What are the benefits of drone surveying? 6 reasons it improves work efficiency

Table of Contents

• Why drone surveying is attracting attention

• Benefit 1 of drone surveying: Easy to assess wide areas in a short time

• Advantage 2 of drone surveying: Easier to manage sites with a small crew

• Benefit 3 of drone surveying: Easy to inspect high and hazardous locations without physical contact

• Benefit 4 of drone surveying: Photos and point clouds improve the quality of records

• Advantage 5 of drone surveying: easy to leverage for pre- and post-construction comparisons and as-built verification

• Benefit 6 of drone surveying: Faster sharing with stakeholders facilitates quicker decision-making.

• Considerations for maximizing the benefits of drone surveying

• Summary

Why Drone Surveying Is Attracting Attention

Drone surveying is attracting attention across a wide range of fields—construction, civil engineering, land development, maintenance management, and disaster response—as a method that can efficiently capture site terrain and the condition of structures from above. Conventional surveying, while capable of producing highly accurate results, has the drawback of requiring extensive on-site movement, and the larger the area to be surveyed, the more time and manpower it tends to require. In particular, in situations such as slope faces, embankments, cuttings, temporary stockpiles, and assessing the current conditions of large sites, the workload increases proportionally as the area to be measured grows.

One method attracting attention is drone surveying, which can collect information across an area from above. Rather than tracking points one by one on the ground, it captures the entire target area from an aerial perspective and can later be organized into three-dimensional data and orthophotos, making it easy to change the very way fieldwork is approached. It’s not just about taking pictures from the air; its ability to support current-condition assessment, earthwork volume calculations, progress monitoring, as-built management, and stakeholder sharing delivers significant value to practitioners.

However, the benefits of drone surveying are not naturally obtained simply by introducing new equipment. Only by organizing operations — including flight planning, imaging conditions, the approach to control points, processing workflows, and methods of sharing — will improvements in work efficiency actually appear. To determine whether it is truly useful in the field, it is important to have a concrete understanding of what will be streamlined and how.

This article clearly organizes, for practitioners searching for drone surveying, six practical reasons why work efficiency changes. Rather than offering mere generalities, it carefully explains why on-site work becomes easier, which steps in the workflow benefit, and in what situations drone surveying demonstrates its true value.

Advantage 1 of Drone Surveying: Easier to Grasp Wide Areas Quickly

The most readily apparent benefit of drone surveying is that it makes it easy to capture large areas in a short time. With conventional ground surveying, you need to set control points and follow them in sequence, and as the target area expands, travel time and setup time increase. Especially on wide, open areas with good visibility—such as development sites, material storage yards, solar-related sites, road corridors, river surroundings, and farmland—the time spent walking on site itself tends to become a significant burden.

On the other hand, drone surveying is well suited to collecting area-based information because it can continuously acquire data from the air according to a flight plan. Since it can cover in a short time the areas that were previously checked one by one on the ground, it speeds up the initial grasp of the current situation. This is not merely a matter of saving time. Being able to grasp a wide area at once makes it easier to capture information that is difficult to see from individual points, such as the overall site's undulations and drainage flow, the placement of temporary structures, how materials are stored, and the relationship with adjacent land.

In practical work, the speed at which you initially grasp the situation is extremely important. For example, if the overall picture can be clarified quickly during a pre-construction site survey, it becomes clear which areas should be prioritized for on-the-ground inspections. Rather than relying solely on aerial survey results, using them as material to set priorities for ground work ultimately leads to optimization of the overall work effort. Instead of conducting uniform human checks across the entire area, shifting to a process of broadly assessing with aerial data and then deep-diving into necessary locations can reduce unnecessary travel and duplicate checks.

Also, the fact that data can be re-acquired over short periods should not be overlooked. A site is not finished after a single measurement; conditions change before, during, and after construction. Chasing a wide area every time is a heavy burden, but with drone surveying you can regularly capture the same area to make changes easier to see. This makes it easier to continuously monitor progress, changes in earthwork volumes, and differences in site development conditions, and to collect the information needed for site management in a timely manner.

