基于面向对象影像分类技术的生态清洁小流域现状调查

结合当前北京市开展的生态清洁小流域建设,尝试利用现有的高分辨率航片,采用基于面向对象的高分辨率影像分类技术和G IS技术来开展生态清洁小流域水土保持现状等本底资料的调查,从而为生态清洁小流域的基础数据库建设、治理措施规划与布局提供基础数据和科学依据。应用实例表明,采用面向对象影像分类技术开展生态清洁小流域现状调查,在方法上、技术上都是可行的,不仅可以提高调查的客观性、准确性和现势性,而且也可以大大提高调查的工作效率,是未来生态清洁小流域调查的可选方法。

Present Status Survey of Ecologic and Clean-Type Small Watersheds Based on Object-Oriented Image Classification Technique

It conducts the background data survey of soil and water conservation status of ecologic and clean-type small watersheds by trying to utilize the existed high resolution aerial photos, using the techniques of object-oriented-based image classification and GIS and combining with the present ecologic and clean-type small watersheds building developed in Beijing. Thus, it provides basic data and scientific basis for the building of basic data bank of ecologic and clean-type small watersheds and the planning and layout of treatment measures. The applied example shows that both the method and technique of the present status survey are feasible. It can not only increase the objectivity and accuracy of the survey, but also greatly increase the working efficiency. Therefore, it is a selectable way for the survey of ecologic and clean-type small watersheds in the future.