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不同的地形、地貌和气候生态条件对小麦生长发育影响很大,也限制了小麦长势卫星遥感监测的精度。在分析豫西半山丘陵区不同地形(河川、丘陵)和气候生态条件(水热条件)对小麦生长影响的基础上,基于EPPL7地理信息系统(GIS),采用扫描、数据格式转化、建立数据库等方法,将NOAA/AVHRR遥感资料和地形图、土壤图、年降水量图、年平均气温图、政区图等图件集成起来,并进行了监测区分层;根据系统监测和抽样调查资料确定了各层的小麦长势遥感监测指标;通过剔除常年非麦象元和分层解译小麦长势,遥感监测精度平均可提高8%左右。工作中采用接口软件等办法,初步实现了GIS和RS的集成应用。
Different terrain, topography and climatic and ecological conditions have a great impact on wheat growth and development, and also limit the accuracy of satellite remote sensing monitoring of wheat growing. Based on the analysis of the influence of different topography (rivers and hills) and climatic and ecological conditions (hydrothermal conditions) on the growth of wheat in the hilly area of western Henan, based on EPPL7 geographic information system (GIS), the scanning, data format conversion and database establishment Method, the NOAA / AVHRR remote sensing data and topographic maps, soil maps, annual precipitation maps, annual mean temperature maps, political maps and other maps integrated, and the monitoring area stratification; according to the system monitoring and sampling survey data to determine The remote sensing monitoring indicators of wheat growing at all levels were obtained. By excluding perennial non-wheat pixels and interpreting the growing wheat by stratification, the accuracy of remote sensing monitoring could be improved by about 8% on average. Work using interface software and other methods, the initial realization of the integration of GIS and RS applications.