中文摘要：

分辨率是等高线数据插值生成格网DEM数据过程中需要考虑的一个重要参数,适宜的分辨率既能将等高线高程信息尽可能保留,又不会因插值造成数据冗余及误差。基于对格网DEM生成方式的理解,提出了等高线隔断线的相关概念,分析了基于地形图矢量化的等高线数据插值生成格网DEM数据,由不同长度等高线隔断线频率统计来确定格网适宜分辨率参考值的方法。同时,不同长度等高线隔断线的长度与其频率相乘得到标准长度,以及等高线隔断线中心点生成的密度分析图,均可在频率特征决定适宜分辨率参考值时起到一定的参考作用。通过样区实验验证,实现简便,可度量性强,与其他相关研究具有一致性,对确定适宜格网分辨率参考值具有一定的借鉴意义。

英文摘要：

Resolution is an important parameter when contour data converts to grid DEM data. Suitable resolution can not only hold contour elevation information, but also reduce interpolation data redundancy and error. This paper put forward a concept of contour cutting line. Based on the understanding of the generating process of grid DEM, a suitable grid resolution reference value could be made by analyzing contour cutting frequency statistics. It was helpful auxiliary while determining the appropriate grid resolution reference value to use standard length which was the multiplying value of contour cutting line length and frequency, and density analysis picture which was made by contour cutting line geometrical center points. The research was based on theoretical basis and experiment, and it was consistent with the relevant research of other scholars, but simple and strong-measurable to determine the appropriate grid resolution reference value.