Real-time On-site Data Sharing for Civil Construction Managers: Using LRTK to Leverage the Cloud

Civil construction managers are specialists who oversee construction site operations and handle a wide range of management tasks including quality, safety, and scheduling. Vast amounts of information are generated on-site every day: survey results, records of construction progress, as-built verification data, and construction photos. However, if the methods for managing and sharing that information remain traditional, necessary data may not be readily available, leading to reduced work efficiency and communication errors. This article organizes the roles required of civil construction managers and the challenges of on-site data management, and explains how to share on-site data in real time using the latest cloud-enabled solution, LRTK, and the effects of doing so.

Roles required of civil construction managers and an overview of on-site data management challenges

The role of a civil construction manager is not merely to supervise on-site work but to accurately grasp all information related to the project and share it among stakeholders. For example, terrain data and reference point coordinates obtained by surveying, daily progress, as-built measurement results (post-construction shapes and dimensions), and photographic records during construction are all essential data for quality control, schedule management, and reporting to clients and regulatory authorities.

In reality, however, such on-site data are often managed in a fragmented way: paper documents, Excel files, and data stored in individual measurement devices. Survey teams bring coordinate data obtained with dedicated instruments back on USB drives and save them to office PCs; construction managers write progress in paper logs; as-built management is organized in separate spreadsheets; photos are taken with digital cameras or smartphones and later pasted into ledgers—because data are dispersed, when you want to present “the latest site status” in a progress meeting or inspection preparation, it can take a long time to gather and integrate information from various sources.

Moreover, if information is not shared in real time, there is a time lag before headquarters or other teams can be asked for support when problems occur on site. For example, if a discrepancy with the design drawings is found during construction, the latest survey data and photos must be shared immediately to plan corrective measures on the spot, but with conventional methods the responsible person often has to return to the office to compile the materials before reporting, making rapid response difficult.

Thus, while civil construction managers are expected to have advanced on-site responsiveness, outdated information management methods can prevent them from fully exercising their capabilities. So what should be changed in on-site data management? The key is building a system that consolidates diverse on-site data—surveying, progress, as-built, photos, AR—and enables real-time sharing.

The necessity of unifying diverse on-site data such as surveys, progress, as-built, photos, and AR

The variety of data handled at civil construction sites is increasing year by year. Where information used to be limited to paper drawings and quantity tables, it now includes digitized survey data, schedule logs and progress records, 3D as-built measurement data, construction record photos, and even design-model projection using AR (augmented reality). Managing each type of data separately—each with different formats and storage locations—makes cross-referencing and integrated analysis difficult. For example, comparing as-built measurement results with design drawings or visualizing progress on a map often requires opening separate files and manually matching them.

Centralized data management can eliminate these inefficiencies. If all site data are aggregated in a single cloud system, they can be linked using location and time information as keys. Specifically, coordinate points obtained by surveying, photos taken at those points, and the design 3D model of the construction object can be overlaid and checked on the same platform. If progress data are also managed in conjunction with geographic information, it becomes intuitive to see which parts of the site are at what completion level at which dates and times. In short, an environment that enables cross-utilization of various data types is established.

Also, centralized data are constantly updated to the latest information, enabling all stakeholders to share “what is happening on-site right now.” This reduces discrepancies in understanding among the site, headquarters, and subcontractors, allowing for accurate instructions and judgments. For civil construction managers, unifying on-site data is not merely an improvement in data management efficiency but the foundation that supports smooth communication and decision-making across the entire project.

High-accuracy on-site data acquisition with LRTK and real-time sharing via smartphone and cloud

A concrete solution to achieve such data unification and real-time sharing is LRTK. LRTK is a positioning and measurement system that combines a smartphone with a compact high-precision GNSS receiver, designed so that a single person can easily acquire various types of data needed at civil sites and share them to the cloud immediately. It enables cm-class precision surveying and 3D scanning—which traditionally required specialized equipment and skills—using only a pocket-sized device and a smartphone app.

With LRTK, the on-site data acquisition and sharing flow changes as follows:

• High-precision positioning and measurement: Construction managers use the LRTK app on a smartphone to conduct surveying and measurements on-site. The RTK method allows position coordinates to be obtained immediately with errors reduced to a few centimeters (a few inches). The smartphone’s built-in LiDAR sensor and camera can be used for 3D scanning to record terrain and structures as point cloud data. When construction photos are taken as needed, high-precision capture position (latitude, longitude, elevation) and orientation information are automatically attached to the photos.

• Automatic cloud sharing of data: Survey point data, point cloud data, photos, and other data acquired on-site are automatically synced to the cloud from the LRTK app on the spot. There is no need to return to the office and transfer data via USB. Data sent from the smartphone are uploaded to the cloud within a few seconds to a few tens of seconds and stored in the project-specific database.

• Real-time viewing and utilization by stakeholders: Data synchronized to the cloud can be viewed by stakeholders immediately via the Internet. headquarters staff or subcontractor engineers who are not on site can access the LRTK cloud system from their PC or tablet web browsers to display survey points and tracks on a map or inspect uploaded point clouds in a 3D viewer. No special software installation is required, and distance, area, and volume measurements can be performed in the browser. In other words, raw data collected on-site can be shared and effectively used by everyone on the same platform instantly.

In this way, LRTK seamlessly links data transmission between the site and the office using the power of smartphones and the cloud. With high-precision data circulating in real time, the previously separate tasks of “measuring/recording” and “sharing/reporting” are integrated, dramatically increasing the speed and accuracy of site management. LRTK also includes AR functionality, allowing design 3D models to be overlaid on the real site view without misalignment by leveraging the high-precision coordinates obtained. This enables intuitive on-site verification of designs that used to be done with paper drawings or visual estimation.

