Construction Verification

QA/QC in near real time

Conduct quality control checks every day

Improving QA practices with the latest technology

Construction experts estimate that rework and delays increase costs about 20% over budget. Traditional spot checking of completed work leaves verification gaps that can result in significant cost overruns and lost profits. Fortunately, the Topcon construction-verification solution can help.

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-1000 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


Robotic Total Station for Building Construction

Robotic total station and scanner in one

Robotic layout navigator for precise construction workflows.


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 analyze 3D point clouds from diverse 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

Collage Site
Collage Site

Field scanning control and processing software
Rugged Tablets
Rugged Tablets

Rugged tablets control total stations, GNSS receivers, scanners and data.
MAGNET Field Layout
MAGNET Field Layout

Guided layout field software

Insights & testimonials

Daytona Project Hits the Fast-Track

The one common tie that seems to bind avid GNSS users is the abundant number of ways they find...

Segmented Success

Laying Out Near the Beach

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