Digital Terrain Model is a general designation of space topographical data set, and it is the digital description with the figure of space position and topographical attributive character.
数字地形模型是空间地形数据集合的统称，是具有空间位置特征和地形属性特征的数字描述。
2
An effective method based on HSV color model for extracting contour lines from color scanned topographical maps was proposed.
提出了一种基于HSV色彩模型的等高线提取方法。
3
The map of daily surface air temperature distribution, using the modified Gaussian weighted model A and B, can accurately reflect the temperature-changing-with-topographical-altitude trend.