西吉县黄家二岔小流域彩红外航片判读与制图

以目视判读为主,并辅以立体镜分析与地面踏查收集资料相结合的方法,对1∶1万彩红外航片进行了判读,根据土地类型、土地利用现状和坡度分级的分类原则,获得了影像的判读标志与专题系列图,同时对1∶1万彩红外航片的影像利用效果进行了讨论。实践证明,利用该手段制图比常规调查方法提高效率5～6倍,不同土地类型的判读精度在95％以上,林地类型影像判读精度可达90％,农地与人工草地判读精度达80％,不同地类的侵蚀程度的判读精度也达85％以上。1∶1万彩红外航片可以直观地反映各种自然和社会因素的综合效果,是小流域动态监测的一种必不可少的有效手段。

Interpretation of the Colour Infrared Aerial Photograph and Its Mapping at Huangjia Ercha Small Watershed

A 1:10000 colour infrared aerial photograph was analysed by visual interpretation in combination with stereoscopic interpretation and field data collection. Then, according to the classification principles of land type, land use conditions and slope gradient, the interpretation elements and the series maps on special subjects were produced. In addition, the benefit of using the 1:10000 colour infrared photograph is discussed. It has been proven that using this method increases mapping efficiency by 5 or 6 times over traditional methods. The accuracy of Interpretation are as follows: different land types, more than 95%; forest land, 90%; farmland and grassland, 80%; erosive degrees on different land,85%. 1:10000 colour infrared aerial photographs can reflect the various natural and social conditions, and it is an essential and effective means for dynamic monitoring of small watersheds.