Construction and Surveying Productivity Improvement Expo Exhibit Content & Highlights: LRTK Transforms Job Sites with High-Precision Positioning × AR Construction Support

What the Construction and Surveying Productivity Improvement Expo Is

The Construction and Surveying Productivity Improvement Expo (commonly: CSPI-EXPO) is one of Japan’s largest trade shows specializing in the construction and surveying industries. Held annually at Makuhari Messe, it brings together productivity-enhancing solutions using the latest technologies such as construction DX and i-Construction. The venue features indoor and outdoor demo areas with live demonstrations of heavy machinery, drones, and more. Numerous expert seminars and product presentations are held as well, providing opportunities to learn about the industry’s latest case studies and problem-solving hints. For engineers interested in themes like site efficiency, labor reduction, and improved accuracy, this is an event not to be missed.

LRTK Booth Highlights: High-Precision Positioning × AR Construction Support

At this Construction and Surveying Productivity Improvement Expo, LRTK is attracting attention in the fields of positioning technology and AR (augmented reality) construction support. LRTK is a pocket-sized high-precision GNSS positioning device that attaches to a smartphone and strongly promotes digital transformation at job sites. At the booth, LRTK’s combination of centimeter-level positioning accuracy and AR technology will be demonstrated and explained to show how it can transform fieldwork. Positioned in the categories of surveying equipment and cloud construction management tools, the booth is a place to experience the next generation of construction DX through “high-precision positioning × AR construction support.”

Visitors to the LRTK booth can experience a solution that handles precise surveying, 3D scanning, and AR navigation using just a smartphone. Many will be surprised to see “just how practical AR becomes when positioning accuracy improves!” and will appreciate the potential of surveying tools anyone can use easily. Below, we explain LRTK’s specific technologies and exhibit content in order.

Centimeter-Level Positioning Achieved with a Smartphone

LRTK’s biggest feature is that it turns a smartphone into a centimeter-level GNSS positioning terminal. Simply attach the dedicated ultra-compact RTK-GNSS receiver to a smartphone or tablet, and a smartphone GPS that normally has several meters of error instantly improves to on the order of centimeters. No complicated wiring or bulky tripods are required; the convenience of pulling it from your pocket and immediately starting high-precision positioning greatly increases mobility on site.

This high-precision positioning is made possible by support for augmentation signals (CLAS) from Japan’s Quasi-Zenith Satellite System “Michibiki” and real-time correction technology RTK. As a result, stable precise positioning is possible even in mountainous areas or work sites outside of communication zones. In the booth demo, you can see a smartphone with LRTK attached perform one-touch measurement of control point coordinates. Simply point the device at the point to be measured and press the button in the app; latitude, longitude, and elevation are recorded instantly—an experience that may be striking for those familiar with conventional surveying instruments. Satellite reception status and accuracy indicators during positioning can also be checked on the screen, providing visual assurance that centimeter-level precision is being achieved stably.

Construction Support via AR Navigation

Another innovative feature LRTK offers is AR navigation that leverages highly accurate location information. Through the smartphone screen, design drawings and construction models are overlaid on the real-world view to navigate workers to designated positions. For example, in pile driving or layout tasks for installing structures, arrows and guides on the smartphone screen lead the user to preconfigured coordinates, enabling even less experienced staff to accurately identify the correct locations. Tasks that once relied on veteran surveyors—such as layout marking (marking)—can be carried out by the team itself with LRTK.

The booth will feature demonstrations of construction support using this AR navigation function. Through a tablet screen, virtual structures are projected to scale on the job site so visitors can instantly see “place it here” positions. Thanks to centimeter-level positioning accuracy, AR-displayed models do not shift and align perfectly with real terrain and structures. This reduces alignment work and re-measurement and helps prevent rework caused by discrepancies between drawings and the field. Visitors are encouraged to pick up a device and experience AR guidance for future-oriented construction management.

Easy 3D Point Cloud Scanning with a Smartphone

With LRTK, you can also capture 3D point cloud data of a site on the spot using a smartphone. By combining high-precision location information with the smartphone’s built-in camera (and LiDAR sensors on supported models), detailed point clouds of surrounding structures and terrain can be generated simply by walking and capturing images. Traditionally, 3D point cloud measurement required expensive laser scanners or specialized contractors, but with LRTK a single worker can easily perform the task using one smartphone.

The demo shows point cloud scanning of booth mockups and site photos. As you slowly move the smartphone around, colorful clusters of points are rendered in real time on the screen and the object’s shape emerges in three dimensions. Captured point cloud data is previewed instantly, and you can measure dimensions or calculate area and volume on the spot. For example, you can quickly calculate earthwork volumes at an excavation site or overlay as-built data with the design model to verify the finished condition.

