Sharing Records to the Cloud with Railway DX: Connecting Field and Office with LRTK Cloud

As the railway industry faces labor shortages and aging infrastructure, the importance of field DX (digital transformation) is increasing. This article explains how the recording and sharing solution "LRTK Cloud," which leverages smartphones, RTK technology, and the cloud, streamlines field recording tasks and seamlessly connects the field and the office. It details the challenges of traditional handwritten records, improvements enabled by the latest digital technologies, and the concrete benefits gained from implementation. You will get a glimpse of the future of railway maintenance through field DX. First, let’s look at the overall picture and background of railway DX.

Overview and Background of Railway DX

In recent years, the wave of DX (digital transformation) has reached the railway industry as well. DX refers to initiatives that fundamentally transform business processes by utilizing digital technologies such as AI, IoT, and cloud services. Especially in railway infrastructure maintenance and construction sites, the industry faces challenges such as labor shortages, aging facilities, and the concentration of information and know-how in individuals, making the promotion of DX an urgent task.

• Chronic labor shortages: Due to low birthrates, population aging, and young people leaving the industry, it has become difficult to secure technicians involved in railway maintenance. As veteran generations reach retirement and leave the field, fewer new entrants are joining, and future technician shortages are becoming serious.

• Aging facilities: Railway facilities and equipment developed during the high-growth period have been aging over decades since construction. As critical infrastructure like bridges and tunnels age, the demand for inspection and repair is increasing. With the same old methods, it is becoming difficult to handle massive maintenance work within limited time windows (such as nighttime work after the last train). In fact, it is predicted that by the 2030s about 80% of railway bridges nationwide will be assets over 50 years since construction, and maintenance demand is expected to further increase.

• Information concentration in individuals: On railway maintenance sites, experienced technicians’ experience and know-how tend to accumulate in individuals. As a result, work procedures and decision-making depend on specific veterans, and technical training for newcomers does not proceed smoothly. Relying on paper records and oral communication makes it difficult to share knowledge across the organization, risking the loss of important knowledge when veterans retire.

Against this backdrop, the railway industry strongly needs to adopt digital technologies in field operations—“railway DX.” Government-led DX promotion in the infrastructure sector, such as MLIT’s “i-Construction,” also supports this trend, and railway companies are moving to reform operations through digitalization to sustain safe and efficient operations. Indeed, major railway companies are accelerating DX-related investments such as AI-based anomaly detection and inspection robots, and railway DX is becoming an industry-wide trend. Overseas railways are also advancing DX initiatives like drone and IoT sensor-based inspections and AI-driven predictive maintenance. Japanese railways must not lag behind this global trend and need to enhance maintenance and management through field DX.

The Burden and Inefficiency of Traditional Recording and Reporting

On railway maintenance sites, recording and reporting have traditionally relied on analog methods. For example, inspection work involved filling in handwritten inspection sheets, and photos taken with digital cameras or smartphones were managed separately at each site. Workers would note the position and direction of photos by hand on paper drawings and, upon returning to the office, organize those photos and paste them into reports—tasks that required considerable effort. Especially for track inspections conducted within short nighttime windows, it was common that records could not be fully completed on site and had to rely on later report creation.

With these traditional methods, photos and drawings tended to be managed separately, and field-collected data often scattered across multiple places such as paper notebooks, Excel files, and images in cameras. This made it hard to know which information was the latest, and introduced risks of recording errors or data loss. Sharing field information with other internal teams or contractors also relied on inefficient means like attaching files to emails or handing over USB memory sticks. Naturally, such methods introduced time lags that hindered quick information sharing and decision-making.

As a result, report preparation required long hours after fieldwork, imposing a burden on staff. Person-dependent management made it difficult for valuable field knowledge to accumulate within the organization and contributed little to future technical succession. To resolve these inefficiencies, reform of recording and reporting processes through digital technology was needed.

Features of LRTK Recording Realized by Smartphone + RTK + Cloud

A key solution to these issues is a new recording method combining smartphone + RTK + cloud. By linking a small RTK-GNSS receiver attached to a smartphone, a dedicated app, and cloud services, information collected in the field can be recorded digitally with high accuracy and shared immediately. For example, using the smartphone-mounted high-precision positioning device LRTK Phone and the LRTK dedicated app, you can obtain centimeter-level (cm-level accuracy; half-inch accuracy) positioning and point cloud data, then save and share them on the cloud platform LRTK Cloud. Here are the main features this LRTK system brings.

