8 Ways to Use 3D Measurement for Shrines and Temples｜From Preservation and Restoration to Public Access

Table of Contents

• Why 3D measurement is needed for shrines and temples

• Use 1 Record current conditions with high precision as the basis for preservation materials

• Use 2 Help understand deterioration and deformation

• Use 3 Use for preservation and restoration planning and consensus building

• Use 4 Preserve baseline data for recovery from disasters and accidents

• Use 5 Apply to progress checks and construction management during works

• Use 6 Use as material for precinct improvement and circulation planning

• Use 7 Improve the quality of public access, utilization, exhibitions, and education

• Use 8 Incorporate into maintenance ledgers and long-term monitoring

• How to proceed to make 3D measurement for shrines and temples a success

• Summary

Why 3D measurement is needed for shrines and temples

Shrines and temples have difficulties that differ from ordinary buildings. First, the building forms themselves are complex. Roof curvature, eaves projection, the way pillars and beams are joined, relationships with podiums and stone steps, the three-dimensionality of decorative members—these are points of interest and important management aspects that cannot be fully represented by simple planar information alone. Furthermore, value is often constituted not only by a single building but by gates, corridors, stone monuments, trees, approach paths, and the precinct topography, so understanding including the surrounding environment is indispensable.

Also, shrines and temples often underwent repeated additions, alterations, and repairs over long periods, so drawings can be insufficient or differ from the current condition. When information becomes fragmented each time a person in charge changes, it becomes difficult to know when, where, and how repairs were made, complicating future repair decisions. 3D measurement is effective as a foundation for objectively sharing the current condition and escaping such person-dependent management.

In addition, for buildings and precinct facilities with cultural property value, there is often a request to understand the situation as non-invasively as possible. If the survey is organized mainly around non-contact measurement methods, necessary information can be collected while minimizing the risk of damaging the subject. This is important not only from the perspective of preservation but also to reduce survey burden in places that remain in everyday use.

The greatest reason 3D measurement is useful is the reusability of information. Once properly acquired, three-dimensional data can be used for drawings, dimensional checks, comparative studies, explanatory materials, public content, and many other purposes. Because you can confirm much of the information afterward without repeatedly entering the site, both operational efficiency and decision-making reliability improve. The value of 3D measurement grows especially for objects like shrines and temples where the opportunity for a survey must be treated as precious.

Use 1 Record current conditions with high precision as the basis for preservation materials

The most basic use of 3D measurement for shrines and temples is recording the current condition. Preserving the current state as objectively and as precisely as possible becomes the starting point for conservation, repair, and future study. When people think of current condition records, they often imagine photography, and photos are excellent at preserving appearance, but they have limitations in capturing positional relationships, dimensions, and three-dimensional deformation. By incorporating 3D measurement, you can record not only appearance but the shape itself.

For example, if you record three-dimensionally the exterior of the main hall and worship hall, roof undulations, pillar arrangements, floor height relationships, and connections to stone steps and approach paths, you can begin basic planning for repairs or maintenance later without visiting the site. If you record the entire precinct, you gain material to infer not only the buildings but also surrounding ground elevation, clearances to trees, approach slopes, and drainage flows.

The value of current condition records is not only for the present. Shrines and temples are observed over decades, and as people in charge and stakeholders change, having records that can explain what condition existed at what time is extremely important. Written records leave room for interpretation, but three-dimensional data functions as a more objective common foundation. Especially for future repairs, preserving the "pre-repair appearance" is valuable as a basis for later comparison if alterations or deterioration progress.

Moreover, by carefully recording the current condition, it becomes easier to generate floor plans, elevations, sections, and site plans as needed. In practice, it is very effective to keep information in a form that can serve multiple purposes later rather than limiting the use too narrowly from the outset. Even if inspection items not anticipated at the time of survey arise later, having three-dimensional data expands the range of possible responses.

In short, 3D measurement as a current condition record is not merely archival data. It is a long-term asset that supports future decision-making. For preservation work on shrines and temples, understanding and adopting this positioning is important.

Use 2 Help understand deterioration and deformation

For buildings and precinct facilities at shrines and temples, it is important to detect deterioration and deformation due to aging early. Warping of timber, leaning of pillars, unevenness of floors, settlement of podiums, displacement of stone steps, bulging of retaining walls and stone walls—judging these from appearance alone can lead to large errors. Using 3D measurement makes it easier to capture such changes as shape information.

A common practical issue is how to convert vague concerns like "it looks like it's leaning" or "it feels like it has sunk compared to before" into objective information. Shrines and temples are often irregular in shape and hard to establish reference planes for, making visual judgment difficult. With three-dimensional data, you can check leaning and height differences on multiple sections or compare positional relationships at specific points. This allows for more concrete discussion on repair priorities and the need for ongoing observation.

