首页> 外国专利> METHOD FOR PARTITIONING REGION REPRESENTED BY CONTOURS INTO SMALLER POLYGONAL ZONES AND CALCULATING DIGITAL ELEVATION MODEL DATA AND GEOGRAPHIC SURFACE CONFIGURATION DATA, AND RECORDING MEDIUM IN WHICH PROGRAM FOR IMPLEMENTING METHOD IS RECORDED

METHOD FOR PARTITIONING REGION REPRESENTED BY CONTOURS INTO SMALLER POLYGONAL ZONES AND CALCULATING DIGITAL ELEVATION MODEL DATA AND GEOGRAPHIC SURFACE CONFIGURATION DATA, AND RECORDING MEDIUM IN WHICH PROGRAM FOR IMPLEMENTING METHOD IS RECORDED

机译：记录将轮廓表示的区域划分为更小的多边形区域并计算数字高程模型数据和地理表面配置数据的方法，并在其中记录用于实现方法的程序的介质

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摘要

Disclosed is a method for partitioning a region represented by contours into smaller polygonal zones which are able to express the geographic features of the region well and calculating digital elevation model data and geographic surface configuration data by using the same. Geographic partitioning is implemented by comprising the steps of: using contour sets to obtain a medial axis for each sub-domain that is a zone between adjacent contours; then partitioning the each sub-domain into smaller zones for the all segments of the medial axis. The method: calculates a geographic feature for each smaller zone after the geographic partitioning; and then calculates the elevation of each lattice point of a digital elevation model (DEM) by interpolating the elevations of the adjacent two contours based on an interpolation method which is predetermined according to the geographic feature of the smaller zone that includes the lattice points. Monotone rational Hermite spline or convex rational Hermite spline is used for the interpolation calculation, and the elevation of a desired point can be calculated from the contour sets. Surface reconfiguration data are obtained in the case of: partitioning the segments of the medial axis into the smaller zones; then straightening the segments of the medial axis; and then calculating three-dimensional coordinates for the polygons of the partitioned smaller zones. The DEM resulting from the aforementioned technology can be used for the orthorectification of high resolution satellite or aerial images. In addition, the DEM is applicable to various fields such as visualization of the surface of the earth, elevation calculation of a certain surface point, and the like.

机译：公开了一种用于将轮廓表示的区域划分为较小的多边形区域的方法，所述较小的多边形区域能够很好地表达区域的地理特征，并通过使用它们来计算数字高程模型数据和地理表面构造数据。通过以下步骤实现地理分区：使用轮廓集获取每个子域的中间轴，该子域是相邻轮廓之间的区域;然后将每个子域划分为中间轴所有段的较小区域。该方法：在地理分区之后，为每个较小的区域计算地理特征;然后，根据根据包含格点的较小区域的地理特征预先确定的插值方法，通过对相邻两个轮廓的高程进行插值，对数字高程模型（DEM）的每个格点的高程进行计算。使用单调有理Hermite样条或凸有理Hermite样条进行插值计算，可以从轮廓集中计算所需点的高程。在以下情况下获得表面重新配置数据：将中轴的段划分为较小的区域;然后拉直中间轴的段;然后为分割的较小区域的多边形计算三维坐标。由上述技术产生的DEM可以用于高分辨率卫星或航空图像的正射校正。另外，DEM适用于各种领域，例如地球表面的可视化，某个表面点的高程计算等。

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公开/公告号WO2010126176A1

专利类型
公开/公告日2010-11-04

原文格式PDF
申请/专利权人 CHOI JOONSOO;KIM CHOEN;
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申请/专利号WO2009KR02237
发明设计人 KIM CHOEN;CHOI JOONSOO;
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申请日2009-04-29
分类号G06T17/05;
国家 WO
入库时间 2022-08-21 18:35:34

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