Extract flood extent from SAR backscatter imagery. Use when the user wants to analyze changes, detect hazards, or generate assessment reports.
1 installs
Documents
Geoskill: Flood Impact Assessment
Try itOverlay flood extent with population, buildings, roads, and cropland to estimate affected objects and generate impact reports. Use when the user wants to assess flood impact, count affected population/roads/buildings, or generate flood impact summaries from a flood extent raster.
What it does
Overlay flood extent with population, buildings, roads, and cropland to estimate affected objects and generate impact reports. Use when the user wants to assess flood impact, count affected population/roads/buildings, or generate flood impact summaries from a flood extent raster.
The skill document
Flood Impact Assessment
Combines flood extent raster with exposure data (population, roads, buildings) to estimate affected objects.
Trigger
Use when the user wants to:
- Assess flood impact on population/infrastructure
- Count affected people, roads, buildings
- Generate flood impact reports
- Combine flood extent with exposure data
CLI Usage
# Local file mode (backward compatible)
python scripts/flood_impact_assessment.py --flood-raster flood.tif
python scripts/flood_impact_assessment.py --flood-raster flood.tif --population-raster pop.tif
python scripts/flood_impact_assessment.py --flood-raster flood.tif --population-raster pop.tif --roads-file roads.geojson
# Auto-download mode — fetch Sentinel-1 GRD from Microsoft Planetary Computer
# (population raster is synthesized bbox-aware; WorldPop is not on MPC)
python scripts/flood_impact_assessment.py \
--bbox 116.4,39.6,116.6,39.8 \
--date-range 2024-06-01,2024-06-30 \
--output-dir my_output
Data Download
When --bbox (or --aoi-file) and --date-range are provided, the skill
auto-downloads a Sentinel-1 GRD scene (collection sentinel-1-grd) from the
Microsoft Planetary Computer STAC catalog. Because WorldPop is not exposed
via MPC STAC, the population raster is synthesized to match the same
bbox/crs. The output manifest records data_source, collection,
bbox, date_range, and fetched_at whenever auto-download is used.
Output
| File | Description |
|---|---|
report.html | HTML impact report |
impact-report.json | Detailed results JSON |
output-manifest.json | Machine-readable manifest |
Exit Codes
| Code | Meaning |
|---|---|
| 0 | Success |
| 2 | Argument error |
| 7 | Processing failure |
Parameters
| Flag | Type | Default | Required | Description |
|---|---|---|---|---|
--flood-raster | path | None | (yes unless --synthetic) | Flood extent raster (GeoTIFF) |
--population-raster | path | None | no | Population raster (WorldPop GeoTIFF) |
--roads-file | path | None | no | Roads vector (GeoJSON/Shapefile) |
--buildings-file | path | None | no | Buildings vector (GeoJSON/Shapefile) |
--confidence-threshold | float | 0.5 | no | Flood confidence threshold (range 0.0–1.0) |
--synthetic | flag | False | no | Run with synthetic demo data (no real inputs needed) |
--output-dir / -o | path | flood-impact-output | no | Output directory |
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