Also, if you measure the same location at different times, you gain material for comparing whether changes have occurred. A single measurement only captures the current state, but continuous records make it easier to determine which issues are progressive and which are stable. This is crucial for shrines and temples that must be managed with limited budgets and personnel, because such information directly influences decisions—whether to proceed to large-scale repairs immediately, whether local repairs are sufficient, or whether periodic monitoring should continue.

Furthermore, in deterioration surveys, differences in recognition between people on site and those remote can be problematic, but 3D data makes it easier to share the three-dimensional condition. It becomes easier for responsible staff, designers, construction teams, and external conservation experts to explain the location and extent of problems, reducing unnecessary back-and-forth confirmations. As a result, the flow from survey to decision becomes smoother.

For shrines and temples, both aesthetic appearance and structural stability need to be considered. 3D measurement is an effective means to support non-sensory-based understanding of deterioration by objectively capturing shape changes.

Use 3 Use for preservation and restoration planning and consensus building

In preservation and restoration practice, it is necessary to carefully consider what to repair and to what extent, which parts to retain, and which parts to intervene in. Crucial in this process is that all stakeholders share the same understanding of the current condition. 3D measurement not only improves the accuracy of restoration plans but is also highly effective in facilitating consensus building.

Repair policy for shrines and temples is not simply about making things new and clean. Decisions must be made considering multiple perspectives such as historical value, design characteristics, usage, safety, and maintainability. Therefore, floor plans and a few photos alone may fail to sufficiently share the complexity of the current condition. With 3D data, you can inspect the overall shape of the building and the relationships between parts in three dimensions, reducing misunderstandings at the planning stage.

For example, it is easier to understand in three dimensions the extent of deformation around a roof, how the eaves detail relates to adjacent members, or how renovating stone steps might affect the overall slope of an approach. Having such information makes it easier not only for investigators but also for clients and managers to make decisions. In situations that require technical explanation, being able to show the form as well as describe it verbally is a major advantage.

In addition, in preservation and restoration, insufficient preliminary consideration before construction often affects later stages. If dimensions need to be remeasured or designs changed after entering the site, the burden on stakeholders increases and schedules can be affected. Conducting 3D measurement at an early stage and advancing necessary confirmations in advance increases the reliability of planning. Of course, not everything can be completed with three-dimensional data alone, but at least as a framework for understanding and negotiation it is extremely useful.

From the perspective of consensus building, it also helps when determining repair priorities. Looking at the entire precinct, it becomes easier to grasp spatially which areas show prominent deterioration, which affect visitor safety or circulation, and which should be prioritized for conservation from the viewpoint of cultural value. 3D measurement supports preservation and restoration of shrines and temples by enabling progression based on shared information rather than only on experience and intuition.

Use 4 Preserve baseline data for recovery from disasters and accidents

Shrines and temples are exposed to various risks such as wind and water damage, earthquakes, fires, fallen trees, snow loads, and landslides. If damage occurs, how accurately the pre-disaster condition was recorded greatly affects recovery and reorganization. In this sense, 3D measurement can be considered one of the disaster prevention measures carried out during normal times.

After a disaster, safety and emergency response take priority, so it may be difficult to calmly take detailed records. Moreover, when collapse, washout, or burning occur, clues to the original shape may be lost. If three-dimensional data is preserved beforehand, you can at least confirm pre-disaster shapes, arrangements, height relationships, and relations with surroundings, aiding the formulation of recovery policies.

Especially at shrines and temples, spatial value is formed not only by buildings but also by lanterns, guardian dogs, stone monuments, stone steps, fences, approach paths, and relationships with trees. In post-disaster recovery, it is necessary not simply to restore buildings but to recover the precinct’s context as a whole. If 3D measurement has recorded a wide area, you can understand not only individual components but also overall positional relationships, which is useful for decision-making during recovery.

Also, even in cases of accidents or partial damage where the affected area is limited, having pre-disaster data makes it easier to compare how specific parts have changed. This facilitates selection of repair methods and considerations for preventing recurrence. The availability of objective materials is also valuable when explaining the situation to insurers or administrative bodies.

When thinking about disaster preparedness, direct measures like firefighting equipment and evacuation plans tend to get attention, but record preparedness is equally important. Because the value of shrines and temples is difficult to restore once lost, conducting 3D measurement in normal times and preserving baseline data for recovery is highly meaningful.

Use 5 Apply to progress checks and construction management during works

3D measurement can be used not only for surveys and planning but also for managing construction work. Repairs and precinct improvements at shrines and temples require particular care regarding existing features, limited working space, impacts on visitor circulation, and interference with temporary facilities—management considerations that often exceed those of ordinary construction. Being able to capture the state before and after construction or at intermediate stages in three dimensions is effective for both progress checking and quality assurance.

