Urban DeformWatch

Satellite InSAR analysis detects millimeter-scale ground movements under urban infrastructure to prevent structural failures, optimize maintenance, and ensure public safety.

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How does it work?

Traditional inspections and spot surveys often miss gradual subsidence and heave beneath roads and buildings, leading to unplanned repairs and safety risks. InSAR provides frequent, high-precision surface deformation maps across entire urban areas, enabling early detection and targeted maintenance to reduce costs and hazards.

Early Risk Detection: Continuous InSAR monitoring reveals subsidence trends before visible signs appear. Early warnings allow strategic repairs to minimize damage and safety hazards.
Wide-Area Coverage: Satellite-based InSAR covers entire cities in a single pass. This eliminates gaps inherent in point measurements and reduces survey time.
Millimeter Precision: InSAR resolves surface movements down to millimeter scale over large areas. High sensitivity supports detection of subtle deformation that precedes structural failures.
Cost Efficiency: Automated InSAR analysis reduces reliance on expensive ground sensors and manual surveys. Lower operational costs enable more frequent assessments.
Trend Analysis: Time-series deformation maps reveal long-term subsidence patterns and seasonal effects. This data supports predictive maintenance and infrastructure planning.
System Integration: InSAR outputs integrate with GIS and asset management platforms via APIs. Seamless data delivery streamlines workflows for urban planners and engineers.

Frequently asked questions

Have a different question and can’t find the answer you’re looking for? Reach out to our support team by sending us an email and we’ll get back to you as soon as we can.

How does InSAR monitoring compare to GNSS surveys?: InSAR offers spatially continuous deformation data across entire urban areas, while GNSS provides high-accuracy point measurements. Combining both can enhance validation and interpretability.
Why is InSAR popular for infrastructure assessments?: Its ability to detect millimeter-level ground movements over wide areas with minimal field deployment makes it efficient. Urban planners favor InSAR for early risk identification and resource optimization.
What are common alternatives to InSAR for ground deformation monitoring?: LiDAR scanning, leveling surveys, and tiltmeters are often used but require extensive field work and offer limited spatial coverage. In contrast, InSAR delivers broad-area data without ground access.
Can InSAR detect deformation beneath buildings or tunnels?: Yes, InSAR measures surface displacement regardless of infrastructure type, revealing subsidence under roads, buildings, and underground structures. Interpretation may require coupling InSAR data with structural models.
How frequently can InSAR-based deformation maps be updated?: Update intervals depend on the satellite revisit frequency, typically ranging from days to weeks. Rapid-repeat satellites can provide weekly or even sub-weekly deformation products.
What are limitations of InSAR monitoring in urban areas?: Dense vegetation and water bodies can reduce coherence and affect measurement quality. Atmospheric artefacts may introduce noise, necessitating correction methods or complementary data sources.

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