On The EOS/MODIS Image Processing And Its Application To The Vegetation Variation Of The Lower Reaches Of The Tarim River

In light of the features and the data format of EOS/MODIS materials, this paper expounds in details different approaches to the processing of MODIS data, including the Pre-processing of image materials, data-extracting, spatial correction and projection variation, etc. The data processing obtains sound effects by the combination of the MODIS processing software invented by the National Satellite Meteorology Center with the ENVI remote sensing software. Meanwhile, the thesis offers some concrete solutions to the problems existing in the data-processing, centering around the projection variation after the transformation of HDF files to TIF files.Benefiting from the IDL Language Programming System, the paper summaries an approach to MODIS data processing and application in light of the ENVI remote sensing software, which provides a band match instrument to the calculation of NDVI and ENVI indexes and the extraction of image information.Concerning the application of MODIS data to the land surface, the paper touches upon the mechanism about 16-day synthesis of the MODIS-NDVI image and the MVC synthesis as well as the distinctions between them, based on the MODIS level 0 data in the year of 2002 and 2003 stored in the Meteorological Bureau of Xinjiang Uygur Autonomous Region and the monthly NDVI data generated by the ENVI software on the basis of theMODIS-NDVI image information, the paper categories the vegetation-covering in the lower reaches of the Tarim River and discusses the seasonal changes of various vegetations. Besides, the response of the vegetations in the area to the ecological water input is also explored through the ecological water input data of the lower reaches of the Tarim River. In addition, the author lays hands on the issue of the spatial and scale consistency of two NDVI products through a comparison of the 1000m resize MODIS-NDVI image with the AVHRR-NDVI image in 1992.Finally, the vegetation variation in either banks of the Tarim River in the past 10 years is also discussed on the basis of a consistent buffer area in the lower reaches of the Tarim River.