• Immediate recording and sharing on site: Coordinate data and photos measured can be recorded directly on the smartphone. If network connectivity is available, data can be uploaded to the cloud immediately after measurement, enabling additional measurements and data verification in real time on site. This eliminates the need to transcribe onto paper or perform data entry after returning to the office, preventing recording errors and greatly improving immediacy. The app can display current position and measured points over a map background, making it easy to visually grasp results on site and smoothly decide where additional measurements are needed.

• Centimeter-level high-precision positioning: By utilizing RTK (Real Time Kinematic) technology, GNSS positioning errors are corrected in real time to determine positions with centimeter-level accuracy (cm-level accuracy; half-inch accuracy). Standalone smartphone GPS had errors of several tens of centimeters, but with RTK corrections, the precise measurements required for railway maintenance become possible. You can confidently collect data for inspections where positional accuracy is required, such as track geometry and catenary poles. In Japan, RTK positioning can be achieved without installing a base station on site by using correction services from networks of electronic reference points and the Quasi-Zenith Satellite System (Michibiki). The establishment of such technical infrastructure has created an environment where smartphone RTK can be easily utilized.

• Geotagging of photos and point cloud data: Photos taken with a smartphone and 3D point cloud scans obtained by LiDAR, etc., are automatically assigned high-precision coordinate information. Therefore, on the cloud you can display photos and point clouds on maps or drawings and immediately understand “which location the record belongs to.” The tedious task of matching photo numbers to drawings after shooting is no longer necessary. Linking photos with positioning data prevents omissions in records and enables three-dimensional recording and sharing of site conditions.

Also, the smartphone + RTK approach is notable for being lower cost to start with than introducing a full set of dedicated surveying equipment. By using existing smartphones and adding a small device, you can promote DX while keeping the budget down.

Centralized Management of Drawings and Records in the Cloud, Easy History Sharing and Internal/External Collaboration

Field data obtained via smartphone + RTK are centrally managed by uploading them to the cloud. All information—coordinate data, photos, point clouds—are stored on the cloud and visually organized on maps and drawings. The cloud interface plots measured points and photo locations, allowing you to check coordinate values, elevations, and notes for each point. Photos can be listed and previewed with location information, so it is intuitive to see “which photo was taken at which point.” By linking field data and drawings on a single platform, you can always get an overview of the latest site conditions.

Because the data are on the cloud, sharing with internal and external parties is also significantly easier. Internal stakeholders can access LRTK Cloud from a web browser without installing dedicated software and instantly view the latest field data. There is no need to wait for USB handoffs or email attachments—real-time information sharing between field and office becomes possible. If necessary, you can issue URL links to cloud-hosted data with password protection and expiration settings to share externally. Contractors or clients receiving the link can view data in a browser without logging in, allowing safe and speedy sharing of site information. This mechanism enables a remote-on-site (“remote presence”) work style where you can check site conditions from headquarters and give instructions or discuss matters remotely.

Also, because data are always stored in the cloud, there is no worry about losing records if a field device is lost or damaged. Automatic backup mechanisms allow swift data recovery in emergencies, ensuring secure information management.

As records accumulate in the cloud from past to present, history management and utilization are improved. You can search data by date and location and quickly retrieve past inspection results and construction histories, which helps analyze long-term changes and prevent recurrence of problems. For example, graphing the annual progression of track settlement from periodic measurement data is easy. Accumulated data can be used as training material for newcomer education and skills transfer; by turning veteran knowledge into a database, person-dependent information becomes an organizational asset. Cloud-based positioning data can be exported as CSV or point cloud files for easy import into CAD drawings or GIS software. In the future, functions are planned to overlay BIM/CIM models with field survey data, enabling seamless integration of drawings and field information. In this way, a cloud-centered information infrastructure becomes a powerful foundation supporting railway DX.

Concrete Work Improvement Scenarios after Implementation

Once LRTK Cloud is implemented, various improvements appear in workflows between field and office. Here are some of the main effects.

