利用NDVI植被指数的新疆天然草原植被长势分级应用

摘要

探讨在大尺度范围内运用遥感技术对天然草原植被长势进行对比分析，通过陆地遥感卫星Terra所搭载的MODIS（moderate resolution imaging spectroradiometer）MOD13Q1植被指数16d250m数据源，分别对2011-2014年的193、177、161d的30景MOD13Q1数据进行计算处理，并根据阈值设定进行分级出图。利用归一化植被指数的天然草原植被长势对比分级方法能够能较好反映了新疆整体植被长势的空间分布格局。%Disscussion on remote sensing technology in a large-scale analysis of the range of natural grass⁃land vegetation growing,equipped with remote sensing satellites Terra MODIS(moderate resolution imaging spectroradiometer)MOD13Q1,16-days,250m vegetation index data,2011-2014 respectively of 193,177,161 days 30 views MOD13Q1 data calculated,processed and graded according to the threshold value has pre⁃set. The normalization method of grading growth symbology classified maps can better reflect the overall spatial distribution of vegetation growing in Xinjiang.