WAPOR Daily Reference Evapotranspiration 2.0

  • The FAO WaPOR dataset provides daily reference evapotranspiration (RET) data from 2009-01-01 to 2023-03-20.

  • RET represents the evapotranspiration from a hypothetical reference crop, simulating a well-watered grass surface.

  • Data is available at a 18924 meter resolution and is measured in millimeters (mm).

  • The dataset is freely available for research and scientific purposes, courtesy of the Food and Agriculture Organization of the United Nations (FAO).

  • Users can access and analyze the data using Google Earth Engine.
FAO/WAPOR/2/L1_RET_E
Dataset Availability
2009-01-01T00:00:00Z–2023-03-20T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("FAO/WAPOR/2/L1_RET_E")
Cadence
1 Day
Tags
agriculture fao wapor water water-vapor

Description

Reference evapotranspiration (RET) is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface. Each pixel represents the daily reference evapotranspiration in mm.

Bands

Pixel Size
18924 meters

Bands

Name Units Scale Pixel Size Description
L1_RET_E mm 0.1 meters

Reference Evapotranspiration (Daily) [mm]

Terms of Use

Terms of Use

The Food and Agriculture Organization of the United Nations (FAO) is mandated to collect, analyze, interpret, and disseminate information related to nutrition, food, and agriculture. In this regard, it publishes a number of databases on topics related to FAO's mandate, and encourages the use of them for scientific and research purposes. Consistent with the principles of openness and sharing envisioned under the Open Data Licensing For Statistical Databases, and consistent with the mandate of FAO, data from the Water Productivity Open Access Portal (WaPOR), as part of AQUASTAT - FAO's Global Information System on Water and Agriculture, is available free to the user community.

Citations

Citations:

  • FAO 2018. WaPOR Database Methodology: Level 1. Remote Sensing for Water Productivity Technical Report: Methodology Series. Rome, FAO. 72 pages.

  • FAO 2020. WaPOR V2 Database Methodology. Remote Sensing for Water Productivity Technical Report: Methodology Series. Rome, FAO. https://www.fao.org/3/ca9894en/CA9894EN.pdf

Explore with Earth Engine

Code Editor (JavaScript)

var coll = ee.ImageCollection('FAO/WAPOR/2/L1_RET_E');
var image = coll.first();
Map.setCenter(17.5, 20, 3);
Map.addLayer(image, {min: 0, max: 100});
Open in Code Editor
Reference evapotranspiration (RET) is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface. Each pixel represents the daily reference evapotranspiration in mm.
FAO/WAPOR/2/L1_RET_E, agriculture,fao,wapor,water,water-vapor
2009-01-01T00:00:00Z/2023-03-20T00:00:00Z
-39.9953437 -30.15 40.0044643 65.13
Google Earth Engine