---

name: land-subsidence-insar description: Analyze land subsidence from InSAR displacement data. Use when the user wants to analyze changes, detect hazards, or generate assessment reports.

Land Subsidence InSAR

Analyze land subsidence from InSAR displacement data.

CLI Usage

python scripts/land_subsidence_insar.py --displacement disp.tif
python scripts/land_subsidence_insar.py --displacement disp.tif --reference baseline.tif
python scripts/land_subsidence_insar.py --displacement disp.tif --output-dir my_output

Data Download

This skill can auto-fetch a Sentinel-1 GRD scene from the Microsoft Planetary Computer when given a bounding box + date range. The downloaded asset is then passed through --displacement (note: real InSAR displacement products require additional SAR processing; the raw backscatter/intensity is only a rough proxy for subsidence hotspots — see Limitations below).

# Fetch a S1 GRD scene for the Beijing area and analyze
python scripts/land_subsidence_insar.py \
  --bbox 116.4,39.9,116.42,39.92 \
  --date-range 2024-06-01,2024-06-30 \
  --output-dir ./subsidence-output

# Or via an AOI polygon file
python scripts/land_subsidence_insar.py \
  --aoi-file ./aoi.geojson \
  --output-dir ./subsidence-output

The PYTHONPATH must include the parent of _geoskill_data_fetcher/ (the same directory the 50 skills live in). Set it once:

export PYTHONPATH="/path/to/行业Skill创意-20260727"

Parameters

Argument	Required	Default	Description
--displacement	Yes*	—	Path to InSAR displacement raster (mm, positive = uplift, negative = subsidence)
--reference	No	—	Optional reference displacement raster for differential analysis
--bbox	No	—	Bounding box W,S,E,N — auto-downloads S1 GRD from MPC
--date-range	No	—	Date range START,END (ISO-8601) for auto-download
--aoi-file	No	—	Path to AOI GeoJSON polygon for auto-download
--output-dir, -o	No	subsidence-output	Directory to write outputs

*Required unless --synthetic or --bbox+--date-range is supplied.

Output

File	Description
subsidence-report.json	Machine-readable subsidence stats (max/min/mean rate, affected area)
report.html	Human-readable HTML report
output-manifest.json	Run metadata + result summary

Exit Codes

Code	Meaning
0	Success
2	Argument error
7	Processing failure