About the data.

Data: CHIRPS and IMeRG

Reference:

1. CHIRPS https://chc.ucsb.edu/data/chirps

2. IMeRG https://gpm.nasa.gov/data/imerg

Source:

1. CHIRPS https://data.chc.ucsb.edu/products/CHIRPS-2.0/global_dekad/tifs/

2. IMeRG https://gpm1.gesdisc.eosdis.nasa.gov/data/GPM_L3/GPM_3IMERGM.06/

Spatial resolution:

1. CHIRPS: 0.05 deg ~ 5.6 km at equator.

2. IMeRG: 0.1 deg ~ 11.1 km at equator

Temporal resolution:

1. CHIRPS: 1-month to 72-month, with rolling dekad

2. IMeRG: 1-month to 72-month, with rolling dekad

Coverage:

1. CHIRPS: 50N-23.5S, 60E-180E

2. IMeRG: 90N-90S, 180W-180E

Method:

• SPI calculated using climate-indices python package, details and how-to guide available at blog post.

• SPI Reference Guide from World Meteorological Organization: https://public.wmo.int/en/resources/library/standardized-precipitation-index-user-guide

Format:

GeoTIFF (*.tif)

Projection:

EPSG:4326

Data availability:

1. CHIRPS:

   • SPI-1mont: Dekad 3, Jan 1981 - Dekad 3, Mar 2021

   • SPI-2month: Dekad 3, Feb 1981 - Dekad 3, Mar 2021

   • SPI-3month: Dekad 3, Mar 1981 - Dekad 3, Mar 2021

   • SPI-6month: Dekad 3, Jun 1981 - Dekad 3, Mar 2021

   • SPI-9month: Dekad 3, Sep 1981 - Dekad 3, Mar 2021

   • SPI-12month: Dekad 3, Dec 1981 - Dekad 3, Mar 2021

   • SPI-24month: Dekad 3, Dec 1982 - Dekad 3, Mar 2021

   • SPI-36month: Dekad 3, Dec 1983 - Dekad 3, Mar 2021

   • SPI-48month: Dekad 3, Dec 1984 - Dekad 3, Mar 2021

   • SPI-60month: Dekad 3, Dec 1985 - Dekad 3, Mar 2021

   • SPI-72month: Dekad 3, Dec 1986 - Dekad 3, Mar 2021

2. IMeRG:

   • SPI-1month: Dekad 3, Jun 2000 - Dekad 3, Dec 2020

   • SPI-2month: Dekad 3, Jul 2000 - Dekad 3, Dec 2020

   • SPI-3month: Dekad 3, Aug 2000 - Dekad 3, Dec 2020

   • SPI-6month: Dekad 3, Nov 2000 - Dekad 3, Dec 2020

   • SPI-9month: Dekad 3, Feb 1981 - Dekad 3, Dec 2020

   • SPI-12month: Dekad 3, May 2001 - Dekad 3, Dec 2020

   • SPI-24month: Dekad 3, May 2002 - Dekad 3, Dec 2020

   • SPI-36month: Dekad 3, May 2003 - Dekad 3, Dec 2020

   • SPI-48month: Dekad 3, May 2004 - Dekad 3, Dec 2020

   • SPI-60month: Dekad 3, May 2005 - Dekad 3, Dec 2020

   • SPI-72month: Dekad 3, May 2006 - Dekad 3, Dec 2020

Date structure:

• YYYY.MM.D

  YYYY = Year

  MM = Month

  D = Dekad (1, 2 and 3). Dekad 1 = 1 - 10, Dekad 2 = 11 - 20, Dekad 3 = 21 - 28/29/30/31

  Example: 2020.12.2.spi6.tif = SPI-6month as of 20 Dec 2020.

Download.

SPI 1-month.

CHIRPS

Regional:

https://on.istan.to/2LzRxoG

Indonesia:

https://on.istan.to/3fTsJSP

IMERG

Global:

https://on.istan.to/3m3FcHI

SPI 6-month.

CHIRPS

Regional:

https://on.istan.to/3sa1lXu

Indonesia:

https://on.istan.to/2ZPqf2o

IMERG

Global:

https://on.istan.to/3syytYr

SPI 24-month.

CHIRPS

Regional:

https://on.istan.to/3sbxrCb

Indonesia:

https://on.istan.to/30EH3IE

IMERG

Global:

https://on.istan.to/3w6gPO0

SPI 60-month.

CHIRPS

Regional:

https://on.istan.to/2Lyl4iz

Indonesia:

https://on.istan.to/3hpmWos

IMERG

Global:

https://on.istan.to/3svDLUQ

SPI 2-month.

CHIRPS

Regional:

https://on.istan.to/3i0Y87Y

Indonesia:

https://on.istan.to/2X3BSkD

IMERG

Global:

https://on.istan.to/2PgC8f5

SPI 9-month.

CHIRPS

Regional:

https://on.istan.to/3bn4nS4

Indonesia:

https://on.istan.to/3fZ2UB6

IMERG

Global:

https://on.istan.to/3sw5VPz

SPI 36-month.

CHIRPS

Regional:

https://on.istan.to/2MQeDIn

Indonesia:

https://on.istan.to/3hqC70I

IMERG

Global:

https://on.istan.to/3w10Kcm

SPI 72-month.

CHIRPS

Regional:

https://on.istan.to/3ot6aZu

Indonesia:

https://on.istan.to/39juKFz

IMERG

Global:

https://on.istan.to/3syBdVN

SPI 3-month.

CHIRPS

Regional:

https://on.istan.to/3saPmZG

Indonesia:

https://on.istan.to/32M8vGQ

IMERG

Global:

https://on.istan.to/3cuZEhm

SPI 12-month.

CHIRPS

Regional:

https://on.istan.to/39fhAK1

Indonesia:

https://on.istan.to/3fT144l

IMERG

Global:

https://on.istan.to/3rwUZQm

SPI 48-month.

CHIRPS

Regional:

https://on.istan.to/3ovyP09

Indonesia:

https://on.istan.to/3fSkZRh

IMERG

Global:

https://on.istan.to/3sw74Xn