Stream DP multiarray GPR on a suburban street in South Australia

Investigation

Understanding the site before work begins.

A digital site intelligence report from multiarray GPR, electromagnetic locating and reality capture. Findings with evidence. Coverage you can see. Unknowns written down. Based in Adelaide. Working Australia-wide.

Uncertainty

What we found. What we did not. What remains uncertain.

What we found

Utilities and features classified — type, depth, evidence attached.

What we did not find

Zero in a covered area is a result. It is written down as such.

What remains uncertain

Residual unknowns, stated plainly. Not buried in a footnote.

How confident we are

An Aus-OMI rating. Separate from AS 5488 quality level.

What should happen next

Where to expose, avoid, or proceed. The decision, not a maybe.

Acquired coverage of an investigation area

Coverage + limits

Completeness is visible rather than assumed.

Planned extent, acquired extent, processed extent, final interpreted. Exclusions, reduced-quality zones and no-response ground are named. If it was not covered, the report says so.

Integrated surface and subsurface environment

Integrated site

The visible site and the subsurface, brought together.

One coordinated view of surface structure, interpreted utilities, unknown features and critical zones — spatially related, not layered as an afterthought.

GPR B-scan — layered reflection
GPR hyperbola with pickTomographic time-slice of a large stormwater main

Direct evidence

From radar response to a defensible interpretation.

Each significant finding carries its evidence: the B-scan, the pick, the depth, the type. Interpretation confidence is rated. AS 5488 quality level is assigned feature by feature. The three are never collapsed into one number.

Reliability

Not every line carries the same level of evidence.

AS 5488 quality level

The evidence source: records, surface correlation, geophysical detection, or exposed verification. Assigned feature by feature. GPR or SLAM alone does not establish QL-A.

Interpretation confidence

How strongly the evidence supports the call. High is earned. It is never a substitute for quality level.

Positioning accuracy

Spatial uncertainty of the measurement. Processing consistency is not absolute position. Reported separately.

How we investigate a site

Spatial control, then evidence, then one environment.

  1. 01

    Establish spatial control

    Positioning confidence is set before anything is interpreted. Precision, registration and interpretation stay separate.

  2. 02

    Detect and investigate

    Multiarray GPR and electromagnetic locating — conductive, non-conductive, unknown. The ground is imaged, not guessed.

  3. 03

    Capture existing conditions

    Reality capture of the site as it is: surface, assets, geometry. Indoor and GPS-denied ground included.

  4. 04

    Interpret and correlate evidence

    Each significant finding is tied to a radar response, a depth, a type, a confidence. Methods check each other.

  5. 05

    Integrate into one spatial environment

    GPR, EMI and the site model in one coordinated frame — not three files that almost line up.

  6. 06

    Report findings, confidence and remaining uncertainty

    A digital site intelligence report plus the spatial package. What we found, what we did not, what remains uncertain, what should happen next.

Platform

The instruments behind the report.

IDS GeoRadar Stream DP

Multiarray GPR

IDS GeoRadar Stream DP

Thirty channels, dual polarisation (19 VV + 11 HH). Equalized scrambled Technology (EsT) holds depth and resolution in the same pass. One operator. uMap in the field.

CHCNAV RS10

Reality capture

CHCNAV RS10

GNSS RTK, laser SLAM and visual SLAM on one handheld. Site context where satellites drop out. The world the subsurface sits in, in the same frame.

IDS IQmaps

Processing

IDS IQmaps

The office layer. Real-time processing, tomographic slicing, 3D visualisation and georeferenced feature extraction. Radargrams become a coordinated model.

Digital record

The report is the front end of a reusable spatial package.

  • 01

    PDF report

    Decision support, communication, and the project record.

  • 02

    Interactive 3D

    Surface and subsurface in one environment, for review.

  • 03

    Classified utility models

    Communications, drainage, electrical, water, sewer, gas, unknown — for design coordination.

  • 04

    KML

    Lightweight spatial review.

  • 05

    Reality capture

    Site point cloud for context and measurement.

  • 06

    Project metadata

    Coordinate system, datum, accuracy statement, processing record.

Discuss a site

Next

Send the drawings.
We reduce uncertainty before works begin.

Corridor, precinct, brownfield or a street with no records. Brief us from Adelaide. We work Australia-wide.