Precipitation Index

These sections cover on how to calculate Standardize Precipitation Index (SPI) and Standardized Precipitation-Evapotranspiration Index (SPEI) using different data source and format. See the list of sections to the left for information about each step.

• Background

• Input Data and Specification

  • Working Directory

  • Monthly IMERG in netCDF format

  • Monthly CHIRPS in GeoTIFF format

  • Monthly CHIRPS in netCDF format

  • Monthly TerraClimate in netCDF format

• Index calculation

• Updating the index

• Visualize the result using Panoply

• Convert the result to GeoTIFF

• Example output