Cultural Heritage: What Can 3D Surveying Do? 6 Use Cases and Tips to Avoid Failure

In the field of cultural property preservation and utilization, there is growing demand not only to keep records but also to organize data with an eye toward future repairs, public display, research, and disaster response. In this context, three-dimensional surveying, which can record shape and positional relationships with high precision, has attracted attention. As a method that supplements information that conventional plans and photographs cannot fully convey and can preserve the current condition without diminishing the value of cultural properties, its adoption in practice is spreading.

On the other hand, many people in charge feel, "We have a vague idea of what can be done, but it seems likely to proceed with the purpose of implementation remaining unclear," "Even if we create point clouds or 3D models, we ultimately don't know how to make use of them," or "Cultural properties have different conditions for each subject, and using the same approach as ordinary surveying is likely to fail." Three-dimensional surveying of cultural properties is not a task that yields results simply by capturing data with equipment; it is important to design it to include preservation policy, intended uses, the scope of publication, and the management system.

In this article, aimed at practitioners gathering information on "cultural heritage 3D surveying", we outline what can be achieved with 3D surveying and introduce six practical on-site use cases. We also provide a detailed explanation of common pitfalls during implementation and mindsets to avoid failures, as well as the practical perspectives you should check when commissioning and operating.

Table of Contents

• Why Three-Dimensional Surveying Is Gaining Attention in Cultural Heritage

• What can be done with 3D surveying of cultural heritage

• 6 Examples of 3D Surveying Applications for Cultural Heritage

• Common Failures in 3D Surveying of Cultural Heritage

• How to proceed to avoid failure

• Operational perspectives for leveraging 3D surveying in cultural heritage practice

• Summary

Reasons Why Three-Dimensional Surveying Is Attracting Attention in Cultural Heritage

The increasing attention to three-dimensional surveying of cultural properties stems from the diversification of preservation targets and the rising standards required for documentation. Even within the category of cultural properties, the objects are wide-ranging—buildings, stone monuments, archaeological remains, Buddhist statues, gardens, burial mounds, castles, and settlement landscapes—and each presents different conservation challenges. Traditionally, current conditions have been recorded mainly through measured drawings, photographs, and written records, but these methods have limitations when it comes to comprehensively sharing complex shapes, subtle deformations, and the relationships of the entire space.

For example, tilt and deflection, surface damage, how members fit together, and height differences with surrounding terrain can be difficult to convey adequately with two-dimensional drawings alone. Photographs are visually intuitive, but they tend to depend on the photographer’s viewpoint and composition, making it hard to accurately interpret dimensions and positional relationships afterwards. In that regard, data obtained from three-dimensional surveying has the advantage of recording the object’s shape with coordinates, making it easy to check arbitrary cross-sections later or to remeasure distances and heights.

In the fields of cultural property administration and facility management, there is a strong demand not only to "preserve the current condition" but also that data "can be used to inform future repair decisions," "can foster a shared understanding among stakeholders," and "can lead to practical applications." The uses of recorded data are expanding, including consideration of repair plans, comparisons before and after disasters, preparation of materials for public release, exhibition design, educational use, and information outreach to visitors. Three-dimensional surveying is valued because it can be readily positioned as foundational data that supports both preservation and utilization.

Furthermore, the challenges of labor shortages and skill transfer cannot be ignored. While the investigation and management of cultural heritage require highly advanced judgment, they also tend to rely on individual experience. If three-dimensional data are maintained, it becomes easier to transfer the current state with a consistent level of accuracy even when staff are reassigned or contractors change. In terms of standardizing records and ease of sharing, three-dimensional surveying is a method of great practical value.

However, just because three-dimensional surveying is effective for cultural heritage does not mean the same method should be applied to every case. Cultural heritage often has many constraints—such as being difficult to touch, not allowing close access, hard to illuminate, difficult to erect scaffolding around, and requiring consideration for visitors and the surrounding environment—so you must consider not only accuracy but also non-contact requirements, working time, safety, and ease of data management. The important thing is not to make three-dimensional surveying an end in itself, but to clarify why you are measuring and then choose the appropriate method and deliverables.

