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主要介绍了干旱监测遥感支持系统的设计和实现,说明了系统的整体框架结构及其所具备的通用性、可扩展性等特点。为了实现系统的可扩展性,根据COM原理,遥感支持系统开发了一个特别接口,用户可以借此向系统中添加自己开发的其他功能模块,或新的文件格式驱动。此外还着重介绍了垂直干旱指数的计算原理和程序实现算法,并结合宁夏试验区的实际应用对监测结果进行了展示。文中重点介绍了利用C++语言实现垂直干旱指数(PDI)的详细步骤,并对其中寻找土壤点和内存管理等关键算法进行了细致分析。
This paper mainly introduces the design and implementation of drought monitoring remote sensing support system, and shows the overall framework of the system and its versatility, scalability and other characteristics. In order to realize the scalability of the system, according to the COM principle, the remote sensing support system has developed a special interface by which users can add other functional modules developed by themselves or a new file format driver. In addition, the calculation principle of vertical drought index and the algorithm of program implementation are also introduced emphatically. The monitoring results are also presented according to the practical application of Ningxia test area. This article focuses on the detailed steps of using the C ++ language to achieve the vertical drought index (PDI), and detailed analysis of key algorithms such as finding soil points and memory management.