Table of Contents

• Introduction

• What Is a 3D Point Cloud?

• Benefits of Sharing Point Cloud Data in the Cloud

• Advantages of “Visualization” That Resonates with Clients

• Improving Construction Transparency Through 3D Point Cloud Sharing

• Simple Surveying with LRTK

• FAQ

Introduction

In construction projects, the fact that clients (project owners) often cannot easily see the site situation can be a major source of anxiety. Common concerns among clients include questions like “Is the construction progressing according to plan?”, “I don’t really understand the site situation, and the technical terms make it hard to ask questions,” and “I’m worried the finished work might differ from what was discussed.” The invisibility of the construction process can be a bigger worry for clients than even quality or cost.

Behind these anxieties is the traditional reliance on phone calls and paper documents for site information sharing, which tends to make progress a black box for clients. Lack of transparency and communication errors easily occur, and disputes over “who said what” sometimes escalate into conflicts.

The key to solving these problems is on-site information “visualization.” By clearly showing progress and work quality to anyone, you can eliminate client anxiety and build trust. In recent years, DX (digital transformation) has been promoted in the construction industry—led by initiatives like *i-Construction* from the Ministry of Land, Infrastructure, Transport and Tourism—and moves to boost transparency and productivity through cloud and 3D technologies in “site management DX” are accelerating. In particular, initiatives that convert entire sites into 3D data and share them provide intuitive “visualization” for clients, delivering overwhelming reassurance and satisfaction. This article focuses on the core concept of sharing 3D point cloud data in the cloud, explaining the mechanisms and benefits.

What Is a 3D Point Cloud?

A 3D point cloud (point cloud) is data that reproduces the real-world shape by a multitude of points that make up an object or space. Each point contains X, Y, and Z coordinates (and sometimes color or other information), and if points are captured at high density, the object can be depicted in photo-like detail. For example, when a building or terrain is converted to a point cloud, every bump and crease on the surface is recorded as points, yielding a 3D model that effectively captures the entire site on a computer. Because it digitally preserves the actual on-site “as-is” condition at the time of capture, it is often called a “digital twin” of the site.

There are several methods for acquiring point cloud data. These include using high-precision stationary 3D laser scanners to measure with millimeter-level accuracy (mm-level accuracy, 0.04 in), using drones to generate point clouds via aerial photogrammetry, and the increasingly common method of casually scanning with smartphone-integrated LiDAR sensors. While devices and accuracy differ among these methods, their shared advantage is the ability to measure wide areas in a short time. Terrain surveys that once took many days by manual work can now capture the entire site’s 3D point cloud data in a short time with drones or mobile devices. They are also excellent for safety because non-contact measurement is possible in hazardous areas where people cannot enter. Advances in 3D point cloud measurement technologies are making it increasingly easy for anyone to digitize a site.

Benefits of Sharing Point Cloud Data in the Cloud

So what are the benefits of sharing the acquired point cloud data in the cloud? The biggest advantage is that you can easily view and share very large 3D datasets. Point cloud files can contain millions to hundreds of millions of points and are therefore very large in capacity, historically requiring specialized software or high-performance PCs to handle. But with cloud-based point cloud viewers, interactive 3D point clouds can be displayed via a web browser. No special software installation is required, and clients and stakeholders can easily check the site’s 3D data from their home or office via a browser.

With cloud sharing, the latest point cloud data can be referenced simultaneously by multiple stakeholders. If new surveys or scans of construction areas are done on site and uploaded, clients and head office staff can share the information almost in real time. There is no need to mail USB drives or download huge files; simply sharing a URL or login lets people view the same 3D data anywhere, anytime. Centralized data management prevents confusion over different versions or which file is the “latest.” From a security standpoint, you can restrict viewing permissions or password-protect data, allowing important construction data to be handled safely.

For example, if the site is scanned with a smartphone after work and uploaded to the cloud that same day, the client can check progress from home that evening. Fine workmanship details that paper reports or photos could not convey become apparent in 3D, shortening reporting and approval times. By leveraging cloud and point cloud data like this, the efficiency of reporting, contact, and consultation is dramatically improved.

There are also services that overlay design drawings or BIM models with point clouds in the cloud, allowing visual checks of discrepancies between the as-built point cloud and planned data. Having 3D site data in the cloud makes such advanced analyses readily accessible from a browser without specialized software.

