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- regular grid DEM model 规则格网DEM模型
- The Extraction of Catchment and Subcatchment from Regular Grid DEMs 从规则格网DEM自动提取汇水区域及其子区域的方法
- The Extraction of Topographic Patterns Based on Regular Grid DEMs 基于规则格网DEM的地形特征提取算法
- The determination of flow direction in regulate grid DEM is a key problem in distributed hydrological model based DEM. 规则格网DEM的流向确定是分布式水文模型的一个关键问题。
- To generate regular grid digital terrain model (DTM) from scattered points, the key problem is to improve the efficiency of searching neighbor points. 从离散点内插规则格网数字地形模型 (DTM)方法的关键是如何提高待插点周围数据的搜索效率。
- Interrain rendering, regular grid based methods is more suitable than TINs. 所以单就地形绘制来说,基于规则网格的算法更好些。
- The extraction of contour lines from Grid DEM is a primary function in computer-aided cartography ad GIS. 摘要从规则高程格网中自动提取等高线是地理信息系统以及计算机制图的基本功能。
- The Company Pingzhuang in Chifeng and Beijing have inventory, regular grid. 本公司在赤峰平庄及北京设有存货点,定期发车。
- Provide the DEM of forecasting data on the basis of OpenGL and analyze the algorithm of DEM model, coordinate transformation, cruise and the photo realism. 4. 3.;利用 OpenGL实现了预报数据的数字高程模型(DEM),并分析了DEM建模算法,坐标变换,漫游和图形的真实感。
- This paper presents an algorithm of QTM-based line simplification,which is built on the distribution characteristics of polyline vertices in a regular grid. 本文依据数据点在规则网格中的分布规律,提出了一种在QTM数据结构支持下的线状图形化简算法。
- Based on the distribution property of scattered points, two spatial index methods, GRID and KD-Tree, are put forward to generate regular grid DTM. 该文针对离散点的空间分布特性 ,给出了基于网格分块和KD -Tree两种空间索引技术的规则格网内插方法。
- The Algorithm for Generating Regular Square Grid DEM by Contour Dilation 基于等高线膨胀生成规则格网DEM的算法
- The flow direction algorithm based on gridded DEM is an important component of digital terrain analysis. 基于栅格DEM的流向算法是数字地形分析的重要研究内容之一。
- The simplest form of terrain representation is as a regular height field, i.e. considering a regular grid in the plane XZ, with evenly spaced points, a height is attributed to each point. 最简单形式的地形展示是一个规整的高度域,例如,想象一个在XZ平面上的网格,拥有均匀间隔的顶点和每个点拥有一个高度属性。
- The Extraction of Contour Lines from Grid DEM Based on Sorting 基于排序预处理的等高线提取算法
- THREE DIMENSIONAL ELLIPSOIDAL ELEMENT DEM MODEL OF NOPD NOPD的椭球状散体元建模
- The experiment shows that the conversion accuracy between Grid DEMs and TINs affected by conversion tolerance of TINs directly. 实验结果表明,所建立的栅格DEM表面高程误差随着TIN的转换阈值的增大而增大、所提取的地面坡度、沟壑密度的精度随之降低。
- An Algorithm of Contour Lines Based on Regular Grid 基于格网模型的等高线算法
- The conversion between Grid DEMs and TINs is of critical significance in digital terrain analysis which is a key work in the watershed planning of the loess plateau region. 栅格DEM与TIN是DEM表面建模主要的2种方法。 应用DEM进行地形分析时,栅格DEM与TIN的相互转换非常必要,但在转换中所产生的误差直接或间接地影响到分析结果的准确性。
- Study on the Methods of Distinguishing Watershed Parameters with DEM Model 基于DEM模型的流域参数识别方法研究