基于航空摄影测量的森林数字化地形模型

Digital Terrain Model of Forest Based on Aerial Photogrammetry

以东北林业大学帽儿山实验林场老山施业区为研究区域,在ERDAS及Arc View系统平台上,通过空中三角测量生成了区域的数字化地形模型(DTM)及正射影像平面图(DOM),以此为基础研究了数字化地形模型的森林地形信息的提取和查询技术,为森林经营与规划提供必要的信息。研究表明:基于航空摄影测量方法获得的数字化地形模型较之由地形图获取的方法具有许多优越性;数字化地形模型叠加小班区划,提取小班高程、坡度、坡向数据,查询森林适生立地条件及分类具有可行性。

A study was candueted to generate Digital Terrain Mode] （DTM） and Digital Orthophoto Map （DOM） for Laoshan Working Circle of Maoershan Forest Farm attached to Northeast Forestry University after aerial triangulation on ERDAS and Arc View system platform. Based on the resuhs, extraction and query techniques about forest terrain information of DTM were studied, in order to provide necessary information for forest management and planning. Result shows that the obtained DTM based on aerial photogrammetry has a lot of superiority compared with DTM obtained by the method of topographic maps. It is feasible to use DTM assisted by sub-compartment division to extract sub-compartment elevation, slope gradient and slope aspect data, and query snitable site conditions and classification of forests.