What 3D Surveying Can Do for Cultural Heritage

What can be achieved with 3D surveying of cultural properties can be broadly organized into four categories: “high-precision recording of current conditions,” “visualization of relationships that are difficult to see,” “support for repair and conservation decision-making,” and “production of materials for public use.” Keeping these points in mind makes it easier to position 3D surveying not merely as an advanced recording method but as a means to solve operational challenges.

First and foremost is a high-precision record of the current condition. Because the object's shape, dimensions, position, elevation differences, inclination, and surface irregularities can be preserved as three-dimensional information, it becomes possible to carry out a range of checks and measurements without revisiting the site. Cultural properties inevitably undergo changes over time, and damage or deformation may progress. Recording the condition at the time of investigation with coordinates provides the basis for future comparison and restoration.

Next is the visualization of relationships that are hard to see. For example, relationships between structures and the ground, bulging of stone walls, undulations within gardens, overlaps of archaeological remains, and continuity with the surrounding topography can often be understood on site but become difficult to convey when translated into meeting materials or reports. By creating cross-sections, bird's-eye views, and views from arbitrary directions using three-dimensional survey data, these features become intuitively easier to understand even for non-specialists. This also has a significant effect on building consensus with repair committees and relevant agencies.

The third is decision support for repair and conservation. With three-dimensional data, it becomes easier to assess the amount of deformation, verify the arrangement of members, compare before-and-after construction, and identify hazardous locations. In cultural property restoration, decisions such as “how far to intervene” and “preserve as is, reinforce, or restore” are important, and three-dimensional surveying is effective as objective material to support those discussions. This is because information that tends to be ambiguous from visual inspection alone can be organized as shape data.

The fourth is creating materials for public use. Three-dimensional survey data itself is specialized, but it can be developed into videos, explanatory diagrams, viewable models, exhibition content, and so on. Even for locations where on-site access is difficult, or for cultural properties with entry restrictions for preservation, using three-dimensional data makes it easier to produce representations that promote understanding. At sites that want to balance preservation and public access, a strength is that the results of documentation surveys can be readily linked to measures for public utilization.

Another often-overlooked point is its effect on the continuity of management. Even when the results of cultural heritage surveys are preserved as reports, successors may not be able to make immediate use of them. Because three-dimensional data is visual and can be understood with spatial awareness, even less experienced staff can more easily grasp an entry point for understanding the current condition. Of course, if the data are too large or the viewing environment is limited, this can be counterproductive, but if the system is designed through to operational use, it becomes a highly valuable asset for handing over records.

In this way, three-dimensional surveying of cultural properties is not an end in itself of "measuring precisely." Its essence lies in creating a common foundation that connects multiple tasks such as preservation, repair, research, education, public access, and management. Therefore, when considering measurement methods, it is necessary to think not only about accuracy requirements but also about who will use the data and for what purpose, and which formats will make continued use easier.

6 Use Cases of 3D Surveying for Cultural Properties

From here, we introduce six representative use cases that show how 3D surveying of cultural properties can be applied in practice. In real-world situations, multiple objectives often overlap, so it is not uncommon for a single case to involve preservation, repair, and public display. What is important is to design the deliverables to suit the final purpose.

The first is its use for recording the current condition of buildings and for repair planning. In structures such as shrines and temples, private houses, gates, and storehouses, fine deformations—such as misalignment of columns and beams, unevenness of floors and eaves, warping of roof surfaces, and bulging of walls—affect repair policies. If the entire building is recorded three-dimensionally through 3D surveying, it becomes easier to visualize where tilting occurs and which parts exhibit the greatest deformation. This serves as an objective basis for comparison when considering whether partial repairs suffice or whether extensive corrective work is necessary. It is particularly well suited to capturing complex distortions and deformations that span multiple surfaces, which cannot be fully understood from hand-drawn measured surveys alone.

