Abstract: Propose a kind of new hillside forest modeling method，get the sequence ground images from hillside forests covered with trees，utilize image segmentation to realize the automatic identification of tree information，through point cloud based on constraint conditions of the ground region，extract the algorithm to obtain concentrated point cloud in high precision on ground，finally apply cubic Beta spline model for three times to achieve hillside forest contour modeling.This method applies the photogrammetry technology into hillside forest modeling，resolves the difficulty in not modeling to the ground with trees occlusions and improves the efficiency of hillside forest modeling.

Key words: remote scensing, digital photogrammetry, 3D modeling

摘要： 提出了一种全新的林地建模方法，对生长着树木的林地获取地面序列影像，利用影像分割实现树木信息的自动识别，通过基于地面区域约束的点云提取算法获得地面高精度密集点云，最后应用三次Beta样条曲线插值模型实现了林地等高线的建模。该方法将摄影测量技术应用于林地建模，解决了无法对有树木遮挡的地面进行建模的难题，提高了林地建模的效率。

关键词: 遥感, 数字摄影测量, 三维建模