In short, the efficiency of drone surveying does not simply come from shorter flight times. The real benefit is that by capturing a wide area quickly and comprehensively, the subsequent workflow of verification, decision-making, and sharing is also accelerated.

Benefit 2 of Drone Surveying: Easier to Manage Sites with a Small Team

The second advantage of drone surveying is that it makes it easier to manage a site with a small crew. On sites where labor shortages are a recurring problem, it is not uncommon to be unable to secure a dedicated surveyor. Especially at small- to medium-sized sites, or where multiple projects are being handled in parallel, limited personnel must handle everything from site inspections and construction management to photo organization and report preparation. In such circumstances, operations that require many people to measure a large site place a heavy burden and tend to slow down the overall progress of the site.

Drone surveying requires pre-flight preparations and safety checks, but because it can reduce the amount of wide-area walking on the ground, it is consequently well suited to small-team operations. There are increasing situations where it is no longer necessary for many people to chase survey points to acquire data for the entire site. Of course, depending on site conditions, assistants may still be needed in some cases, but even so, the way people move changes significantly compared with traditional full-scale ground surveying.

The essence of this change is not simply a reduction in headcount. The fact that tasks can be handled with fewer people means that, with the same number of personnel, it becomes easier to allocate time to other duties. For example, if you can compress the on‑site time required to assess current conditions, you can use the saved time for ground-level key-point checks, revising construction plans, comparing results with as-built conditions, and preparing briefings for stakeholders. By making it less likely that people are tied up solely for surveying, the productivity of the entire site increases.

Furthermore, being able to review the collected data afterward is also a factor that supports small-team operations. Repeatedly going back and forth to the same location just because you’re worried about overlooking something on site is inefficient. If you record information as photographs and three-dimensional data through drone surveying, the range of what can be checked without returning to the site expands. The reassurance of being able to verify things afterward is especially meaningful at sites with few personnel.

On-site, not only the time for the work itself but also setup time, travel time, and time spent rechecking accumulate. Because drone surveying makes it easier to reduce these hard-to-see losses, it becomes easier to run a site with fewer people. Sites that want to increase their responsiveness without adding personnel will feel this benefit most.

Drone Surveying Advantage 3: Easier to Inspect High and Hazardous Locations Without Direct Contact

The third advantage is that it makes it easy to inspect high or hazardous areas without physical contact. At worksites there are many places that are difficult for people to approach or where approaching itself carries risks. For example, steep slopes, locations at risk of collapse, waterfronts, embankments with poor footing, areas where heavy machinery is operating, and locations that affect traffic — at such places, not only does inspection from the ground take more time, but safety considerations also increase.

If people force themselves to walk through such locations to carry out inspections, the amount of safety measures required increases and the area that can be inspected tends to be limited. As a result, the places you most want to see become harder to approach, and the quality of the inspection may suffer. Drone surveying makes it possible to assess the target from above, so it becomes easier to check conditions without people having to enter hazardous areas directly. It is important not only from the perspective of ensuring safety but also because it can reduce the psychological burden of inspection work.

In field operations, safety and efficiency cannot be separated. When teams are forced into the choice of taking extra time because a task is dangerous or skimping on checks because there isn’t enough time, either option puts strain on site management. Drone surveying makes it easier to change this dynamic by replacing the act of checking hazardous areas with a different method. Its chief value is that, rather than taking a detour in the name of safety, it makes it easier to both increase safety and raise the density of inspections.

Also, because it can be captured non-contact, it becomes easier to explain matters to stakeholders. Even in situations where not everyone can enter the site, the acquired images and three-dimensional data can be used to share the situation. This helps shift from a state in which only the person in charge understands the site conditions to one in which all stakeholders can share the current status. Information obtained by a highly safe method can be used directly as a basis for decision-making.

Of course, it is not possible to complete all checks of hazardous areas using only drones. Inspections that require close-up examination or physical contact need alternative methods. However, even being able to carry out overall assessments and initial checks non-contact can significantly change on-site safety planning and work efficiency. This advantage is a major factor driving the adoption of drone surveying, especially at sites that include hazardous areas.

