Infrastructure and construction
The contractor's progress report and the satellite's rarely agree.
Contractors report progress on paper. Satellites report it in pixels.Construction progress verification from optical imagery
Very-high-resolution optical satellites can document physical change at construction sites independently of site access or contractor reporting, comparing observed ground conditions against planned build schedules with sub-metre precision.
Maxar WorldView LegionAirbus Pléiades NeoPlanet SuperDove
The ground moves slowly. Undetected, it moves expensively.InSAR measurement of urban ground subsidence
Interferometric SAR detects millimetre-scale urban subsidence from groundwater extraction, tunnelling and fill compaction. This page explains PS-InSAR and SBAS processing, their honest limits, and the satellite archives that make city-scale monitoring practical.
Sentinel-1 (C-band, 5.6 cm wavelength)COSMO-SkyMed (X-band, 3.1 cm wavelength)TerraSAR-X / TanDEM-X (X-band, 3.1 cm wavelength)
Bridges move every day. The question is whether that movement is normal.Bridge deformation monitoring with InSAR
Spaceborne SAR interferometry can resolve millimetre-scale deformation on individual bridge decks, separating daily thermal expansion from the slower, more dangerous signals of structural settlement or fatigue.
TerraSAR-X Staring SpotlightCOSMO-SkyMed Second Generation (CSG)ICEYE X-band SAR
A dam moves millimetres before it fails. SAR catches both.Dam and embankment deformation detection with SAR
Satellite SAR can detect sub-centimetre surface displacement on dam faces and embankments weeks before visible distress appears. This page explains which sensors work, where coherence fails, and how satellite data integrates with piezometer readings.
Sentinel-1 (C-band, 5.6 cm wavelength)ALOS-2 PALSAR-2 (L-band, 23.6 cm wavelength)ICEYE X-band constellation
Hundreds of kilometres of corridor. Cloud hides progress. SAR does not.Road and rail corridor construction monitoring
Optical and SAR satellites track earthwork, vegetation clearance and pavement progress along road and rail corridors. Where tropical cloud blocks optical sensors, Sentinel-1 backscatter change reveals surface transitions from bare earth to compacted sub-base.
Planet SkySatSentinel-2 MSISentinel-1 SAR (C-band)
Dredges move millions of tonnes. Satellites watch every cubic metre.Port expansion and nearshore bathymetric change detection
Multispectral and SAR satellites track dredging progress, reclamation fill and shoreline advance at port development sites. Satellite-derived bathymetry from blue-green band physics can estimate water depth to roughly 5–10 metres in clear conditions, with hard limits where turbidity takes over.
Sentinel-2 MSIMaxar WorldView-2Landsat 9 OLI
Runways grow slowly. Satellites notice before the NOTAM arrives.Airport construction activity and airside expansion analysis
Very-high-resolution optical satellites can track runway extensions, apron expansions and terminal builds at civil and military airports with sub-metre clarity. This page covers sensor selection, resolution thresholds, object detection methods and the legal context for imaging sensitive airside facilities.
Maxar WorldView LegionAirbus Pléiades NeoPlanet SkySat
Disbursement conditions are written in words. Verification happens in pixels.Satellite-based project-finance covenant monitoring
Lenders and development-finance institutions increasingly use satellite imagery as an independent check that physical milestones have been reached before releasing loan tranches. This page explains what imagery can and cannot prove, and which sensors are fit for evidentiary use.
Planet SuperDove (PlanetScope)Airbus Pléiades NeoMaxar WorldView Legion
Cadastral maps are missing. The terrain and the streetlights are not.Urban utilities corridor planning with satellite data
Satellite-derived land cover, elevation models and nighttime-light data can screen feasible utility corridors before a survey crew sets foot on the ground, cutting wasted mobilisation in rapidly urbanising areas where base maps are unreliable or absent.
Sentinel-2 MSITanDEM-X DSMVIIRS Day/Night Band (DNB)
The ground moves before the damage appears. InSAR catches both.Surface settlement monitoring above tunnel boring operations
Persistent-scatterer InSAR can resolve millimetre-scale settlement above a tunnel boring machine before visible cracking begins, giving engineers an independent check on Peck-curve predictions and early warning of unexpected ground response.
Sentinel-1 (C-band SAR)TerraSAR-X / TanDEM-X (X-band SAR)COSMO-SkyMed Second Generation (X-band SAR)
Permits are optional. Satellites are not.Unauthorised construction and land encroachment detection
Time-series optical and SAR imagery can flag unauthorised structures, rights-of-way encroachments, and exclusion-zone violations weeks before a ground inspector arrives. Resolution, cloud cover, and seasonal vegetation all shape what the data can and cannot prove.
