单 位：
中国林业科学研究院资源信息研究所;河北省张家口市林业调查规划院
关键词：
快鸟数据;退耕还林;规划图;ISODATA
摘 要：
利用高分辨率快鸟数据对退耕地进行监测,依据规划图,在GIS系统中,进行逐个图班的退耕地块检查,获取退耕地块的面积,地块类型,未造林面积等数据。识别退耕地的新造幼龄林,用NDVI的植被增强方法对退耕地进行增强,以提高幼龄林的识别率。最后用基于ISODATA判定规则的非监督分类方法对退耕地进行分类,得到试验区各地类的面积及所占百分比。分类结果表明,地垄的边界,树冠,树坑等地物信息均能提取出来。
译 名：
Application of High Resolution Quickbird Satellite Data in the Project of Returning Farmland to Forests
作 者：
HUANG Jian-wen~1,JU Hong-bo~1,ZHAO-feng~1,YUE Yan-jie~2,ZHANG Li-mei~2(1.Research Institute of Forest Resource Information Techniques,CAF,Beijing100091 ,China; 2.Zhangjiakou Institute of Forest Inventory and Planning,Hebei Province,Zhangjiakou075000,Hebei,China)
关键词：
Quickbird data;returning farmland to forests;plan map;ISODATA
摘 要：
This paper was concerned with monitoring of the farmland being returned to forests using Quickbird high resolution satellite data. And the returned farmland was investigated according to plan map supported by the GIS system. The relative data such as land patch area, land patch type and non-afforestation area were derived. An attempt was made to identify small trees within the returned farmland. In order to increase the identification rate, a NDVI transformation was performed to enhance the returned farmland vegetation.Unsupervised Classification base on an ISODATA decision rule of a fused image was used to create a map illustrated with different type of land patches. The area of different types of landuse and their percentage were calculated. The results showed that the detailed landcover such as boundary of crown of a tree, ribbing and compost could be extracted from the imagery.