For instance, with stone step repair, approach improvements, drainage upgrades, ground leveling in the precinct, or exterior updates, not only appearance after completion but also heights, slopes, and connections to surroundings are important. Incorporating 3D measurement makes it easier to compare pre- and post-construction states and provides material to confirm whether the work was completed as planned. This is useful not only for final explanations but also for mid-course corrections during construction.

Furthermore, in shrines and temples, "no-touch areas" and "areas to be worked on" are often adjacent, so managing the construction scope is important. If you understand the site in three dimensions, you can apply that knowledge to protection planning, temporary facility layout, and material flow paths. This makes it easier to share the situation not only with on-site staff but also with stakeholders who are not constantly present, helping to prevent omissions in checks.

From the viewpoint of recording milestones, it is also effective. If you record the state at each construction milestone, it becomes easier to review parts that will be concealed later or aspects you want to verify in the interim. In shrine and temple works, important decision-making information is often included in elements that will be hidden after completion, so milestone records are highly meaningful.

The essence of 3D measurement in construction management is not to make the work look impressive but to enable stakeholders to correctly share the site condition and improve the quality of checks. At sites like shrines and temples where careful consideration is required, that value is particularly high.

Use 6 Use as material for precinct improvement and circulation planning

In practical work for shrines and temples, precinct improvement is an important theme not only for the buildings themselves but for the whole precinct. Elements such as visitor safety, circulation, movement during ceremonies, barrier-free considerations, placement of signage, nighttime lighting, and disaster evacuation routes are intertwined. 3D measurement provides the foundation for comprehensively understanding the entire space in three dimensions for such precinct improvement studies.

The precinct of a shrine or temple is not a flat empty lot. Stone steps, slopes, trees, hall placement, purification font, gates, walls, shrine offices, and rest areas all interact complexly. Daily visitor circulation may differ from movement during festivals, and a single drawing may fail to capture the reality. With 3D measurement you can more readily see height differences, sightlines, and clearances from buildings and equipment, improving the accuracy of improvement planning.

For example, when identifying steep sections of an approach, routes that become slippery in rain, paths where vehicle access or material delivery is difficult, or congestion-prone waiting points, three-dimensional information is very helpful. In particular, when improving for user experience and safety, not only horizontal distance but actual ascents and descents and visibility matter, so the value of three-dimensional understanding increases.

Also, aesthetic considerations are indispensable at shrines and temples. While introducing guidance equipment or safety measures, there is a desire not to spoil the historical landscape. When studies are conducted based on 3D measurement, it is easier to discuss where additions would be too conspicuous and from which viewpoints appearances should be considered. The perspective of capturing the whole space is important to balance function and landscape.

Precinct improvement is not mere facility renewal. It is work to enhance usability without diminishing the value of the shrine or temple. As material to support such decisions, 3D measurement has very practical significance.

Use 7 Improve the quality of public access, utilization, exhibitions, and education

To pass on the value of shrines and temples to the future, it is important not only to preserve and restore them but also to devise ways to open and utilize them. Information obtained from 3D measurement can be used as a basis for explaining to visitors, exhibition materials, educational purposes, and remote access. This is not merely for creating attractive visuals but for communicating information that is hard to perceive on site in an understandable way.

Shrines and temples often include places that cannot be approached, areas that can only be confirmed by looking up, and spaces with restricted access due to the nature of worship and viewing. Based on 3D measurement, the shape of roofs, the three-dimensionality of fine details, and the configuration of the entire precinct can be presented in ways that are easier to understand. Conveying features that are hard to notice on site deepens visitors' understanding and interest.

It is also effective for showing comparisons before and after repairs and for introducing parts normally not visible. Preservation and restoration are specialized activities that are hard for the general public to see, but using three-dimensional information makes it easier to explain what changed, where, and why the repair was necessary. This is a great help for managers in communicating the significance of preservation activities.

3D measurement also has value in education. In local history education, architectural studies, disaster prevention education, and cultural property understanding, three-dimensional information facilitates intuitive understanding. Especially for people who find it difficult to visit a site, three-dimensional material aids spatial comprehension more than photos alone. Using 3D data to disseminate the value of shrines and temples both within and outside the region has great potential.

When using 3D data for public access, it is important not to foreground the technology too much. The shrine or temple itself should remain the focus; 3D measurement is merely a means to present its value more effectively. Approached in this way, the use of 3D measurement can link preservation and public access rather than set them in opposition.

