Construction Verification

Move from think to know

Everyday construction verification systems

Conduct Q&A checks on a daily basis

Verify your work before you leave for the day

Reduce risk of rework

Increase profitability

Reduce schedule delays

About the workflow

This solution streamlines as-built 3D data and QA/QC workflows to identify construction errors and variances, almost in real-time. The GTL adds the power of laser scanning to a robotic total station so you can capture the as-built data with the same instrument you use for layout. Combine the GTL with Verity’s automated QA/QC workflow to compare the as-built data against the BIM design model and quickly spot variances—so you can check all your work every day and catch errors faster.

Chart showing Topcon construction verification workflows take 10% of the time of traditional verification workflows

Comparing the scan data with the BIM model enables construction-verification workflows that are up to 10 times faster than traditional spot-checking methods.

Market segments

Warehouse ducting

Mechanical, electrical, and plumbing

Structural steel frame at a new building construction site

Structural and
secondary steel

Inside a concrete structure

Structural concrete and floor flatness and levelness

Machinery inside a plant

Plant and equipment installation

Worker verifying as-built conditions

Layout and

Crane installing prefabricated decking

Prefabricated and

The complete solution

The workflows that control and manage data and deliverables set the GTL solution apart

GTL scanning robotic total station and FC-6000 ruggedized field controller in front of a computer monitor

The GTL solution replaces spot checks with a revolutionary process that does construction verification in hours instead of days, dramatically reducing errors and cost.

What is Construction Verification?

MAGNET and GT series building construction testimonial

Workflow benefits

GTL scanning robotic total station creating a point cloud

Verify the accuracy of recently installed work

This solution compresses layout, 3D scanning, and data processing into just a few steps. The result is a fast construction QA/QC workflow you can use to verify 100% of your recent work in the time it would take to spot check about 5% of that work using traditional methods.

GTL-1200 scanning robotic total station

Reduce rework, redesign, and other project costs

The rapid QA workflow identifies construction mistakes before they become expensive problems. The GTL-1200 combines layout and scanning functionality into a single instrument, eliminating the costs of buying and managing separate equipment, extra training, and larger on-site crews.

Graphic comparing as-built beam to plan

Get more accurate quality assessments

Most 3D QA/QC software relies on visual heat maps to display variances. Verity’s sophisticated computer-vision algorithms also calculate quantitative-variance data for each individual element. This provides a far more accurate, detailed quality check of the project’s conformance to the design.

Graphic showing plan updates in Navisworks

Automatically update as-built models in Autodesk®️ Navisworks®️

With a single click, update coordination models in Navisworks to reflect real-world conditions. Export point clouds for out-of-tolerance elements to the proper design platform so subcontractors can make updates quickly.

Graphic showing laptop and mobile phone sharing Navisworks and Verity data via the cloud

Share findings with all stakeholders

Collage Web offers a user-friendly online interface for viewing point clouds for collaboration with stakeholders.

How does it work?



Digital building plan and point cloud


Comparison of plan to as-built

As-Built & Verify

Download GTL Construction Verification Brochure

GNSS Radios
GNSS Radios

Extend your GNSS network range with a UHF radio


Robotic total station for vertical construction


This rugged, versatile laser scanner series works in all weather.

Survey style laser scanner

MAGNET Collage Web
MAGNET Collage Web

Cloud platform to publish and share 3D reality capture data
MAGNET Collage
MAGNET Collage

Process, combine and analyse 3D point clouds from multiple sensors
ClearEdge3D EdgeWise
ClearEdge3D EdgeWise

Automated building modeling and object recognition software
ClearEdge3D Verity
ClearEdge3D Verity

Construction verification software
ClearEdge3D Rithm
ClearEdge3D Rithm

Analyze floor flatness, levelness, heat maps and contours

Rugged Tablets
Rugged Tablets

Rugged tablets control total stations, GNSS receivers, scanners and data.
Collage Site
Collage Site

Field scanning control and processing software
MAGNET Field Layout
MAGNET Field Layout

Guided layout field software

Insights & testimonials

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