The second is understanding the displacement of stone walls and stone-built structures. Stone walls, stone monuments, stone Buddhist statues, stone steps, and the like can undergo displacements that are difficult to see due to aging deterioration, ground deformation, and changes in drainage conditions. By conducting three-dimensional surveying, you can record the positional relationships of individual stones, surface bulging, and trends of misalignment, making it easier to identify hazardous locations and perform ongoing monitoring. Even items that appear stable in planar photographs may show clear deterioration when viewed as cross-sections or difference views. For post-disaster restoration planning, pre-disaster data, if available, is effective as a reference for reconstruction.

The third is the recording and preservation of archaeological features and excavation results. In excavation surveys, the condition of features changes as digging progresses, and once a stratum or feature has been destroyed it cannot be restored. Therefore, the accuracy of records made at the site and at that time is extremely important. By using three-dimensional surveying, elevation differences of feature surfaces, stratigraphic relationships, and the shapes of soil profile cross-sections can be preserved as spatial information. This increases convenience when researchers later examine the data from different viewpoints or when creating illustrations for reports. It does not deny traditional measured drawings and photographs; rather, it serves to reinforce them and to enhance their potential for reexamination.

The fourth point is understanding the topography of gardens and historic-site spaces. For cultural properties that extend over an area—gardens, castle ruins, kofun burial mounds, and village landscapes—subtle terrain undulations, sightlines, and relationships with surrounding features are directly linked to understanding their value. By using three-dimensional surveying to capture the ground surface shape in detail, this information can be applied to drainage planning, circulation planning, consideration of protection boundaries, and the creation of explanatory materials. In particular, it is useful for making it easier to organize overall elevation differences and spatial configurations that span multiple points, which are difficult to grasp on site. It is also easy to use for before-and-after comparisons of refurbishment projects and serves as a basis for decisions that avoid excessive alterations.

The fifth is the recording and exhibition use of three-dimensional objects such as Buddhist statues and crafts. For cultural properties where movement or handling is restricted, being able to record their shape without contact is itself highly significant. If three-dimensional surveying is carried out on objects such as Buddhist statues, decorative elements, sculptures, and festival implements, the resulting data can be used not only to check their condition but also as interpretive material for displays and comparative material for research. Because complex forms and surface conditions can be captured three-dimensionally, features that are difficult to convey with photographs alone can be shared. They can also serve as foundational data for reproduction, packaging design, and transport planning.

The sixth is disaster preparedness and recovery support. Cultural properties are constantly exposed to risks such as earthquakes, heavy rain, landslides, and fires. Even if the importance of records is recognized after damage occurs, restoration decisions become difficult if the original condition is unknown. If three-dimensional survey data from normal times are available, comparing before and after a disaster is easier, and it becomes simpler to identify which parts were deformed or damaged and to what extent. In stakeholder consultations during restoration, being able to discuss based on data rather than memory or impressions increases the transparency of decision-making. In disaster prevention planning for cultural properties, three-dimensional surveying should be considered not as insurance for post-event response but as prior preparation.

What is common to these six cases is that 3D surveying does not, by itself, constitute a complete solution. Only by combining it with current-condition photos, existing drawings, records of past repairs, material information, environmental conditions, and so on does its practical value increase. Also, even when called the same "three-dimensional data," the level of detail required differs depending on whether it is for investigation records, design review, or presentation materials. For that reason, when using case studies as references, it is important to organize them from the perspective of "what the subject was, to what degree of accuracy, and ultimately who used it and how."

Common Mistakes in Three-Dimensional Surveying of Cultural Heritage

Three-dimensional surveying of cultural properties is an effective method, but if carried out incorrectly it often results in a situation where "despite the time and expense, the work cannot be used." Here we summarize failures that commonly occur in practice. By identifying these failure patterns in advance, the accuracy of decision-making at the contracting and implementation stages can be greatly improved.