• Dramatic reduction in report preparation time: Because measured values and photos acquired on site are automatically organized and stored, the time required to prepare reports is dramatically reduced. Whereas reports used to be created from scratch by referring to paper notes and digital camera photos, now you can simply add necessary items based on cloud data. For example, preparation of inspection reports that previously took several hours can be significantly shortened, allowing staff to devote time to higher-value tasks.

• Labor savings and improved field work efficiency: Smartphone + RTK measurement enables efficient field surveying and recording by a single person. There is no need to transport heavy surveying equipment or measure distances in two-person teams, enabling data collection over wide areas with minimal personnel. Because the flow from measurement to cloud storage is completed as a single process, trips between field and office and rework are reduced. This allows limited personnel to accomplish greater workloads than before and helps maintain a stable maintenance system despite labor shortages.

• Support for skills transfer: Digital records serve as educational tools for less experienced technicians. Newcomers can view past inspection data and comments left by veterans on the cloud, efficiently learning site know-how. The smartphone app’s intuitive interface makes it easy for staff without specialized surveying training to participate in field recording. These factors help share previously person-dependent know-how across the organization and prevent breaks in technical succession during generational change.

• Improved data quality and safety: High-precision measurements and digital recording reduce human errors and mistaken entries. The reliability of measured values increases and directly improves report quality. Shorter work times also reduce time spent on the track, enhancing field worker safety. For example, there is no need to force work during short train service interruptions, allowing safer verification before work. Furthermore, accurate and consistent data reduce the need for rework (re-measurement or rework) later, achieving both safety and efficiency. Field feedback such as “It’s a huge help to reduce workload under the blazing sun” shows that this efficiency also reduces physical burden on workers.

In this way, implementing LRTK Cloud transforms the entire workflow of field recording and reporting, simultaneously saving time and personnel resources, supporting skills transfer, and ensuring safety and quality. For example, a railway operator’s maintenance division reported that after introducing LRTK Cloud, the time to prepare daily patrol inspection reports was reduced to less than half of the previous time, and information sharing between field and headquarters accelerated dramatically. In tunnel inspections, data uploaded from the field were reviewed by headquarters engineers the same day, allowing same-day decisions on whether repairs were necessary, contributing to faster decision-making. Secondary effects such as improved IT literacy among field staff and reduced resistance to digital technology have supported DX promotion, creating a virtuous cycle. Paperless records also yielded ancillary benefits such as reduced paper usage and saved storage space for files.

Points for Promoting Field DX

To establish new digital tools in the field, consider the following points.

• Education and sharing purpose with field staff: Provide sufficient explanation and training to field staff, sharing not only how to use the tools but also the purpose and benefits of digitalization. Offer hands-on demonstrations and training sessions to reduce resistance.

• Start small with trials: Instead of aiming for a perfect system from the start, first conduct pilot implementations in a limited section or team to measure effects, and expand gradually.

• Reflect field feedback: Even after deployment, collect feedback from the field and continuously revise operation rules and screen layouts so the system becomes well-suited to practical work.

• Promote organization-wide: It is essential to share the significance of DX promotion across the organization from management to the field and to have an attitude of linking data across departments.

Conclusion

Introducing a system that accurately records field data using smartphone-based simple surveying with RTK and shares it in real time via the cloud (LRTK Cloud) brings significant benefits to railway sites. By directly linking field and office with data, person-dependent information can be utilized across the organization, enabling high-quality maintenance management even with limited personnel. This serves as an effective measure against challenges such as labor shortages and aging facilities and contributes to the safe and stable operation of railway infrastructure. Furthermore, if the vast amount of field data accumulated in the cloud is used for AI analysis, further developments such as advanced deterioration prediction and preventive maintenance are expected. LRTK Cloud will play an increasingly important role as a data platform in the railway DX era. DX cannot be achieved overnight, but by incorporating such digital technologies into the field, steady transformation of daily operations can be achieved. Let us use LRTK Cloud to eliminate the gap between field and office and realize a new era of railway maintenance together. Now is the time to promote field DX and carve out a new future for railways. We have entered an era in which sustainable railway services cannot be discussed without field DX.