The plans show the public networks, roughly. They do not show the private drain, the abandoned line, the old tank or the foundation of the building that stood here before. We find them, mark them on the ground and give you their depth.
Typical depth and the antenna we bring. The ground decides the rest; we say so before quoting.
Metal, concrete and clay pipes, ducts and cable runs before excavation.
Buried fuel or water tanks and their covers under asphalt or paving.
Footings and wall lines of demolished or undocumented buildings.
Settlement voids, washed-out zones, cellars and residual cavities.
Service galleries and deep pipelines, located after a short test section.
Deep or large targets start with a feasibility test: a short test section decides whether a full survey makes sense.
In Belgium the network operators' plans are requested through KLIP in Flanders and KLIM-CICC in Wallonia and Brussels. Ask for them first. Radar is for what the plans do not settle.
The public networks declared by their operators: gas, water, electricity, telecom and sewers, with an indicative position.
Private pipes and drains on the plot, abandoned lines, old tanks and foundations, and the real position and depth of what is drawn.
We survey with the plans in hand, confirm or correct the positions on the ground, and mark what was on no plan.
Below about 50 mm, or empty, they often give no usable reflection.
They absorb the signal. Reach can drop to a third of what the same antenna achieves in sand.
It comes from the wave velocity in your soil. We calibrate where we can and state the uncertainty.
Below a few metres the ground sets the limit; we start with a test section at 200 MHz.
Client names, addresses and locations withheld.
Profiles along the street, tied to the sewer manholes visible on the surface; pipes picked on each radargram and plotted on a depth map next to the road-surface image, so it is clear which manhole feeds which run. Median depth 1.37 m, standard deviation 0.52 m — a spread worth knowing before deciding where to dig.
Forty 200 MHz profiles over a plot crossed by a masonry gallery announced at 2.5–3 m. The wave velocity was calibrated from the data (0.113 m/ns) and the useful depth measured on site (2.83 m), so the target sat right at the limit. The gallery was located on 8 profiles from a local break in the layering, not a textbook hyperbola: its axis runs 3.4 m from the route drawn on the plan, parallel to it within 0.5°, at 2.46–2.92 m depth, inside the no-build zone. The report states the fit scatter (± 0.19 m) and what it does not cover.
Time slices at 0.5 m overlaid on the site map: two parallel pipes follow the road and a third crosses them — a plan the works team could use directly.
| Site | Task | Antenna · data | Status |
|---|---|---|---|
| Utility gallery | Locate a buried service gallery along its presumed route | 200 MHz · 40 profiles | Surveyed · gallery located |
| Urban utility network | Pipe inspection | — | Surveyed |
| Industrial site | Pipe inspection, manhole-tied profiles | 70 profiles | Surveyed |
| Urban road | Pipe inspection with a commercial multichannel array system | 8 channels · positioned | Surveyed |
| Utility network | Utility pipe mapping in gridded swaths with a commercial multichannel array system, delivered as a pipe depth map | 10 channels · gridded swaths | Surveyed |
| Electrical substation | Locating the conductors of the grounding grid with a commercial multichannel array system | Gridded survey | Surveyed |
Status: Surveyed — carried out by us on site. Commissioned — ordered by the client, survey still to be carried out.
From €1,200 excl. VAT for a single target, such as a tank cover or one or two manholes; from €2,000 excl. VAT for one plot or line. Several zones or industrial sites are quoted.
Every quote lists field time, processing, reporting and travel separately.
Tell us the site and the target. An engineer replies within one working day, with a fixed price or a question.
* required
Yes. Request them first: they list the public networks. Radar then checks positions and depths on the ground and finds what is on no plan.
Often, with limits. Plastic pipes under about 50 mm, or empty ones, may give no usable reflection; the report gives a confidence grade for each target.
Typically 0.3 to 4 m with the 400 and 200 MHz antennas, depending on the soil. For deep pipelines and galleries we start with a test section.
Yes. Pipes, cables and other findings are marked on site with spray paint or pegs, and this is included in the survey price. The plan follows as a PDF in Belgian Lambert 2008 coordinates.
Layer thickness, debonding, voids and subsidence under roads and paved areas.
Rebar, slab thickness, voids and moisture in slabs, car parks, basements, bridge decks and tunnel linings.
Coarse roots around protected or valuable trees, mapped without digging.
Old foundations, wall lines, graves and buried structures, before excavation or restoration.