Precipitation-based indices are generally considered as the simplest indices because they are calculated solely based on long-term rainfall records that are often available. The mostly used precipitation-based indices consist of Decile Index (DI) Hutchinson Drought Severity Index (HDSI) Percen of Normal Index (PNI) Z-Score Index (ZSI) China-Z Index (CZI) Modified China-Z Index (MCZI) Rainfall Anomaly Index (RAI) Effective Drought Index (EDI) Standardized Precipitation Index (SPI).
R package for the calculation of Standardized Index values (SPI, SPEI, SSI,...) on a daily basis.
Free software that works great, and also happens to be open-source Python.
Tutorial of basic remote sensing and GIS methodologies using open source software (GDAL in Python or R)
️WIP️An open access book on scientific visualization using python and matplotlib
A Python package for interactive mapping with Google Earth Engine, ipyleaflet, and ipywidgets
