Landslide trajectory extraction method based on landslide boundary polygon and slope graph

Abstract

The invention provides a landslide trajectory extraction method which can be applied to the field of remote sensing. The method comprises the following steps: acquiring a slope graph and a plurality of landslide boundary polygons of a to-be-measured landslide area, wherein the slope graph comprises a plurality of different landslide slope directions; extracting first skeleton lines corresponding to the multiple landslide boundary polygons, wherein one first skeleton line represents one landslide trajectory, connecting multiple interrupted first skeleton lines belonging to the same landslide slope direction in the multiple different landslide slope directions to form a second skeleton line, wherein the second skeleton line is the landslide trajectory of the same landslide slope direction. According to the landslide trajectory extraction method based on the landslide boundary polygon and the slope graph provided by the invention, discontinuous trajectories belonging to the same landslide slope direction are connected by utilizing a plurality of identified landslide slope directions in the to-be-detected region and combining the skeleton lines extracted by the landslide polygon, so that a complete and accurate landslide trajectory is given, and a support is provided for subsequent research of landslide movement. 本申请提供了一种滑坡轨迹提取方法，可以应用于遥感领域。该方法包括：获取待测滑坡区域的坡向图和多个滑坡边界多边形，坡向图包括多个不同的滑坡坡向。提取该多个滑坡边界多边形分别对应的第一骨架线，一个第一骨架线表示一个滑坡轨迹，将多个不同的滑坡坡向中属于同一滑坡坡向的多个中断的第一骨架线连接成第二骨架线，该第二骨架线为同一滑坡坡向的滑坡轨迹。本申请提供的一种基于滑坡边界多边形和坡向图的滑坡轨迹提取方法，利用识别出的待测区域中的多个滑坡坡向，结合滑坡多边形提取出来的骨架线，将属于同一滑坡坡向中的不连续轨迹连接起来，从而给出完整、准确的滑坡轨迹，为滑坡运动的后续研究提供支撑。