Operational improvements from cloud use: remote support, automated daily reports, faster inspections, etc.

Sharing on-site data via the cloud through LRTK brings various operational improvements to construction management. The main benefits are as follows:

• Remote support becomes possible: Because the site situation can be grasped instantly on the cloud, precise remote support from headquarters or design staff becomes easier. For example, if unexpected ground conditions are encountered on-site, headquarters engineers can immediately check the surveyed terrain data and photos taken on the spot. Sharing the current status from afar while giving advice or instructions significantly speeds up problem resolution. It also becomes easier for experienced engineers to remotely monitor multiple sites and support the decisions of younger staff.

• Automation and labor savings in daily report creation: Because data acquired on-site are stored as-is, daily reporting is simplified. LRTK allows photos to be recorded with titles and notes and includes a function to automatically layout multiple photos and comments into a PDF. Using this feature, construction daily reports and as-built reports that were formerly created by pasting photos on a PC can be generated with a single click, substantially reducing time spent on clerical work. Site supervisors are freed from tedious paperwork and can spend more time on safety management and quality checks.

• Faster inspections and witness work: Preparation and verification tasks required for completion inspections and owner witness inspections are also streamlined. By using as-built data (measurement results of heights, thicknesses, slopes, etc.) and point cloud models stored on the cloud, drawings and quantity calculation sheets for submission can be prepared quickly. For example, volumes of embankments or as-built dimensions calculated on the LRTK cloud can be directly reused in reports, reducing the need to re-measure on-site. Inspectors can also review 3D data on the cloud in advance, helping field inspections proceed smoothly. As a result, lead times to inspection approval are shortened, providing more margin in the handover schedule.

• Smoother information sharing and fewer errors: Real-time sharing reduces communication errors like “I said/I didn’t hear,” and discussions based on the latest data prevent rework due to misunderstandings. With all data gathered in the cloud, human errors such as misfiling or loss of documents are also reduced. In addition, accumulated data become easier to analyze, facilitating knowledge sharing such as referencing past data when planning similar projects.

Thus, cloud usage brings efficiency and sophistication across the operational processes of civil construction managers and improves the quality of site operations.

Low barriers to adoption and how to integrate into existing workflows

When introducing new digital tools to the field, concerns like “Is it expensive?”, “Can we use it effectively?”, and “Will it require major changes to our current methods?” are common. However, with LRTK such adoption barriers are relatively low.

First, the required equipment is only a smartphone and a palm-sized GNSS receiver; large conventional surveying instruments and dedicated servers are not necessary. Its portability minimizes carrying and setup effort on site. The convenience of carrying a device weighing only a few hundred grams in a pocket and taking measurements quickly when needed is a strength not found in previous instruments.

Next, operations are designed to be intuitive on a smartphone app. Those accustomed to smartphones can record survey points, take photos, and start/stop point cloud scans with the same ease as using a map app. Even without specialized knowledge, site staff can begin using it after a short briefing. The UI is especially familiar to younger engineers, allowing organizations to leverage digitally minded personnel’s skills.

Moreover, LRTK is designed to fit into existing workflows. Survey and point cloud data obtained are compatible with the Ministry of Land, Infrastructure, Transport and Tourism’s coordinate systems (such as plane rectangular coordinates and the World Geodetic System), so consistency with conventional drawing coordinates can be maintained. For example, there is a function to convert to the local coordinate systems used on-site, so coordinates obtained with LRTK can be imported directly into design drawings and other CAD software. Output formats such as CSV, DXF, and PDF are supported, making it easy to transfer or reuse data for submissions to authorities and internal reports.

From an operational standpoint, it is not necessary to digitize everything at once. You can start by trying LRTK for photo management and gradually expand to sharing survey and point cloud data. The cloud’s usage can be adjusted according to project scale and team skill levels, providing flexibility. Because digitalization can proceed at a manageable pace according to site conditions, the risk of “being unable to use it and abandoning it” is reduced.

Overall, LRTK strongly supports on-site DX (digital transformation) for civil construction managers while keeping adoption and operation barriers low.

Field deployment of LRTK and expectations for adoption

LRTK’s effectiveness in field operations is increasingly being confirmed. For example, one municipality deployed LRTK in disaster recovery work to quickly 3D-scan terrain and share it on the cloud, enabling headquarters staff to understand site conditions and plan emergency measures without being on-site. In private construction sites, LRTK has been used to overlay design models and as-built conditions with AR in slope works to confirm finishes, to identify buried pipes by exploratory digging and convert them to 3D point clouds so that hidden pipes can be accurately avoided during later excavation using AR displays, and to measure as-built conditions before final road inspections to identify areas needing touch-up and thereby improve quality.

LRTK’s field implementation is steadily expanding and its effects are becoming clear. As a civil construction manager, to increase productivity and safety on-site while reducing your own burden, it is important not to rely solely on traditional experience and intuition but to proactively adopt such advanced tools. In line with the Ministry of Land, Infrastructure, Transport and Tourism’s promotion of *i-Construction* and the construction DX movement, establishing a foundation for real-time data sharing and utilization will be a key competitive advantage in future site management.

Finally, reconsider the benefits you can gain by considering LRTK adoption. Reducing time spent on surveying and record-keeping and making quick decisions based on accurate data—those incremental improvements lead to smoother projects and better quality. Record what is happening on-site now, share it immediately, and connect it to the next action. To realize such an ideal cycle, please consider actively adopting LRTK.