Planet SuperDoveSentinel-1 SAR (C-band, ESA)Maxar WorldView Legion
A building can lean a millimetre and look perfectly straight.High-rise building tilt and differential settlement from SAR
Multi-temporal SAR interferometry can resolve differential displacement between adjacent points on a tall building facade to sub-millimetre precision, revealing tilt or foundation settlement invisible to conventional survey. This page explains the geometry, the sensors capable of doing it, and where the method breaks down.
TerraSAR-X Staring SpotlightCOSMO-SkyMed Second Generation (CSG)ICEYE X-band SAR
Concrete cures hot. Satellites notice before the inspector arrives.Construction site thermal activity and curing heat signature analysis
Spaceborne thermal infrared sensors detect the heat released by large-scale concrete curing, asphalt laying and plant commissioning, offering an activity signal that works through haze and at night. Resolution limits are real: individual pours are invisible, but block-scale thermal anomalies are not.
Landsat 9 TIRS-2ECOSTRESS (ISS-mounted)Sentinel-3 SLSTR
Vessels declare their position. Physics confirms whether they lied.Offshore platform jacket installation and marine construction monitoring
SAR and very-high-resolution optical imagery provide independent verification of heavy-lift and lay-vessel positioning during offshore jacket and pipeline installation, cross-referenced against AIS to resolve vessel identity at declared coordinates.
Sentinel-1 C-band SAR (ESA)ICEYE X-band SARPlanet SkySat
A wall can move two millimetres. InSAR notices before the engineer does.Retaining wall lateral displacement from InSAR
Repeat-pass SAR interferometry detects millimetre-scale displacement in retaining walls and sheet-pile structures, but line-of-sight geometry means lateral motion is only partially captured. Combining ascending and descending passes resolves the ambiguity; inclinometers resolve the rest.
Sentinel-1 (C-band, ESA)COSMO-SkyMed (X-band, ASI)TerraSAR-X / TanDEM-X (X-band, DLR)
Clouds stop cameras. SAR watches panels go in regardless.Solar farm construction progress from SAR backscatter
Utility-scale solar sites are built in months, often in climates where cloud cover makes optical monitoring unreliable. C-band and X-band SAR backscatter responds to the specular and double-bounce signatures of panel arrays, enabling weekly progress curves through any weather.
Sentinel-1 (C-band, 5.405 GHz)TerraSAR-X / TanDEM-X (X-band, 9.65 GHz)ICEYE (X-band)
Scour happens in hours. The seabed keeps no log.Offshore wind turbine foundation scour detection
Seabed scour around offshore wind foundations can undermine structural integrity within a single storm. Repeat SAR imagery and multispectral bathymetric inversion let operators detect the surface signatures of scour between physical dives.
Sentinel-1 (C-band SAR, ESA)TerraSAR-X / TanDEM-X (X-band SAR, Airbus)Sentinel-2 (multispectral, ESA)
A pipeline corridor is visible from orbit long before the pipe is buried.Pipeline right-of-way construction surveillance
Satellite optical and SAR imagery tracks every phase of pipeline construction, from initial clearing through reinstatement, flagging encroachment and reinstatement failures that ground inspectors routinely miss.
Planet SkySatAirbus Pléiades NeoSentinel-2
Embankments move before they fail. Radar sees the movement.Mine tailings dam surface deformation monitoring
InSAR techniques applied to tailings storage facilities can detect millimetre-scale precursor deformation weeks before visible distress, giving operators and regulators a measurable early-warning signal that visual inspection alone cannot provide.
Sentinel-1 (ESA)COSMO-SkyMed (ASI)TerraSAR-X / TanDEM-X (DLR)
The schedule says on track. The satellite disagrees.Stadium and arena construction milestone tracking
Very-high-resolution optical imagery from Pléiades Neo, SkySat and WorldView-3 can verify discrete construction milestones against project schedules, supporting lender draw-down decisions with independent, dated evidence.
Airbus Pléiades NeoMaxar WorldView-3Planet SkySat
New land appears on maps. Satellites record exactly when.Coastal land reclamation volumetric change detection
Multispectral time-series and SAR intertidal analysis let analysts measure the rate, extent and approximate volume of artificial land creation from orbit, with archives stretching back to 1984 and boundary precision reaching sub-metre scale.
Sentinel-2 (ESA)Landsat 8 and 9 (USGS/NASA)Sentinel-1 (ESA C-band SAR)
The track looks straight. The ground beneath it disagrees.Railway track geometry subsidence from InSAR
Persistent-scatterer InSAR detects millimetre-scale differential settlement along railway alignments using rail infrastructure as coherent radar targets, giving asset managers early warning before geometry degradation triggers speed restrictions.