The most common mistake is starting measurements while the purpose remains unclear. The mindset of "we just want to preserve it in three dimensions for now" may seem proactive, but in cultural heritage contexts, if the intended use of the deliverable is ambiguous, the data can become unnecessarily large, or conversely lack the required accuracy or coverage. If it is meant for restoration planning but lacks fine detail, or meant for public use but delivered in a format that is hard to present, the valuable data will end up unused. Three-dimensional surveying is not a one-size-fits-all solution, and because the optimal approach varies with each purpose, clarifying the objectives at the outset is extremely important.

Another common issue is overlooking constraints specific to cultural properties. Unlike general structural surveys, cultural properties have many conditions such as restricted access, prohibition of contact, lighting limitations, restricted working hours, consideration for visitors, and coordination with festival schedules. If these are not fully taken into account during planning, problems can occur such as being unable to measure from the required angles, increased shadows and blind spots, insufficient on-site time, and failing to capture the parts you want to record. For cultural properties, you must not "measure what is easy to measure," but instead "develop feasible methods that align with the values that should be preserved."

The third is a mismatch in perceptions of accuracy. Clients tend to think, "we want highly accurate measurements," but what counts as "high accuracy" is often not shared. Accuracy comes in different types: overall positional accuracy, dimensional accuracy of components, reproducibility of surface irregularities, and alignment with coordinate systems. For example, broad-area terrain mapping and capturing the fine shapes of decorative carvings require different performance and different methods. If this remains vague, the client may feel "coarser than expected," while the contractor may think "the specifications are being met," producing a discrepancy.

Fourth, the volume of data can be so large that it becomes unmanageable. Three-dimensional surveying generates massive amounts of data, and if you proceed without considering methods for storage, viewing, and sharing, you can end up in a situation where the responsible staff cannot open the files, cannot share them within the agency, or cannot locate them later. Because records of cultural properties are often intended for long-term preservation, it is insufficient for them to be merely viewable at the time of delivery. It is important that they be organized in a form that is easy for future staff to access and that they be linked to related materials.

The fifth issue is that the deliverables do not make it into on-site operations. If only a few figures are included in a report and the methods for viewing or reusing the original data are not shared, even a valuable three-dimensional survey will end up as a one-off project. In practical work on cultural properties, multiple departments—such as survey, conservation, repair, public display, education, and disaster prevention—are involved, so it is necessary to anticipate in advance who will use the data and in which situations. Deliverables whose purposes are not concretely defined will not become established within the organization, even if they contain good data.

The sixth issue is insufficient positional referencing, which makes later comparisons difficult. For cultural properties, aligning repeat surveys can be important for tracking changes over time or for before-and-after comparisons following disasters. However, if reference points or the handling of coordinates are ambiguous in the initial survey, it becomes hard to reconcile subsequent data. A 3D model that looks good as a one-off presentation is unlikely to become an asset for ongoing management. For projects that may be re-surveyed in the future, the design of positional information should not be neglected.

How to Proceed to Avoid Failure

So how should you proceed to avoid such failures? In three-dimensional surveying of cultural properties, project planning — prior to equipment selection and field techniques — determines success or failure. Here, we explain in a step-by-step sequence the procedures that those in charge should understand.

The first thing you should do is verbalize the intended use. Saying "for archival records" is not sufficient. For example, whether you plan to use the data as baseline material for repair planning, for comparing deformations, for streamlining drawings in reports, or for use in exhibitions and explanations will change the required measurement density and the form of deliverables. If a single project has multiple purposes, it is important to set priorities. Clarifying the primary purpose makes the results more useful than trying to satisfy everything and ending up with a half-finished outcome.

Next, organize the values and constraints of the subject. For cultural properties, conditions such as which areas are important, which must not be touched, which time windows allow work to be carried out, and how much can be disclosed as public information directly affect the outcomes. If the survey scope is expanded too much, the essential focus areas become coarse; conversely, if it is too narrow, the surrounding context becomes invisible. Distinguishing whether an overall understanding is required or whether detailed documentation of specific parts is needed makes it easier to develop a plan with minimal waste.

