基于DEM的地层界线V字型法则实现

REALIZATION OF THE V-LIKE RULE ON STRATUM BOUNDARY BASED ON DEM

地质人员经常依照V字型法则连接地层出露界线,但因其随意性和局限性容易出现误差和错误。基于G IS的机助地质填图系统中,基于等高线求取界线由于等高线的不连续性有着明显的局限性。为此,在DEM形成的三维空间中通过求解DEM与空间平面交线的方法来获取地质界线,可以有效地提高精度。文章分析探讨了基于不规则三角形网的地层界线求取思路,并通过实际例子对V字型法则给以实现,结果证明该方法执行速度较快、精度高。

V- like rule is often used to draw stratum boundary. Because of option and limitation, it is not very precise in the actual work. Based on GIS, geologic mapping system shows the terrain with continuous DEM, and draws the stratum boundary by working out the intersection line between DEM and a plain in 3 - D space. This article gives a detailed analysis on the process and actual examples, which proves good appearance and high precision.