气象干旱指标计算程序，已经集成为arcgis工具箱，导入后即可使用 也可在py环境下直接运行(The meteorological drought indicator calculation program has been integrated into the arcgis toolbox and can be used after import. Can also run directly in py environment)

利用R语言计算SPEI指数用来估计气象领域中的土壤干旱程度。(The SPEI index is calculated using R language to estimate soil drought in meteorological field.)

气象领域中SPEI指数的计算，用于评估土壤干旱情况。(The program is used to caculate the SPEI index in the meteorological field that used to assess soil drought.)