Advantages of “Visualization” That Resonates with Clients

Cloud-shared 3D point cloud data brings a major transformation to communication with clients. The greatest benefit is that clients can intuitively understand the site without specialist knowledge. Work quality that was difficult to convey via oral explanations or 2D drawings becomes immediately graspable by viewing a 3D model.

For example, at the foundation stage, showing subterranean pipe layouts with point cloud data allows clients to verify what lies beneath the ground. Where prior explanations such as “there is a pipe buried here” were hard to visualize even with diagrams or photos, 3D lets clients immediately understand “Ah, it runs like this.”

Also, for clients who are far away and cannot visit the site frequently, the ability to check progress three-dimensionally in the cloud provides great reassurance. Clients can virtually tour the site from home using a PC or tablet and verify the pace and quality of the work with their own eyes. This alleviates worries like “Is the work really progressing?” and eliminates the need for frequent site visits.

Conducting online meetings while sharing 3D data allows participants to jointly inspect areas that are hard to imagine from drawings, making communication far smoother. In some cases, using AR (augmented reality) to overlay models on the site during explanations enables non-experts to intuitively grasp the completed image. Such visual information sharing reduces the need to simplify complex technical terms and is expected to increase client understanding and satisfaction.

Continuously sharing site conditions as 3D data also gives clients a sense of active involvement in the project. Being able to relive daily construction progress in 3D can make the home-building process feel like a “visible diary,” turning anxiety into anticipation.

Improving Construction Transparency Through 3D Point Cloud Sharing

Sharing 3D point cloud data dramatically increases project-wide transparency. By keeping site conditions openly shared at all times, an open relationship with no concealment can be built between clients and contractors. Historically, sites were black boxes and clients could only understand the situation through final inspections or fragmentary reports. But if point cloud data are accumulated and published, the entire construction process is recorded. For example, saving point clouds taken before and after rebar or equipment installation allows later verification—by third parties if necessary—of whether the work was performed according to the drawings. In other words, objective verification based on data becomes possible, preventing “he said/she said” disputes and helping to avoid problems before they arise.

Increased transparency not only boosts client trust but also benefits contractors. Sharing information with clients continuously creates a healthy level of accountability on site and encourages higher construction quality. If clients can raise questions or point out issues early, rework is reduced, lowering the risk of cost increases and schedule delays.

When the entire project proceeds by sharing a single 3D dataset, a unified cooperative structure can be built. By sharing 3D information across site and office, clients and contractors overcome positional divides and enable smooth decision-making with everyone focused on the same goal. The transparency and visualization of construction processes give clients peace of mind and confidence, and contractors can achieve smooth project management backed by trust.

Furthermore, providing clients with 3D point cloud data at handover lets them use the detailed as-built data for future renovations or maintenance. Even without the original drawings, accurate dimensions can be derived from point clouds, making the data a valuable long-term information asset. Ensuring transparency thus contributes to improved client services over the long term.

Simple Surveying with LRTK

A foundation for cloud-based 3D point cloud sharing is speedy on-site 3D measurement. The recently introduced LRTK (LRTK) has attracted attention as a solution that enables anyone to perform high-precision surveying and point cloud scanning easily. LRTK consists of a compact RTK-GNSS receiver that attaches to a smartphone and a dedicated app, turning a single smartphone into a high-precision 3D scanner. Using real-time satellite positioning (RTK technology), a smartphone can achieve centimeter-level position accuracy (cm level accuracy, half-inch accuracy), and by simultaneously scanning the surroundings with the phone’s built-in LiDAR or camera, the site can be captured as 3D point cloud data with absolute coordinates. The major strength is that high-precision point cloud measurements can be performed simply by walking around the site and holding up a smartphone, without special equipment or expert surveying skills.

Acquired point clouds and positioning data can be synced to LRTK’s cloud service with a single tap, allowing office PCs to immediately check the site. There’s no need to import into software; point clouds can be viewed, measured, and shared directly in the cloud, enabling speedy reporting from the field to clients.

