Difference between revisions of "PRODUCTS"
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− | ''Note: this section provides a concise description of the products provided by the | + | ''Note: this section provides a concise description of the products provided by the '''GFM'''. <br> |
− | For a more comprehensive documentation the reader is referred to the ''' | + | For a more comprehensive documentation the reader is referred to the '''GFM Products Description Document'''.'' |
− | The | + | The GFM makes available a full set of NRT flood mapping-related products as listed below: |
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{| class="wikitable" style="margin: auto;" | {| class="wikitable" style="margin: auto;" | ||
− | ! | + | !Products |
+ | !Description | ||
+ | !Data Formats | ||
|- | |- | ||
|1. [[S-1 Observed Flood Extent]] | |1. [[S-1 Observed Flood Extent]] | ||
− | |Flooded areas mapped as the difference between S-1 observed water extent and the reference water mask. | + | |Flooded areas mapped as the difference between S-1 observed water extent <br> and the reference water mask. |
+ | |''raster (Geotiff) and vector(shapefile)'' | ||
|- | |- | ||
|2. [[S-1 Observed Water Extent]] | |2. [[S-1 Observed Water Extent]] | ||
|Open and calm water mapped using S-1 SAR backscatter intensity. | |Open and calm water mapped using S-1 SAR backscatter intensity. | ||
+ | |''raster (Geotiff) and vector(shapefile)'' | ||
|- | |- | ||
|3. [[S-1 Reference Water Mask]] | |3. [[S-1 Reference Water Mask]] | ||
|Normal (i.e. permanent, seasonal) water mapped using S-1 SAR backscatter intensity. | |Normal (i.e. permanent, seasonal) water mapped using S-1 SAR backscatter intensity. | ||
+ | |''raster (Geotiff) and vector(shapefile)'' | ||
|- | |- | ||
|4. [[Exclusion Mask]] | |4. [[Exclusion Mask]] | ||
|Unclassified areas | |Unclassified areas | ||
+ | |''raster (Geotiff)'' | ||
|- | |- | ||
|5. [[Uncertainty Values]] | |5. [[Uncertainty Values]] | ||
− | |Estimated uncertainty of flood mapping, for all areas outside exclusion mask. | + | |Estimated uncertainty of flood mapping, for all areas outside exclusion mask |
+ | |''raster (Geotiff)'' | ||
+ | |- | ||
+ | |6. [[Advisory Flags]] | ||
+ | |Flags indicating potential reduced quality of flood mapping, due to prevailing <br> | ||
+ | environmental conditions (e.g. wind, ice, snow, dry soil), or degraded input data quality due <br> | ||
+ | to signal interference from other SAR missions (e.g. Radarsat) | ||
+ | |''raster (Geotiff)'' | ||
+ | |- | ||
+ | |7. [[Sentinel-1 Metadata]] | ||
+ | |Information on the acquisition parameters of the S-1 data used | ||
+ | |''KML'' | ||
+ | |- | ||
+ | |8. [[Sentinel-1 Footprint]] | ||
+ | |Image boundaries of the S-1 data used | ||
+ | |''KML'' | ||
+ | |- | ||
+ | |9. [[Sentinel-1 Schedule]] | ||
+ | |Next scheduled S-1 data acquisition | ||
+ | |''KML'' | ||
+ | |- | ||
+ | |10. [[Affected Population]] | ||
+ | |Number of people in flooded areas, mapped by a spatial overlay of observed flood extent <br> and gridded population | ||
+ | |''raster (Geotiff)'' | ||
+ | |- | ||
+ | |11. [[Affected Land Cover]] | ||
+ | |Land cover type flooded | ||
+ | |''raster (Geotiff)'' | ||
+ | |- | ||
+ | |} | ||
+ | |||
+ | |||
+ | The key specifications of the products are provided in the table below | ||
+ | |||
+ | {| class="wikitable" style="margin: auto;" | ||
+ | !colspan="2" |Input satellite data | ||
+ | |- | ||
+ | |Satellite sensor | ||
+ | |S-1 - Synthetic Aperture Radar (SAR) | ||
+ | |- | ||
+ | |Acquisition mode | ||
+ | |Interferometric Wide Swath (IW) | ||
+ | |- | ||
+ | |Data product | ||
+ | |Level-1 - Ground Range Detected (GRD) | ||
+ | |- | ||
+ | |Spatial sampling | ||
+ | |20 x 22 metres | ||
+ | |- | ||
+ | |Global revisit frequency | ||
+ | |Europe: ~1-3 days. Rest of the world: ~3-14 days, depending on location | ||
+ | |- | ||
+ | |SAR polarisation scheme | ||
+ | |VV + VH | ||
+ | |- | ||
+ | !colspan="2" |General product specifics | ||
|- | |- | ||
− | | | + | |Geographic coverage |
− | | | + | |Global |
|- | |- | ||
− | | | + | |Pixel size |
− | | | + | |20 metres |
|- | |- | ||
− | | | + | |Timeliness |
− | | | + | |<8 hours after S-1 image acquisition. |
|- | |- | ||
− | | | + | |Thematic accuracy |
− | | | + | |Target threshold of >70-80%, based on the Critical Success Index |
|- | |- | ||
|} | |} |
Latest revision as of 15:36, 4 February 2021
Note: this section provides a concise description of the products provided by the GFM.
For a more comprehensive documentation the reader is referred to the GFM Products Description Document.
The GFM makes available a full set of NRT flood mapping-related products as listed below:
Products | Description | Data Formats |
---|---|---|
1. S-1 Observed Flood Extent | Flooded areas mapped as the difference between S-1 observed water extent and the reference water mask. |
raster (Geotiff) and vector(shapefile) |
2. S-1 Observed Water Extent | Open and calm water mapped using S-1 SAR backscatter intensity. | raster (Geotiff) and vector(shapefile) |
3. S-1 Reference Water Mask | Normal (i.e. permanent, seasonal) water mapped using S-1 SAR backscatter intensity. | raster (Geotiff) and vector(shapefile) |
4. Exclusion Mask | Unclassified areas | raster (Geotiff) |
5. Uncertainty Values | Estimated uncertainty of flood mapping, for all areas outside exclusion mask | raster (Geotiff) |
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 |
raster (Geotiff) |
7. Sentinel-1 Metadata | Information on the acquisition parameters of the S-1 data used | KML |
8. Sentinel-1 Footprint | Image boundaries of the S-1 data used | KML |
9. Sentinel-1 Schedule | Next scheduled S-1 data acquisition | KML |
10. Affected Population | Number of people in flooded areas, mapped by a spatial overlay of observed flood extent and gridded population |
raster (Geotiff) |
11. Affected Land Cover | Land cover type flooded | raster (Geotiff) |
The key specifications of the products are provided in the table below
Input satellite data | |
---|---|
Satellite sensor | S-1 - Synthetic Aperture Radar (SAR) |
Acquisition mode | Interferometric Wide Swath (IW) |
Data product | Level-1 - Ground Range Detected (GRD) |
Spatial sampling | 20 x 22 metres |
Global revisit frequency | Europe: ~1-3 days. Rest of the world: ~3-14 days, depending on location |
SAR polarisation scheme | VV + VH |
General product specifics | |
Geographic coverage | Global |
Pixel size | 20 metres |
Timeliness | <8 hours after S-1 image acquisition. |
Thematic accuracy | Target threshold of >70-80%, based on the Critical Success Index |