PRODUCTS
Note: this section provides a concise description of the products provided by the GFMS.
For a more comprehensive documentation the reader is referred to the GFMS Products Description Document.
The GFMS makes available a full set of NRT flood mapping-related products as listed below:
- S-1 Observed Flood Extent
- S-1 Observed Water Extent
- S-1 Reference Water Mask
- Exclusion Mask
- Uncertainty Values
- Advisory Flags
- Sentinel-1 Metadata
- Sentinel-1 Footprint
- Sentinel-1 Schedule
- Affected Population
- Affected Land Cover
It is worth mentioning that, output layers 1 (observed flood event), 2 (observed water extent), and 3 (reference water mask) are provided in both raster (Geotiff) and vector(shapefile) format.
Output layers 4 (exclusion mask), 5 (uncertainty values), 6 (advisory flags), and 10 (affected population) and the additional proposed 11 (affected landcover) are provided in rasterformat (Geotiff), output layer 8 (Sentinel-1 footprint) in vector format and output layer 9 (Sentinel- 1 schedule) as a KML files.
| Products | |
|---|---|
| 1. S-1 Observed Flood Extent | Flooded areas mapped as the difference between S-1 observed water extent and the reference water mask. |
| 2. S-1 Observed Water Extent | Open and calm water mapped using S-1 SAR backscatter intensity. |
| 3. S-1 Reference Water Mask | Normal (i.e. permanent, seasonal) water mapped using S-1 SAR backscatter intensity. |
| 4. Exclusion Mask | Unclassified areas |
| 5. Uncertainty Values | Estimated uncertainty of flood mapping, for all areas outside exclusion mask |
| 6. Advisory Flags | Flags indicating potential reduced quality of flood mapping, due to prevailing environmental conditions (e.g. wind, ice, snow, dry soil), or degraded input data quality due to signal interference from other SAR missions (e.g. Radarsat) |
| 7. Sentinel-1 Metadata | Information on the acquisition parameters of the S-1 data used |
| 8. Sentinel-1 Footprint | Image boundaries of the S-1 data used |
| 9. Sentinel-1 Schedule | Next scheduled S-1 data acquisition |
| 10. Affected Population | Number of people in flooded areas, mapped by a spatial overlay of observed flood extent and gridded population |
| 11. Affected Land Cover | Land cover type flooded |