Drone Surveying Benefit 4: Improved Record Quality with Photos and Point Clouds

The fourth advantage is that the quality of records is improved by photos and point clouds. In surveying and site-condition inspections, it is extremely important not only to grasp the situation on site but also to leave records in a form that can be explained later. At job sites there are many situations where you must later explain why a decision was made, what the condition was before work began, and which parts changed and how after construction. If the records are insufficient at that time, rechecks or revisits to the site will be necessary, causing rework.

In drone surveying, because images taken from above can be easily organized as orthophotos and terrain preserved as three-dimensional point cloud data, site documentation is greatly improved. Elevation differences, slope geometry, the volume of deposits, and the positional relationships of structures — which are difficult to discern from flat photographs alone — become easier to understand in three dimensions. This is not simply about producing more visually appealing materials; it means there is more objective evidence available to explain the condition of the site.

When relying solely on photographic records, information can be heavily influenced by the photographer’s viewpoint and shooting position, making it difficult for a different person to grasp the overall picture later. This is because it’s hard to convey which direction a photo was taken in, how large the subject is, and what the positional relationship with the surroundings is. Aerial images and three-dimensional data obtained from drone surveying can readily compensate for those weaknesses and have the advantage of high information reusability.

Also, when the quality of records improves, internal and external review processes become smoother. Construction staff, designers, managers, and clients each have slightly different points they want to check, but if images and point clouds are organized, it becomes easier to perform the necessary checks using the same data. This makes it easier to shift from a situation where only the person who visited the site understands, to one where multiple people can share the same understanding by looking at the data, thereby helping to eliminate dependence on individual staff.

High-quality records may at first appear to be only loosely related to efficiency. However, in practice, fewer reworks, faster explanations, and the availability of the information needed for decision-making directly lead to reductions in man-hours. Drone surveying is not a method that ends at the moment of acquisition; when you consider that it delivers value through subsequent verification, organization, explanation, and storage, the scale of this benefit becomes clear.

Benefit 5 of drone surveying: Easy to leverage for pre- and post-construction comparisons and as-built verification

The fifth benefit is that it can be readily used for before-and-after comparisons and as-built verification. On site, management often involves comparing conditions before work begins, progress during construction, and the state after completion. However, if acquisition methods and record formats are inconsistent, making those comparisons becomes difficult. If, for example, previously there were only site photos and this time there are only fragmentary measurement points, it's hard to track changes quantitatively, and explanations to stakeholders tend to become vague.

Drone surveying is a method well suited to time-series comparisons because it makes it easy to repeatedly capture the same area using the same approach. It enables easier areal tracking of pre- and post-construction terrain changes, the progress of excavation and embankment, increases or decreases in temporarily stockpiled soil, and changes in the development extent. As a result, site progress can be assessed more objectively rather than by intuition.

Also, the fact that it readily contributes to earthwork volume management is a major advantage at many sites. Because earthwork quantities are closely related to construction planning, scheduling, inbound and outbound transport, and cost control, it is important to be able to grasp deviations from current conditions as early as possible. Three-dimensional data obtained from drone surveying is easily applied to terrain comparisons and volume estimation, and can be used to speed up construction management. Because it is possible to capture finer detail across a wider area at once than with conventional methods, it is also advantageous that points of change are easier to detect.

From the perspective of as-built verification, aerial viewpoints and three-dimensional information are effective. They make it easier to see shapes and the continuity of surfaces that are hard to view from the ground, the alignment with surrounding elements, and the overall balance of the construction area. Of course, the final confirmation should use methods appropriate to the required accuracy and management standards, but by combining drone surveying you can more quickly narrow down where to focus attention and what needs additional checking. In other words, rather than replacing everything, it helps streamline the preliminary stages of inspection.

Furthermore, having easily comparable data makes it easier to build a shared understanding on-site. There are many situations where it is faster to share actual collected data to show whether progress is behind schedule, proceeding as planned, or where discrepancies lie, rather than explaining them only with drawings and words. Making it easy to compare conditions before and after construction is not only convenient as a record but also offers significant benefits in speeding up decision-making on-site.

