Implemented by the European Commission as part of the Copernicus Programme

CEMS Global Flood Monitoring - Annual Product and Service Quality Assessment Report 2022

The Global Flood Monitoring (GFM) product of the Copernicus Emergency Management Service provides a continuous monitoring of flood events worldwide, by processing and analysing in near real-time all incoming Sentinel-1 Synthetic Aperture Radar (SAR) satellite imagery.


The GFM - Annual Product and Service Quality Assessment Report 2022, which was recently published as a JRC Technical Report, presents the results of the quarterly monitoring and reporting of the following key aspects of the GFM product performance:


  • The thematic accuracy of the GFM Observed Flood Extent and Reference Water Mask, based on selected Use Cases of worldwide flood events.
  • The thematic accuracy of the GFM processed archive of worldwide observed floods and water bodies, for the years 2015-2021.
  • The product timeliness with which the GFM output layers are delivered.
  • The availability to users of all service components of the GFM product, and those aspects related to user uptake and usability of the service.
  • The general plausibility of the GFM Exclusion Mask, which denotes areas where SAR-based flood and water mapping is not technically feasible.


The GFM - Annual Product and Service Quality Assessment Report 2022 (as well as the previously published GFM - Pre-operational Product and Service Quality Assessment Report) can be downloaded from the following link:


In the image: for the August 2022 flood disaster in Pakistan, the satellite-derived GFM Observed Flood Extent, generated in near real-time by the GFM product, achieved a thematic accuracy of 80.4% (measured using the Critical Success Index). This flood map shows the output generated by the GFM product for the Pakistan flood event on 22.08.2022, with grid-cells correctly classified as flood and water highlighted in blue.

By Stefania Grimaldi     Dec. 13, 2023, 7:15 a.m.