Then decide the required deliverables in advance. Organizing whether you need point cloud data, a three-dimensional model, cross-sectional drawings, orthoimages, videos, or explanatory still images will make it easier to choose acquisition methods. On site, there is a tendency to take the “just give me everything for now” approach, but that can simply increase management burden. It is important to consider what deliverables will be easy to use within your organization, including the viewing environment.

The next point is not to overlook the handling of location information. In cultural property surveys, attention tends to focus on shape acquisition itself, but if you consider future comparisons and coordination with surrounding site improvements, consistency of coordinates becomes important. For projects that may be re-surveyed or that continue surveys over multiple years, you should decide early on how to handle control points, the coordinate system, the elevation datum, and the policy for reconciling with drawings. If these are in place, later considerations for repairs and disaster response become considerably easier.

What's even more important is on-site inspection and trial runs. Cultural properties vary greatly from subject to subject, and you cannot always determine the optimal method based solely on preliminary materials. This is because many factors—how light falls, surface reflections, shading from trees or fences, scaffolding or footing conditions, and surrounding circulation—only become clear when you see the site. If possible, conduct small-scale trials and on-site checks to confirm the required density and whether there are blind spots before starting the main work, which will reduce the likelihood of failure.

Operational design after delivery is also indispensable. If you do not decide where the deliverables will be stored, who can access them, and in which tasks they will be used, the data will not be utilized. It is necessary to prepare with the assumption of continued practical use, such as file names and folder structures, linking with related photographs, whether simplified viewing data is available, and explanatory materials for successors. It is not an exaggeration to say that in three-dimensional surveying, the difference is made more by operations than by measurement.

Aligning understanding among stakeholders is also important. Depending on their roles—cultural property administration, owners, researchers, conservation technicians, public outreach staff, etc.—they will expect different outcomes. Some may emphasize reproduction of fine details, others may prioritize positional information, and others may seek easy-to-understand explanatory materials. By reconciling these expectations in advance, the direction of the deliverables is less likely to deviate. In practice, mismatches in expectations often lead to later dissatisfaction more than technical problems do.

Operational Perspectives for Leveraging Three-Dimensional Surveying in Cultural Heritage Practice

Three-dimensional surveying does not have its value determined at the moment of acquisition. To produce real results in cultural heritage practice, an operational perspective—specifically how it connects to daily management and future projects—is indispensable. Here, we outline the points that will make a difference after implementation.

The first thing to keep in mind is not to let it end as a "one-off record." Because cultural heritage changes over time, designing measurements so they can be remeasured to the same standards increases the value of longitudinal comparisons. You don't need to establish a perfect continuous monitoring system from the first survey, but thinking about what you want to compare in the future, how often (in years) you want to check, and what scope would be reproducible will greatly change the significance of the initial survey. In particular, for objects where progression of deterioration is a concern, you should develop a recording plan on the premise of capturing changes over time.

Next, this is the perspective of linking to existing drawings and ledgers. Even if three-dimensional data exists independently, it becomes difficult to use on site unless it is connected to the cultural property ledger, site layout plans, repair histories, and photo ledgers. Organizing the metadata—such as which data corresponds to which fiscal year and project, what the scope of the subject is, and whether it represents conditions before or after repairs—will determine its future usability. How information is organized is as important as the precision of the data.

Also, it is important to vary how you present information for different viewers. While detailed point clouds and cross‑section inspections are effective for specialists, clear still images or simplified models can be more communicative for internal administrative briefings or for sharing with owners. Preparing multiple ways of presenting the same source data for different contexts—preservation, research, and public dissemination—increases return on investment. In 3D surveying, the value lies less in "the data itself" and more in "being able to convert it into the form required for each situation."

