Design & media
Extract flood extent from SAR backscatter imagery. Use when the user wants to analyze changes, detect hazards, or generate assessment reports.
Extract flood extent from SAR backscatter imagery. Use when the user wants to analyze changes, detect hazards, or generate assessment reports.
Extract flood extent from SAR backscatter imagery.
# Local file mode (backward compatible)
python scripts/flood_extent_mapping.py --sar sar.tif
python scripts/flood_extent_mapping.py --sar sar.tif --threshold -16
python scripts/flood_extent_mapping.py --sar sar.tif --output-dir my_output
# Auto-download mode — fetch Sentinel-1 GRD from Microsoft Planetary Computer
# (no API key required; one scene per invocation)
python scripts/flood_extent_mapping.py \
--bbox 116,39,117,40 \
--date-range 2024-06-01,2024-06-30 \
--output-dir my_output
When --bbox (or --aoi-file) and --date-range are provided, the skill
auto-downloads one Sentinel-1 GRD scene from the Microsoft Planetary
Computer STAC catalog (collection sentinel-1-grd). The downloaded file
is written to /downloaded/ and the SAR analysis runs on it
exactly as if a local file had been passed via --sar.
The output-manifest.json records data_source, collection, bbox,
date_range, and fetched_at whenever auto-download is used.
| Argument | Required | Default | Description |
|---|---|---|---|
--sar | One-of | — | Path to local SAR backscatter raster (dB, calibrated) |
--bbox | One-of | — | W,S,E,N in WGS-84; triggers auto-download |
--date-range | w/ bbox | — | START,END ISO-8601; triggers auto-download |
--aoi-file | No | — | GeoJSON Polygon / MultiPolygon (alternative to --bbox) |
--threshold | No | -15 | Water threshold in dB |
--output-dir, -o | No | flood-output | Directory to write outputs |
--synthetic | No | off | Use synthetic demo data (no real inputs) |
| File | Description |
|---|---|
flood-report.json | Machine-readable flood extent stats (water area, depth proxy) |
report.html | Human-readable HTML report |
output-manifest.json | Run metadata + result summary |
| Code | Meaning |
|---|---|
| 0 | Success |
| 2 | Argument error |
| 7 | Processing failure |
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.
基于 SAR 低后向散射特性的洪水范围制图：Otsu 阈值分割低 σ⁰ 水体 + 形态学去噪 + 可选 DEM 坡度排除，并矢量化为 GeoJSON。SAR flood extent mapping via Otsu thresholding of low backscatter, morphological cleanup and vectorization. 输出洪水二值 GeoTIFF + 面积统计 JSON + 范围 GeoJSON。
Analyze land subsidence from InSAR displacement data. Use when the user wants to analyze changes, detect hazards, or generate assessment reports.
Compute forest fire burn severity from pre/post-fire NIR and SWIR imagery using differenced Normalized Burn Ratio (dNBR). Classifies severity into unburned, low, moderate, and high categories. Use when the user wants to assess burn severity, map fire damage, or generate burn severity reports.
Detect forest disturbance from multi-temporal NDVI. Use when the user wants to analyze changes, detect hazards, or generate assessment reports.
基于 DEM 的 Bathtub 静态洪水淹没模拟，支持水文连通性约束（flood-fill）。Static bathtub flood inundation modeling from DEM with optional hydrological connectivity constraint. 输出淹没范围/水深 GeoTIFF + 面积体积统计 JSON。