Services

Our services support survey projects from start to finish: measurement, processing and consulting.

Compact USV during a bathymetric survey in an urban canal

Hydrographic surveys

Seabed surveys with various vessels and USVs, from singlebeam to multibeam: RTK-accurate, from fast depth verification to full bottom coverage, from a compact building pit to the longest river.

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Drone on a landing pad with the De Groot GeoServices logo, in the grass

Drone & topographic surveys

Centimetre accuracy from the air: orthophotos, 3D models and volume calculations, processed in the agreed coordinate system.

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Cabin screen showing position and excavation data, with a ship moored at the quay behind

Positioning systems

Positioning systems on dredgers and excavators: realtime excavation data within design, from hydraulic crane to offshore hopper dredger.

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Total station and measuring trolley on a crane rail along the quay

Crane Rail Surveys

We survey crane rails to the ISO standard, using a robotic total station and a measuring trolley. Our own software turns every survey into a standard, checked report.

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Two cows in a field next to staked-out pegs, one of which has been knocked over

Setting out & dimensional control

From design to the field: set out points and lines accurately with RTK-GNSS or a total station and verify as-built against the design.

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Reports and profiles on a dark blue background: an installation report, a calibration report and a fan of levee profiles

Data, software & reporting

From raw survey data to usable results. We work in the package you know, and where none exists we build the tool ourselves.

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Two long-reach excavators along a sheet pile wall, with a sand heap and a wind turbine in the background

Consulting

Strategic consulting to take your projects to the next level.

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