等高线与单线河空间冲突的高效检测方法研究

Research on efficient detection method of spatial conflicts between contours and single-line rivers

针对现有方法不能有效区分等高线特征点和检测效率低的问题,该文归纳了用于提取等高线特征点的Split方法,分析了等高线表达地貌单元的变化规律,然后以特征点为基础,建立了局部坐标系,并提出了基于局部坐标系的矢量投影法,用于在特征点中区分出山脊点和山谷点,设计了等高线与河流空间冲突检测流程。试验结果表明,本文的方法能较好地区分山脊点与山谷点,并实现了等高线与河流之间空间冲突的高效检测。

For the problem that current methods can＇t differentiate contour characteristic points effectively and the problem of low detection efficiency,the Split method is summarized which is used for extracting the characteristic points of contours and the changing rule of contours when expressing land-forms is analyzed.Based on the characteristic points,the vector projection method based on the local coordinate system is proposed,which is used to differentiate valley points and ridge points in characteristic points.A new work flow of conflicts detection between contours and single-line rivers is designed.Experimental results show that valley points and ridge points are well differentiated and high-efficiency spatial conflicts detection between contours and rivers is realized.