TerraSAR-X / TanDEM-XCOSMO-SkyMed Second GenerationSentinel-1 (A/B)
Cranes are honest. Planning permissions and GDP revisions are not.Construction crane census and activity indexing
Tower crane counts derived from sub-metre satellite imagery give economists and investors a near-real-time proxy for active construction investment, months before official statistics catch up. The method is specific, repeatable and openly auditable, though it misses underground work and flatters stalled sites.
Maxar WorldView-3Airbus Pléiades NeoPlanet SkySat
Cable ships leave no AIS trail on the seabed. Sediment does.Subsea cable route seabed disturbance detection
Multispectral water-quality indices and SAR surface roughness anomalies can detect turbidity plumes and seabed disturbance from cable-laying operations in shallow water, with honest limits in deep routes where no surface signature exists.
Sentinel-2 MSISentinel-1 SAR C-bandPlanet SuperDove
Concrete reflects less than grass. Bare soil reflects less than both.Urban heat island intensification from construction albedo change
Large-scale construction strips vegetated surfaces and replaces them with low-albedo impervious cover, measurably raising daytime land surface temperature. Landsat thermal infrared and Sentinel-2 multispectral time-series make that thermal trajectory visible phase by phase.
Landsat 8 and 9 (TIRS)Sentinel-2 MSIECOSTRESS (ISS-mounted)
Falsework vanishes overnight. The satellite record does not.Bridge falsework and formwork monitoring during construction
High-cadence optical and SAR imagery provides an independent, timestamped record of falsework erection, deck pours and striking, giving project managers and insurers visibility that site diaries alone cannot guarantee.
Planet SkySatAirbus Pléiades NeoICEYE X-band SAR
Rock moves. Satellites measure exactly how much.Quarry blast and extraction volume estimation from optical stereo
Repeat tri-stereo photogrammetry from very-high-resolution optical satellites produces digital surface models accurate to 20–50 cm vertically, giving royalty auditors and regulators an independent record of how much material left the pit.
Airbus Pléiades NeoMaxar WorldView-3Airbus SPOT 6/7
Piling shakes buildings. Coherence maps show exactly which ones.Construction vibration impact proxy from SAR coherence
SAR interferometric coherence drops when millimetre-scale surface change disrupts phase relationships between repeat passes. That decorrelation, mapped spatially, acts as an indirect proxy for vibration disturbance zones around active piling, blasting or heavy plant operations.
Sentinel-1 (C-band, 5.6 cm wavelength)TerraSAR-X / TanDEM-X (X-band, 3.1 cm wavelength)COSMO-SkyMed Second Generation (X-band)
An embankment looks solid until the millimetres tell a different story.Flood defence embankment condition and settlement monitoring
Persistent-scatterer InSAR detects millimetre-scale settlement on flood embankments years before visible failure, but vegetated earthworks are sparse in coherent scatterers and need augmentation. This page explains the physics, the workarounds and the honest limits.
Sentinel-1 (C-band SAR, ESA)COSMO-SkyMed (X-band SAR, ASI)TerraSAR-X / TanDEM-X (X-band SAR, DLR/Airbus)
Buildings go up fast. Knowing which ones are actually live is harder.Data centre campus construction tracking for investment intelligence
Very-high-resolution optical and thermal infrared imagery can track hyperscale data centre construction from groundbreak to energisation, giving investors and energy planners an independent view of capacity timelines. Internal IT fit-out remains invisible from orbit.
Maxar WorldView-3Airbus Pléiades NeoPlanet SkySat
Ground goes down during excavation. Sometimes, inconveniently, it goes up.Surface heave above deep basement excavation from InSAR
Deep basement excavations relieve overburden stress and disturb groundwater, producing upward ground movement that can crack adjacent structures. Short-interval X-band InSAR time-series resolves this heave at millimetre scale across dense city blocks.
TerraSAR-X / TanDEM-XCOSMO-SkyMed Second GenerationICEYE
A pile of aggregate has a shadow. That shadow is data.Construction material stockpile volume tracking from stereo imagery
Repeat stereo satellite imagery can estimate stockpile volumes of aggregate, sand and prefabricated components to within a few percent, giving supply-chain auditors and insurers an independent check without setting foot on site.
Airbus Pléiades NeoMaxar WorldView-3Planet SkySat
Towers go up in sequence. SAR sees each one arrive.High-voltage transmission line corridor construction monitoring
Metallic transmission towers produce unmistakable double-bounce signatures in SAR imagery, allowing tower-by-tower erection verification. Sentinel-2 NDVI time-series independently confirms vegetation clearance along the right-of-way. Together they give project owners and lenders an objective construction record without site visits.
Sentinel-1 (C-band SAR)TerraSAR-X (X-band SAR)Sentinel-2 MSI (optical multispectral)
Pumps lower the water table. The ground around them moves.Cofferdam dewatering and foundation pit settlement from InSAR
Cofferdam dewatering consolidates surrounding soils, settling adjacent structures by millimetres that matter. Sentinel-1 and COSMO-SkyMed interferometric stacks resolve that motion in space and time, before cracks appear.
