基于MODIS影像的内蒙古草原积雪监测  

Snow cover monitoring of Inner Mongolian grassland based on MODIS images

作　　者：侯慧姝[1] 杨宏业[1] 王秀梅[2] 

机构地区：[1]内蒙古工业大学信息工程学院,呼和浩特010051 [2]内蒙古工业大学能源与动力工程学院,呼和浩特010051

出　　处：《测绘科学》2010年第4期117-119,共3页Science of Surveying and Mapping

基　　金：内蒙古自治区突发公共事件应急指挥平台建设项目的相关科研课题"省级应急平台关键技术研究与应用示范";国家"十一五"科技支撑计划重大项目(编号:2006BAK01A32)

摘　　要：光学遥感源MODIS具有高光谱分辨率、高时间分辨率、高空间分辨率、全球范围内免费接收等优势,被广泛应用于洪涝、干旱、森林草原火灾、雪灾等自然灾害的动态监测领域。MODIS数据用于内蒙古草原积雪监测,提取积雪信息在国内尚属空白。本文利用MODIS L1B 500m分辨率数据,经过几何校正、去"双眼皮"预处理,根据归一化差分积雪指数(NDSI)算法和综合阈值判别法对内蒙古自治区2008年1月下旬大范围降雪进行积雪信息提取,制作积雪覆盖图。利用内蒙古生态与农业气象中心发布的雪情遥感监测信息验证积雪覆盖图的准确度。验证结果表明,MODIS数据用于大范围积雪监测非常有效。For its advantages of higher spectral resolution, higher temporal resolution, higher spatial resolution and free-receiving policy, optical remote sensing sensor--MODIS was widely applied to natural disaster dynamic monitoring fields, such as flood, drought, forest fire, grassland fire and snow disaster, etc. The application of MODIS to Inner Mongolia grassland snow cover monitoring and extracting snow information is still a blank research field in China. In this paper, the MODIS L1B 500m resolution data were preprocessed by geometric correction and eliminating bow-tie effects, then according to normalized difference snow index algorithm and a comprehensive threshold criterion, the processed MODIS image was used to extract large-scale snow cover information and to make snow-cover map of the Inner Mongolia Autonomous Region in late January 2008. At last, the paper verified the accuracy of the snow- cover map by official data issued by Inner Mongolia ecological and agro-meteorological center. The result showed that the snow-cover map was accurate so that applying MODIS data to monitor large-scale snow cover could be very effective.

关 键 词：MODIS 积雪监测 雪盖图 归一化差分积雪指数 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]