Use 8 Incorporate into maintenance ledgers and long-term monitoring

Management of shrines and temples is not completed by a one-off repair. Continuous maintenance is required—daily inspections, periodic repairs, responses to environmental change, accident prevention, and review of future plans. Therefore, 3D measurement demonstrates its true effect when incorporated into maintenance ledgers and long-term monitoring systems rather than treated as a one-time event.

For example, when organizing which element of a building or precinct was treated when and how, three-dimensional data makes it easier to correlate with location information. Ledgers consisting only of text and photos can become time-consuming to interpret when personnel change, but a three-dimensional foundation makes it easier to identify problem locations and surrounding relationships. This is also effective for improving the quality of handovers.

Also, if you establish a system to periodically measure the same area and compare results, it becomes easier to grasp long-term changes. Building lean, ground settlement, degradation of approaches, drainage effects, and deterioration of stonework may be difficult to judge in the short term, but observed at regular intervals, signs become apparent. If big problems can be addressed before they become obvious, both preservation quality and management efficiency improve.

At shrines and temples, people involved include those responsible for daily cleaning and inspections, those organizing events, and specialists performing repairs—many roles with different expertise. If maintenance ledgers include information derived from 3D measurement, it becomes easier for people with different specialties to share the situation. This is crucial for turning on-site observations into the next action.

Long-term monitoring may sound large-scale, but the essence is simple: do not measure a shrine or temple once and finish; cultivate records as assets that allow you to track change. With this mindset, 3D measurement becomes not just the latest technology but part of the management foundation.

How to proceed to make 3D measurement for shrines and temples a success

So far we have introduced eight uses, but to actually achieve results it is important to proceed not by indiscriminate measurement but by considering an approach tailored to objectives. Common failures in 3D measurement for shrines and temples include measuring far more widely than necessary and failing to organize the results, or conversely omitting required areas and making the data hard to use later. The key to success is to clarify the intended uses at the outset.

First, organize the purpose of the measurement. Whether the goal is current-condition preservation, repair planning, precinct improvement studies, or public utilization will affect the required accuracy, target range, and recording methods. Even if data appears usable for everything, practical priorities differ. Clear purposes reduce the likelihood of missing necessary information.

Second, be mindful of setting the measurement range to include surroundings rather than only individual buildings. For shrines and temples, the relationship between buildings and ground, approach paths, stone walls, trees, and adjacent facilities is important. Aiming too narrowly at the minimum necessary can cause trouble later when confirming positional relationships. On the other hand, extending indiscriminately to areas with little anticipated use increases the burden of organization and operation. It is realistic to set the range with some margin based on likely uses.

Third, think in advance about how the deliverables will be used. Not only the three-dimensional data itself but how it will be reused—as drawings, comparative materials, explanatory images, inspection documents, etc.—will determine acquisition and organization policies. In shrine and temple work, the person who acquires data is not always the one who uses it, so organizing data for later usability is especially important.

Fourth, assume continued use. Rather than ending a project as a one-off, consider how it will connect to future inspections, repairs, public access, and handovers; this increases the return on investment for 3D measurement. Considering naming rules for records, storage methods, update timing, and how to share with stakeholders helps prevent valuable data from being neglected.

Finally, avoid increasing on-site burden too much. Because daily operations and events take precedence at shrines and temples, a survey for the sake of surveying will not be sustainable. A pragmatic approach is to gradually build the management foundation while balancing required accuracy and operational load. 3D measurement is not omnipotent, but if introduced with specific objectives and in phases, it becomes a powerful tool to support preservation and utilization of shrines and temples.

Summary

3D measurement for shrines and temples is not merely a technology to create three-dimensional data. It is a practical foundation for accurately recording current conditions, understanding deterioration and deformation, planning preservation and restoration, preparing for disaster recovery, supporting construction management, considering precinct improvements, expanding public utilization, and continuously improving maintenance. Especially for targets like shrines and temples where historicity, landscape, public nature, and continued use overlap, the value of 3D measurement is very high.

What matters is not to treat 3D measurement as a temporary trend or a technology for show. Only by clarifying why you measure, who will use the data, and which workflows it will feed into can practical results emerge. In shrine and temple management, the quality of records determines the quality of future decisions. In that sense, 3D measurement can be regarded as long-lasting foundational work that enables both preservation and utilization.

If you want to capture the positional information of precincts and related facilities more accurately while improving the efficiency of surveys and records, using site-friendly positioning devices is also effective. For example, LRTK, an iPhone-mounted high-precision GNSS positioning device, helps improve the accuracy of georeferenced records and on-site confirmations. In addition to 3D measurement itself, it is an accessible option for practitioners who want to enhance the accuracy of control point checks, unify record positions, and organize survey information. If you want to advance preservation, restoration, and public use of shrines and temples based not on intuition but on reusable records, considering such site-oriented devices alongside 3D measurement can further raise the overall quality of work.