Sentinel-1 (ESA, C-band, 5.6 cm wavelength)COSMO-SkyMed (ASI, X-band, 3.1 cm wavelength)TerraSAR-X / TanDEM-X (Airbus, X-band)
Segments leave the yard before the schedule says they should.Precast concrete yard inventory monitoring from optical and SAR
Precast concrete yards hold the physical evidence of construction schedule health. Automated counting of segment stacks from Pléiades Neo optical imagery and Capella Space X-band SAR backscatter can track throughput without a single site visit.
Pléiades Neo (Airbus)Capella Space X-band SARSPOT 7 (Airbus)
Fill settles for decades. Foundations cannot wait that long.Post-reclamation land consolidation settlement monitoring
Hydraulically placed fill consolidates unevenly for years after reclamation ends. Persistent-scatterer and small-baseline InSAR time-series on Sentinel-1 and ALOS-2 PALSAR-2 map settlement velocity fields and separate consolidation trends from seasonal groundwater signals, but decorrelation on bare fill demands careful network design.
Sentinel-1 A/B (ESA)ALOS-2 PALSAR-2 (JAXA)COSMO-SkyMed SkyMed-2 (ASI)
The pump stops on site. The subsidence bowl keeps growing.Regional aquifer drawdown from construction dewatering detected by InSAR
Large construction dewatering schemes can depress piezometric levels across an entire urban district, causing subsidence that damages third-party buildings and infrastructure far outside the site fence. Sentinel-1 time-series InSAR maps these bowls at millimetre scale, but separating dewatering from other abstraction requires ancillary piezometer data.
Sentinel-1 (ESA, C-band, 5.6 cm wavelength)TerraSAR-X / TanDEM-X (Airbus, X-band, 3.1 cm wavelength)COSMO-SkyMed (ASI, X-band)
The yard doesn't lie: modules accumulate before schedules slip.Modular and volumetric building factory output tracking
Offsite construction yards hold the truth about factory output and project delivery. Very-high-resolution tasked imagery from Pléiades Neo and SkySat, analysed with object-based methods, can count and classify volumetric modules before a single delivery note is signed.
Pléiades Neo (Airbus)SkySat (Planet)Maxar WorldView Legion
The slope moves before it fails. Radar sees it first.Highway cut-slope stability monitoring during road construction
Freshly excavated cut slopes are the leading cause of construction-phase landslide fatalities on mountain roads. Short-interval SAR coherence and offset-tracking methods can detect millimetre-scale pre-failure creep weeks before collapse, but geometry and shadow zones impose real limits every project must plan around.
Sentinel-1 (ESA, C-band, 5.6 cm wavelength)ALOS-2 PALSAR-2 (JAXA, L-band, 23.6 cm wavelength)COSMO-SkyMed (ASI, X-band, 3.1 cm wavelength)
Floodlights cannot hide behind access restrictions or cloud cover.Nighttime light intensity as a construction activity proxy
Round-the-clock construction leaves a measurable light signature in low-light satellite imagery. VIIRS Day-Night Band and Luojia-1 data turn that signature into an independent activity index, though urban adjacency and seasonal darkness complicate the reading.
VIIRS Day-Night Band (Suomi NPP / NOAA-20)Luojia-1 (Wuhan University)DMSP-OLS archive (NOAA)
Concrete hides its heat. Thermal infrared does not.Mass concrete curing thermal anomaly monitoring for dams
Hydration of mass concrete in gravity and arch dams generates internal heat that can crack the structure if uncontrolled. Satellite and airborne thermal infrared sensors can track surface temperature gradients as a proxy for curing progress, with honest caveats about pixel size.
Landsat 8/9 TIRS (USGS/NASA)ECOSTRESS (NASA/ISS)ASTER TIR (NASA/METI)
Contractors report progress. Spoil heaps report the truth.Spoil heap growth and volume estimation during tunnelling
Tunnel spoil heaps grow in direct proportion to excavation advance. Tri-stereo DSM differencing and SAR-based height estimation let planners and project financiers verify contractor progress claims and licence compliance from orbit.
Pléiades Neo tri-stereo (Airbus)TerraSAR-X / TanDEM-X (Airbus)SPOT 6/7 stereo (Airbus)
Ground hardens quietly. Downstream flooding announces it loudly.Impervious surface expansion and stormwater runoff risk from construction
As construction sites compact and pave, peak runoff rises faster than most site managers expect. Multispectral time-series from Sentinel-2 and Planet SuperDove can track impervious surface fraction week by week, giving regulators and developers early warning before watercourses breach compliance thresholds.
Sentinel-2 MSI (ESA)Planet SuperDoveLandsat 8/9 OLI (USGS/NASA)