Also noteworthy are unique use cases combining point cloud data and AR. According to booth staff, it is possible to scan objects such as buried pipes during installation and then, after backfilling, view them from the surface through the smartphone in AR. In fact, on one site, pipes recorded underground with LRTK were later accurately located via AR display. This reduces the risk of damaging buried utilities during future excavations and dramatically improves traceability of construction records. The latest features combining point cloud scanning and AR hold great potential for future infrastructure management and maintenance, and they are already attracting many questions at the booth.

Intuitive Operability That Supports Single-Person Work

LRTK’s concept is “anyone, anytime, anywhere can measure.” The developer’s goal is for each field engineer to carry their own surveying device and be able to use it whenever needed. When you actually handle it, you may be surprised by its intuitive operability. The dedicated app’s interface is simple and easy to understand, allowing users to go from starting positioning to saving data without confusion. Those familiar with smartphones will be able to use it with almost no manual.

At the booth, interested visitors can handle LRTK and operate it themselves. Watching first-time users perform surveying and AR projection with just a brief explanation from staff will demonstrate the product’s ease of learning. The long-standing image that “surveying is for specialists” is significantly lowered by LRTK. This expands the scope of solo work and enables smooth surveying and as-built verification even at sites suffering from labor shortages. Even veteran technicians who feel uneasy about operating machines or software will be convinced of its ease of use after trying it once.

Centralized Data Sharing with Cloud Construction Management

The value LRTK creates is not limited to the moment data is collected on site. Measured coordinates, point clouds, and high-precision photos can be uploaded to the cloud on the spot and shared within the company in real time. Using the dedicated cloud service “LRTK Cloud,” a single tap from a site smartphone sends data so office staff can access it immediately. The booth’s display shows how measured points are automatically plotted on a web map and listed with point names, timestamps, and notes.

This cloud linkage realizes construction management that keeps the field and the office constantly connected. For example, if point cloud data collected on site is shared immediately to the cloud, office staff can start volume calculations and drawing preparation right away. Whereas previously detailed checks had to wait until data was brought back on SD cards or USB drives, with LRTK back-office tasks can begin while still on site. Uploaded data is stored in the cloud, so past construction records and surveying histories can be easily searched and viewed. If you need to recheck the location of a cable laid at site XX, you can log into the cloud and instantly retrieve the relevant point cloud or coordinate data. No more rifling through paper field notebooks or photo albums.

With security and access rights managed while sharing information with the necessary people, supervisors and field workers can communicate based on centralized data. Improved traceability not only helps with accountability but also streamlines report preparation and inspection responses, allowing you to fully appreciate the advantages of cloud-based construction management.

Expected Benefits of Adoption

The combination of high-precision positioning × AR construction support provided by LRTK offers substantial benefits for job sites. Feedback and questions from visitors to the booth suggest the following expected advantages.

• Labor reduction (fewer personnel required): Because surveying and layout can be completed by one person, tasks that used to require two-person teams can be done solo. This reduces staffing burdens and helps alleviate labor shortages.

• Error reduction and quality improvement: Centimeter-level positioning accuracy and AR visualization drastically reduce human error and mis-measurement. Ensuring construction is carried out as designed reduces rework and stabilizes quality.

• Improved work speed: Eliminating delays such as waiting for heavy machinery or surveying teams enables measurements and checks to be done whenever needed. Faster on-site decision-making contributes to overall schedule reductions.

• Improved traceability: Survey and construction records are automatically saved to the cloud, making it clear later who did what, when, and where. Worries about lost documents or missing records are eliminated, and report and inspection material preparation becomes smoother.

These effects ultimately lead to dramatic improvements in site productivity and safety. On sites that have introduced LRTK, reports include “surveying is finished quickly and overtime has been reduced” and “the reliability of record data improved, making reporting to clients easier.” At the LRTK booth, be sure to ask staff for concrete case studies about these adoption benefits. Hearing firsthand accounts will help you better visualize how LRTK could fit into your own operations.

For Those Who Can’t Attend the Expo: Learn More About LRTK

This article focused on LRTK’s exhibit content at the Construction and Surveying Productivity Improvement Expo and introduced its features and appeal. While experiencing the actual device at the venue is best, some people may be unable to attend due to distance or scheduling conflicts. Rest assured: you can learn about LRTK’s basic surveying functions and usage online.

Our [LRTK official site](https://www.lrtk.lefixea.com/) offers product information, case study articles, demo videos, and more. Through video you can get a sense of how easy surveying and point cloud generation are with a smartphone. The site’s inquiry form accepts demo requests and technical consultations. If you want to “try it on site” or “hear a concrete implementation plan,” please feel free to contact us. Our specialists will provide careful guidance via online meetings and other means.

The challenge of construction site DX cannot wait, but the arrival of powerful, easy-to-use tools like LRTK is lowering the barrier to taking the first step. Use insights gained at the expo or information available online to introduce new positioning and construction support technologies to your site. We hope LRTK can help you take the first step toward transforming the future of your field.