25 marquee operators · 21 countries · verified roster
Bayer · Pfizer · TATA · Adani · JSW · ISRO · Siemens · Bosch · DuPont · Mahindra · Hindalco · and others
Airborne and UAS capture for ground you cannot walk and areas too large to scan from a tripod.
Laser pulses return from the canopy and from the ground beneath it, which is why aerial LiDAR produces a bare-earth terrain model where photogrammetry produces a picture of the treetops. Terrain models, contours, volumes and clearance analysis, delivered in your coordinate reference system with accuracy verified against withheld check points.
The decision is driven by area, access and what you need to see through. Terrestrial scanning gives the highest accuracy and the best result inside congested plant, where line of sight is short and detail matters. It becomes uneconomic once the site is measured in square kilometres rather than square metres, and it cannot practically cover terrain that is steep, waterlogged, vegetated, live with plant traffic, or simply unsafe to walk.
The capability that distinguishes aerial LiDAR from aerial photogrammetry is vegetation penetration. A laser pulse returns from the canopy and from the ground beneath it, so the ground surface can be extracted under tree and scrub cover. Photogrammetry, which reconstructs from imagery, sees the canopy and nothing below it. For greenfield site selection, corridor routing, mine and quarry work and any terrain model over vegetated ground, that difference decides whether the deliverable is usable.
The trade is resolution and accuracy against coverage. Aerial capture is measured in centimetres where terrestrial is measured in millimetres, which is the correct tool for terrain, volumes and clearance, and the wrong tool for pipe rack geometry.
Chartered Engineer signed deliverables · airborne and UAS capture · routes to the 3D LiDAR practice lead within 24 hours.
Required accuracy and point density derived from the deliverable rather than assumed, which sets platform, sensor and flying height. Airspace permissions, site clearances and UAS operating approvals obtained ahead of mobilisation, and ground control planned and monumented.
Control and check points established by GNSS across the survey area, positioned so accuracy can be independently verified rather than only reported by the trajectory solution. Check points are withheld from the adjustment so the accuracy statement means something.
UAS-mounted LiDAR for defined sites and shorter corridors, airborne platform for large area and long linear capture, flown to the planned line spacing with overlap. Simultaneous imagery captured for classification and interpretation.
GNSS and inertial trajectory processed and the strips adjusted to the control network. The cloud is classified to separate bare earth from vegetation, buildings and structures, with manual QC over the areas that drive the deliverable.
Digital terrain and surface models, contours at your interval, cross sections and long sections, stockpile and excavation volumes against a reference surface, and clearance or encroachment analysis where the scope is a corridor. Delivered in your coordinate reference system with an accuracy report.
Aerial deliverables follow the geospatial accuracy and exchange standards your survey reviewers apply, alongside the operating rules for the airspace flown. Every deliverable signed by a Chartered Engineer (CEng MIE India).
Three landmark engagements from our verified roster · quantified outcomes, no client names disclosed without written permission.
Site of several square kilometres captured by airborne LiDAR where dense scrub made ground survey impractical. Bare-earth extraction produced a terrain model and contour set that supported earthworks quantification at concept stage.
Repeat UAS LiDAR flights over active stockpiles differenced against a reference surface to produce volumes for reconciliation, with each survey completed inside a single shift and without stopping stockyard traffic.
Corridor flown and classified to model conductor position against vegetation and ground, producing a clearance report that prioritised spans for vegetation management ahead of the pre-monsoon window.
Tell us your plant, region, and scope · a named Chartered Engineer responds within 24 hours.