法來實現三維樹木模型的模擬，而在三維地貌模型的模擬中，提出了改進的基於分形插值的diamond - square演算法實現了雲團、二維紋理地表、三維地形等模型。 -
Shiphandling simulator is a device that can partly imitate the true environment at sea ， and is specially designed to satisfy marine education and trains and maritime research etc. one of its key techniques is to create the virtual environment at sea ， and the terrain is its important component. according to the needs of the real time visual display of the shiphandling simulator ， this paper analyses the requirements of the geometry precision of the important islands and background hills which are within the ships ' visible scope ， and brings forward the modeling methods of the hill ' s pileup and the hill ' s silhouette edges based on contour lines. it also presents the definition of error that the hill ' s silhouette edges graph has been given and the effective scope of application ， and firstly established the error criterion of terrain model that is built in shiphandling simulator. with these two kinds of method ， the size of data storage can be minimized greatly ， and the requirements of high update rate and geometry precision for the real time visual display of the shiphandling simulator can be satisfied
船舶操縱模擬器是一種能夠部分模仿海上真實情況，專門為滿足航海教育與培訓、航海技術研究等目的而設計研製的裝置，其核心技術之一是海上視景模擬，而地形地貌是海上視景中的重要組成部分.根據船舶操縱模擬器實時視景顯示的需要，在分析航行船舶對可視范圍內重要島嶼與背景山脈的幾何精度要求的基礎上，提出了基於等高線的山形堆積建模和山形輪廓建模方法，並給出了山形輪廓圖形的誤差定義、有效適用范圍，以及船舶操縱模擬器中地形建模的誤差準則，該方法生成圖形的數據量較小，其圖形更新速率與幾何精度能達到船舶操縱模擬器實時視景顯示的要求 -
This dissertation focused on the research and experiment work in the following aspects : 1 ) the basic problems of digital 3d terrain modeling and visualization ; 2 ) the reconstruction of terrain surface ; 3 ) the real tune terrain simplifying and multi - resolution terrain model presenting. a view dependent dynamic multi - resolution terrain model is presented
論文從三維數字地形建模與可視化的基本問題，數字地形三維模型的計算機重構，復雜地形模型的實時動態簡化與多解析度表示等方面開展了研究與試驗工作。
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