通過高程數據採樣點來獲取該工作範圍的等高線常規方法:
1. Kriging插值:Spatial Analyst Tools -> Interpolaration ->Kriging
2. 低通濾波:Spatial Analyst Tools -> Neighborhood -> Filter
3. 等值線生成: Spatial Analyst Tools -> Surface ->Contour
4. 線的平滑:Catargraphy Tools -> Generalization ->Smooth Lines,選擇Peak,toleration 0.1 decimal degree效果較好
5. 拓撲檢查:範圍不大,可以人工檢查,刪除小面元,檢查等值線相交。
6. 等值線註記掩膜,一共有三種方法,這裏介紹最正規的方法: Catargraphy Tools -> Annotation -> Contour Annotation