3D infrastructure inspection system
Markly

Markly is a system that streamlines the creation of drawings, quantity calculation documents, as-built drawings, and other deliverables after on-site surveys in infrastructure inspection, investigation, and general repair work by utilizing 3D data.

The system uses 3D data — such as point clouds or textured mesh data — captured with a smartphone or tablet. It automatically calculates numerical values for each type of damage, including crack length and the area of rebar exposure, delamination, or paint peeling.
It can automatically generate damage layout drawings, quantity calculation sheets, and other documents.
It also allows web-based sharing with infrastructure owners, making it easy to check site conditions remotely.
It streamlines the creation of deliverables.

Challenges of Traditional Methods

Markly enables automatic generation of quantity calculation sheets and CAD data.
By using 3D data instead of images, Markly streamlines labor-intensive tasks found in conventional methods, such as manual measurements and extensive photo documentation.

By separating point cloud capture from automated drawing creation and quantity calculation, on-site staff can focus on inspection and survey operations.

Markly enables the calculation of required quantities for construction quality control in spalling-prevention works. This includes measuring the area of damaged sections—such as exposed rebar, delamination, or paint peeling—and calculating crack lengths.
The calculated areas and crack lengths can be exported as formal reports.

After scanning repair areas to acquire 3D data, users can trace damaged areas directly on the data to create polylines and polygons and output them as 2D drawings.
Damage layout drawings (2D CAD drawings) can be automatically generated by marking damaged sections on the 3D data.
The calculated areas and crack lengths can be output as 2D CAD data or image files (detail drawings).

スクリーンショット 2025-06-04 104451

Damage assessment labels can be easily applied to each damaged area using a predefined list.
The damage assessment result list is based on a database of the “Standard Types of Targeted Damage” (Table 4.1.1) published in Chapter 2, Inspection and Diagnosis, of the Bridge Periodic Inspection Guidelines issued by the Road Bureau of Japan’s Ministry of Land, Infrastructure, Transport and Tourism (MLIT).

The area of any selected section can be calculated.
This function is applicable not only to concrete structures but also to repair areas on steel bridges.