The settlement isoline map, based on subsidence prediction in mining area, is difficult to be directly applied to land planning in mining area and MGIS analysis due to its different data structure from digital terrain map.

• 摘要基于开采沉陷预计的采煤区下沉等值线图不便于直观地反映矿区地形的动态变化，其图形数据结构与数字地形图存在差异，难以直接用于规划设计和矿区GIS分析。