Implementing and operating the GFM product requires a set of procedures to ensure the best possible scientific and technical quality of the GFM output layers (including Observed Flood Extent, Reference Water Mask, Exclusion Mask, etc.) and of the generating service.
The GFM product and service quality assessment (QA) procedures include both systematic automated and planned offline quality checks considering all aspects of the production.
The quality of the GFM product is reported on a quarterly basis using Key Performance Indicators that monitor service availability, product timeliness, thematic quality, unique visitors, total visitors, and total downloads (European Commission, 2020). The results of the GFM product and service quality assessment are published online as Annual Reports.