采用月降水量序列计算标准化降水指数，用于评估干旱等级，计算简单方便，结果实用。-To calculate the Standardized Precipitation Index (SPI) for drought assessment.

ENVI+IDL下，计算温度植被干旱指数-Under ENVI+IDL, calculate the temperature vegetation drought index

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)