土地利用现状更新调查中大气校正对反演植被盖度影响的研究  

Vegetation cover influencing research of the atmosphere correction application on re-investigation of land use situation

作　　者：刘丹丹[1] 马俊海[1] 衣德萍[2] 

机构地区：[1]黑龙江工程学院测绘工程系,黑龙江哈尔滨150050 [2]东北林业大学资源与环境学院,黑龙江哈尔滨150040

出　　处：《黑龙江工程学院学报》2006年第2期23-26,共4页Journal of Heilongjiang Institute of Technology

基　　金：黑龙江省教育厅科学技术研究资助项目(10551262)

摘　　要：定量反演植被盖度是评价土地荒漠化程度的重要手段。以科尔沁沙地为研究对象,选择Landsat5-TM遥感影像数据,在定量反演荒漠化地区植被盖度时,对大气校正前后的归一化植被指数(NDVI)的变化进行对比研究,并对所建立的植被盖度的遥感信息模型进行精度比较。研究表明:对于科尔沁沙地,运用大气校正后图像计算出的NDVI,采用三次拟合曲线建立的植被盖度的遥感信息模型,其实际精度相应提高约11%。Land desertification of NDVI is the key method to assess the grade of land desertification, Taking the Horqin sandy land in Inner Mongolia as its research object, it chooses data from the landsat5-TM remote sensing image. When the vegetation coverage of the desertification area of the quantitative inversions, it takes the methods of Atmospheric Radiation Correction, then it makes contrast analysis on the changes before and after the atmosphere correction normalized vegetation index （NDVI）. Furthermore, it carries out precise comparison on the information of the established remote sensing model. The research indicates that as for the Horqin sandy land in Inner Mongolia, the precision will improve 11 96 correspondingly if NDVI, which is counted through the image of atmosphere correction and the model of the remote sensing information model through building curves fitting of three indexes, is adopted.

关 键 词：大气校正 荒漠化 遥感信息模型 

分 类 号：P237[天文地球—摄影测量与遥感]