LRTK is also useful as a daily simple surveying tool, not just for detailed point cloud scans. Tasks that previously required a transit or level—such as setting control points, measuring elevation differences, or confirming distances between two points—can be handled on the spot with only a smartphone fitted with LRTK. In situations like “I want the coordinates of this point,” “I want to mark a position specified on a drawing on-site,” or “I need to quickly measure the distance between two distant points,” LRTK allows on-site staff to respond quickly without waiting for specialized surveyors.

Usage is simple: follow the app’s instructions and tap a button at the point you want to measure. Even beginners can obtain high-precision position coordinates and distance measurements without confusion. If an urgent survey is required, having just a smartphone allows immediate response, greatly improving field responsiveness and flexibility.

By turning a smartphone into a versatile surveying instrument with LRTK, the barriers to point cloud utilization are significantly lowered. Without purchasing expensive equipment or outsourcing to surveyors, in-house staff can collect and instantly share necessary data. A phased introduction—“start with simple surveys, and once accustomed, try full-scale point cloud scanning”—is also possible. This enables even small sites to adopt the latest technologies comfortably, ultimately improving client services and internal efficiency. Experience easy, smart surveying and point cloud data sharing by leveraging LRTK.

FAQ

Q: What is point cloud data? A: Point cloud data are 3D data that represent real space by a collection of many points. Each point contains positional coordinates (and sometimes color or other information), and the ensemble of points can record the shapes of terrain and structures in detail. Point clouds are obtained by laser scanners, photogrammetry, or smartphone LiDAR scans, and they allow the site situation to be digitally preserved as a “copy.”

Q: Do clients need special software to view point cloud data? A: Special software is not always required. Using a cloud-based point cloud viewer, 3D point clouds can be viewed via a web browser. For example, if a contractor uploads point cloud data to the cloud, the client can log in from a home PC and freely rotate and zoom the model in the browser. No special software installation or high-end PC is necessary—only an internet connection.

Q: Point cloud data are large—can they be shared? A: Yes. Cloud services allow efficient sharing of large point cloud datasets. Where email attachments were once impractical due to size, uploading to the cloud lets stakeholders view the data via streaming. Because the viewer loads only needed portions sequentially, users don’t have to download huge files to get smooth 3D visualization. Access can be restricted with permission controls, enabling safe and reliable use of confidential data.

Q: Can I adopt 3D point clouds without expensive equipment or specialist knowledge? A: Yes. Affordable and easy-to-use technologies have appeared in recent years. One example is LRTK, a smartphone-based point cloud measurement tool. Combining a smartphone with a compact GNSS receiver allows anyone to survey with centimeter-level accuracy and obtain point cloud data. Without costly laser scanners or specialized surveying skills, in-house staff can begin using 3D point clouds. Start small and expand gradually to advance site DX without strain.

Q: At what stages of construction is it effective to perform point cloud measurement and sharing? A: It depends on the project’s scale and type, but generally it’s effective to measure at key construction milestones. Examples include after foundation work, immediately after installing usually hidden elements such as piping or rebar, at the framework completion, and before handover at completion. Sharing the as-built 3D data in the cloud at each milestone lets clients monitor important stages and resolve concerns early. If regular scans are difficult, at minimum capture areas that will be concealed later—such as before backfilling buried items or before and after concrete pouring—so that records remain (and serve as post-completion quality documentation).

Q: Can clients who are not tech-savvy use cloud 3D point cloud sharing? A: Yes, the operations are not particularly difficult. Cloud point cloud viewers rely on intuitive actions like dragging the screen and zooming, allowing users to look around the site almost like a game. For elderly clients or those unfamiliar with IT, it helps if the contractor preconfigures viewpoints or cross-sections to present. If needed, contractors can assist with tablet operation during explanations, so clients don’t have to operate a PC themselves. Above all, because the 3D data are actual captures of the site, they are easy to understand intuitively even without technical knowledge.

Q: Is cloud 3D point cloud sharing effective even for small-scale renovation work? A: Absolutely. Even in small projects, the reassurance clients gain from seeing the site situation is valuable. For example, when reinforcing wall structures during a home remodel, scanning before and after and showing the data allows clients to verify normally hidden work. What used to be feasible only in large-scale projects is now accessible through smartphones, so small projects can actively use point cloud sharing to enhance trust. Transparent initiatives directly improve client satisfaction and help build trusted relationships.