With abstraction you are attempting to reduce and factor out details not immediately related to the functionality that you are attempting to code.
使用抽象，您可以减少和排除一些细节，不用立即关联到您要进行编码的功能上。
We mainly analyse digital terrain, which includes the computation of basic terrain factor and the abstraction of terrain characteristics.
数字地形分析的内容主要包括基本地形因子的计算和地形特征的提取。
Terrain factor is introduced around the definition, the mathematics expression and the abstraction algorithm, etc.
从定义、数学式表达、提取算法等几个方面对地形因子进行阐述。
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