topological features 中文意思是什麼
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In short, vector data take the simplest topological entities - points, lines, and polygons - and anchor them within a 2 - d cartesian coordinate system to describe geographical features
簡言之，矢量數據利用最簡單的拓撲實體點、線和多邊形，並在二維笛卡爾坐標系統中固定它們來描述地理特徵。 -
Taking landuse - dat files as data sources, this paper discusses the features, data structure, and generating methods of topological relationships of between in landuse database generalization, and puts emphasis on the methods for preserving consistency of topological relationships of patches in the process of landuse database generalization
摘要以landuse - dat文件為例，論述了土地利用地圖綜合中圖斑多邊形拓撲關系的特點、數據結構定義及生成方法，闡述了土地數據庫綜合過程中圖斑拓撲關系一致性的維護方法。 -
First, all topological features in the original mesh model are stored, then sort all the edges according to the importance of vertex, finally delete the edges which lead to sliver triangle and which lead to the discontinuity of triangle normal vectors
該演算法首先保存原始網格模型中所有頂點的拓撲特徵，然後根據頂點的重要度對所有的邊進行排序，通過檢查是否產生狹長三角形和三角片的法矢是否連續來判斷邊是否被刪除。 -
This paper analyzes the three levels about data organization to help understand the structure of road network, describes the features, attributes and relations in spatial data of navigation system, and develops the topological relations in road network
摘要針對汽車導航系統中道路數據的空間組織，分析了道路網的三個描述層次，概括了其組成的基本要素及屬性和描述數據集，探討了運用道路數據的組織和空間關系來建立地圖數據庫，為導航系統的道路數據標準化提供依據。 -
Representation of topological spatial relations between contour lines based on terrain features
顧及地形特徵的等高線拓撲空間關系表達 -
Abstract : the artical discusses the features of gis of metallurgical enterprices, expounds the corresponding methods space data acquisition and the establishment of space database, presents the necessary measures for the office method of spa ce data acquisition and the effective method to establish the topological relati on
文摘:該文探討了冶金企業地理信息系統的特點，闡述了相應的空間數據的採集和建立空間數據庫的方法，提出了室內法採集空間數據的必要措施和建立拓撲關系的有效方法。 -
In chapter 3, by identifying of geometric features of all basic entities, the shaping information of all basic entities of a part is recognized, and the carrier information for constructing dimension model is extracted. according to interrelations of all basic entities, and connections between shaping dimensions and topological structures of basic entities, a new method is presented to identify disappearing dimensions caused by interacting features. at the same time, a new strategy to create locating constraint dimensions and convert locating constraint dimensions to locating dimensions is introduced
在第三章中，通過基元體的幾何特徵識別出零件體中各個基元體的幾何形狀，並提取生成尺寸模型所需的載體信息；根據定形尺寸同基元體拓撲結構之間的聯系和各基元體之間的相互關系，提出了由相交特徵引起的消失尺寸的確定方法；介紹了基元體之間定位約束尺寸的生成方法，以及山定位約束尺寸轉化成定位尺寸的調整策略。 -
A novel topological map is proposed in this paper, and its nodes are represented with the visual scale - invariant features and the beam features of the laser range finder
摘要提出了一種新型拓撲地圖；該地圖用激光的扇區特徵和視覺的比例不變特徵來聯合表示節點。
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