摘要
在分析MODIS数据与水体识别相关的1~7波段典型地物光谱图像特征及相关水体指数模型的基础上,对莫伟华等提出的组合水体指数（CIWI）提出了改进,用归一化建筑指数（NDBI）与归一化植被指数（NDVI）组合,构建了改进型组合水体指数MCIWI（Modified-Combined Index for Water Body Identification）,增强了河流、湖泊等水体与城镇、植被等其他信息的区分度,能够有效提取水体信息,特别是城市水体信息.通过应用2009年的MODIS资料在重庆主城区与长寿湖区的水体信息遥感监测实验表明,MCIWI水体识别效果要优于其他水体指数模型.
Based on analyses of the spectral characteristics of surface objects in MODIS 1 to 7 wave bands related to water body identification,a modified version of CIWI is put forward in this paper,which is called modified-combined index for water body identification（MCIWI）.This new water index,based on the study of NDWI,MNDWI and CIWI,combines vegetation index and building index and effectively increases the discrimination of water body from the information of vegetation,town and other objects.MCIWI performs better than NDWI,MNDWI and CIWI in discriminating water body from other objects,especially in cities,which has been proved by the monitoring of water body information in the urban area of Chongqing and Changshouhu Lake of the municipality based on the MODIS data from 2009.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第1期112-119,共8页
Journal of Southwest University(Natural Science Edition)
基金
重庆市气象局重大科技攻关项目:重庆市农业气象业务服务技术研究
