SPOT-VGT时序数据的土地覆盖应用

Application of SPOT-VGT Time Series Data in Land Coverage

以1999年10 d最大化合成的SPOT VGT/NDVI时序数据为基础数据源,采用MNF变换和非监督分类相结合的方法进行研究区土地覆盖类型分类,提取各地物的NDVI变化曲线,并进行年内物候变化分析,从变化程度和变化类型2个方面进行植被覆盖的年际变化分析。土地覆盖信息提取和变化分析结果能很好地体现区域范围的土地覆盖及景观变化情况。结果表明,SPOT-VGT时序数据在土地覆盖研究中有着很好的应用优势和前景。

upported by the data source of ten days maximum value composite SPOT VGT/NDVI time series of 1999,according to principalcomponents analysis and unsupervised classification,study area was classified in the area of land cover use.The NDVI change curve of thetypical ground feature was extracted.The phenology change in a year was analyzed.The inter-annual variation was analyzed from the degreesof change and the type of change code.The results showed that the ecology of the western region in Jilin Province degraded seriously.SPOT-VGT time series had a very good potential use advantage in the study of land coverage.