Connections to disaster preparedness should not be overlooked. To make peacetime records useful during disasters, you must ensure that responsible personnel can access them even in an emergency. If storage locations are too restricted or viewing procedures are too complicated, they will be unusable in an emergency. Simply organizing the drawings and comparison data that you need to check at minimum in an emergency can aid decision-making in the initial recovery phase. Disaster preparedness for cultural properties should be considered not only in terms of equipment but also from the perspective of preparing recorded information.

In terms of procurement and contracting, it is important to place emphasis on the transferability of deliverables. If deliverables are in a form that only a specific person or contractor can handle, they may not be reusable a few years later. Because records of cultural properties are long-term assets, you must confirm whether the methods of access, data structure, and explanations of related materials are handed over. Especially for municipalities and managing organizations, where personnel changes and project renewals are to be expected, it is realistic to aim for a state in which "anyone can use it at a minimum."

And another important factor is immediacy on site. In cultural heritage surveys, there are many situations where decisions need to be made in the field. There is a need to confirm on the spot whether any shots were missed, to link photos and records while fixing positions, and to efficiently produce results within limited access times. In such situations, not only a post-processing-centered workflow but also a system that makes it easy to link position and records on site will improve the overall quality of the work. To embed 3D surveying into cultural heritage practice, not only high accuracy but also portability and practical operability in the field are important.

In that sense, at cultural heritage sites it can be effective to distinguish between specialized three-dimensional surveying and routine position recording. While large-scale surveys and precise documentation are carried out in a planned manner, portable, ready-to-use high-precision positioning methods are better suited for daily inspections, partial repairs, simple as-built checks, and assigning location information to photographic records. For example, if you can record on-site while attaching accurate location information to photos and notes, it becomes easier to reconcile later three-dimensional data and drawings, and the consistency of the records is improved.

Cultural heritage management cannot be sustained by a single large survey conducted once a year. Only when operations are in place that do not overlook small changes and can accurately capture the needed locations at the right times does the value of three-dimensional surveying come to life.

By basing work on precise three-dimensional records and combining them with iPhone-mounted GNSS high-precision positioning devices like LRTK for routine on-site documentation, it becomes easier to improve the positional accuracy of photographs, inspection records, and repair histories.

In cultural heritage practice, having high-precision location recording methods that field staff can use immediately—not just relying on heavy-duty surveying—contributes to the resilience of continuous preservation management.

Summary

What three-dimensional surveying of cultural heritage can do is not limited to mere three-dimensional recording. It provides great value by forming the foundation for a wide range of activities, from preserving current conditions and detecting deformations to guiding repair decisions, supporting research, enabling public use, and disaster response. In particular, the ability to objectively preserve the shapes and spatial relationships of diverse subjects—such as buildings, stone walls, ruins, gardens, and three-dimensional artifacts—has great significance for the preservation and transmission of cultural heritage.

On the other hand, if introduced while the objectives remain unclear, failures such as not meeting the required accuracy, producing data that is too large to use, or failing to be adopted in field operations are likely to occur. To avoid such failures, it is essential to clarify what you are measuring for, to organize the value and constraints of the subject, and to design the process including the necessary deliverables and operational methods. It is practical to regard three-dimensional surveying of cultural heritage not only as the selection of measurement technologies but as the very design of the workflows for preservation and utilization.

In the field of cultural property management, the idea of combining precise three-dimensional surveying with high-precision positional records that are easy to handle on a daily basis is effective. Leverage three-dimensional surveying for detailed records during regular inspections and before repairs, and incorporate fast-to-use high-precision positioning devices for daily checks, photographic records, and locating partial repairs to improve the continuity of records. If you want to operate while securing positions accurately on site, iPhone-mounted GNSS high-precision positioning devices such as LRTK are a strong option. What is needed to protect cultural properties is not technology used only during special investigations, but systems that can be used continuously and without strain in everyday management. When considering the introduction of three-dimensional surveying, be sure to include that perspective in the overall system design.