CBERS-2/CCD影像数据在干旱区绿洲景观信息图谱中的应用与研究

Research on the Application of CBERS-2/CCD Image in the Oasis Ecological Landscape Information Spectrum of Arid Areas

文章对我国的CBERS-2/CCD卫星遥感数据—2005年6月12日的火焰山北部鄯善县连木沁镇绿洲影像数据进行了处理分析。并叠加了国家基础地理信息中心1?25万数据库中的100m空间分辨率的DEM(数字高程模型),叠加显示水平相当好。从影像分辨率、几何分辨率、地物识别能力等方面进行了影像质量评价,对各景观类型的特征统计值做了相应的分析。与Landsat TM影像对比,CBERS-2/CCD影像具有更高的空间分辨率,更容易反映地物的细节,同时也指出了它的一些不足。论文依据干旱区山地-绿洲-荒漠系统(MODS)以及干旱区所特有的自然景观特征,将该研究区的景观类型划分为山地景观、绿洲景观、居民地景观、水域景观、荒漠景观5大类,从地学信息图谱的角度分析了鄯善县连木沁绿洲的景观要素的时空动态变化,对不同的景观结构特征进行了描述。

CBERS-2/CCD data of China is analyzed which is covered with the oasis of Lian Muqin town,Shanshan,north of Mt.Huoyan,June 12,2005,and superimposed with DEM（Digital Elevation Model） which is supplied by the 1：250,000 database of the Information Center of National Foundation Geography.The result is good enough.The spatial resolution is 100m.An appraisal of the image quality is made that is about the aspects of image resolution,geometry resolution,ground-objects identification and so on.The other analysis is carried on the characteristic statistical value of the various landscapes types.In contrast to Landsat TM image,CBERS-2/CCD data has the higher spatial resolution,and reflects the detail easily,but it also has some insufficiencies.Based on the MODS system and natural landscape characteristics of the arid area,the landscape types of this area are divided into 5 kinds,which are the mountainous region landscape,the oasis landscape,the inhabitant landscape,the waters landscape and the wilderness landscape.The temporal and spatial change of them is studied,and the different landscape characteristic are described.This study is based on the point of Geo-info spectrum.