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中文摘要：
小比例尺DEM制作的晕渲图地形破碎,含有大量的干扰细节,不利于从宏观上把握地形的骨架。为了增强数字地貌晕渲图中的地形特征,本文利用滤波和平面曲率相组合的DEM化简方法来描述山谷和山脊区域。分别针对盆地、平原和山地三种地貌类型,采用90 m、100 m和110 m三种分辨率的DEM数据进行实验,研究发现,这三种地貌类型最佳的山脊夸张系数都为1.3,相应的山谷深化系数分别为0.4、0.6和0.8;而三种分辨率情况下山地的最佳山谷深化系数都为0.8,且山脊的夸张系数都为1.3。
英文摘要：
Shading topography produced by small scale DEM broken,containing details of a large number of interference,is not conducive to grasp the terrain skeleton on the whole. In order to enhance digital hill-shading map in the characteristics of the terrain,the article use the combination of filtering and plane curvature to describe valleys and ridges area. Do experiment respectively on three geographical types such as basins,plains,mountains and 90 m,100 m,110 m three resolution,discover that best ridge exaggerated coefficients of three types are 1. 3 and valley deepened coefficient respectively is 0. 4,0. 6 and 0. 8,and the coefficients of three resolution mountain are the same： valley best deepened coefficient is 0. 8 and the ridge coefficient is 1. 3. These parameters having some regularity have a great significance for the study of generating enhanced topography hill-shading map.
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