Drone surveying benefit 6: Faster sharing with stakeholders, enabling quicker decision-making

The sixth benefit is that sharing with stakeholders becomes faster, making it easier to advance decision-making. The results of surveys and site condition checks are not sufficient if only the person who collected them understands them. Only when multiple parties — the site representative, construction management staff, design staff, partner companies, the client, and maintenance personnel — can grasp the same situation does it become easier to make the next decisions.

Traditionally, the workflow centered on the person who inspected the site organizing photos, reflecting them onto drawings as needed, and verbally explaining them in meetings and reports. This method is by no means bad, but it tends to depend on the inspector’s perspective and the amount of information they provide, and it can take time before the information is fully conveyed. In particular, at large sites or sites with significant elevation differences, it is difficult to share the situation with words alone, and discrepancies in understanding are likely to occur.

Orthophotos and 3D data acquired by drone surveying are easy to share visually, so they help reduce the effort required for explanations. When stakeholders can view the same screen to confirm where work is progressing, where issues exist, and how the site relates to the surrounding terrain, discussions move forward more quickly. This speeds up review meetings and internal coordination, making it easier to take the next steps.

Also, fast sharing does not simply mean shorter meetings. The value is in reducing the number of back-and-forth exchanges required to reach a decision. When materials are hard to understand, exchanges increase—requests for additional photos, re-explanations, re-visits, and checks from different angles. By using drone surveys to capture the current situation across the site and organizing and sharing those results, you can convey more in the initial explanation, making it easier to reduce the number of follow-up confirmations.

On-site operations often spend more time on subsequent adjustments than on the measuring itself. Precisely for that reason, being able to produce easily shareable outputs from the start results in significant efficiency gains. The strength of drone surveying is not only in data acquisition but also in how easily that data can be converted into formats that are readily usable as decision-making material. This is an especially large benefit for sites with many stakeholders and for projects that require remote verification.

Key considerations for maximizing the benefits of drone surveying

We've covered the benefits of drone surveying so far, but to achieve sufficient results on site there are a few points to keep in mind. The most important is not to treat drone surveying as an all-purpose method. It excels at capturing an area-wide view from above, but there are situations—such as verifying fine details that require direct contact or locations affected by obstructions—where other methods are more suitable. In other words, rather than trying to replace everything, consider where using drones within the overall site workflow will most improve efficiency.

Next, it's also important not to stop at acquisition. Even if you go to the trouble of capturing images, without a decided method for organizing them they become difficult to use later. Only when you manage data in a way that anyone can understand and keep it ready for pre- and post-construction comparisons and sharing with stakeholders will efficiency gains appear. If only the person responsible for data acquisition can handle the data, it is unlikely to lead to improvement across the entire site.

Moreover, consistency with ground control and the approach to positional accuracy are indispensable. In practice, whether the position information can be trusted and used on site is more important than visually appealing deliverables. Depending on the task, clarify in advance how much accuracy is required, and, if necessary, combine with ground-based positioning and control point management to help prevent rework. This perspective is especially essential when using the data for as-built verification, checking against design, or earthwork quantity comparisons.

Additionally, flight safety management and pre-flight checks should not be neglected. If you rush to improve efficiency and operate without adequate preparation, re-flights and retakes will occur, actually increasing the required work effort. Organizing factors such as the weather, surrounding environment, flight route, obstacles, and operation time window is, in the end, the quickest way to achieve results. On site, time spent preparing often makes the actual operation easier, and the same applies to drone surveying.

The key to maximizing the benefits of drone surveying is not to make flying itself the goal. By designing, for on-site objectives such as understanding current conditions, construction management, sharing, and record-keeping, what information to capture and how to use it, only then will operational efficiency truly improve.

Summary

The benefits of drone surveying are not simply that it can capture images from the air. It makes it easy to grasp large areas in a short time, allows sites to be run with a small crew, enables non-contact inspection of high or hazardous locations, improves the quality of records through photographs and point clouds, is easy to use for pre- and post-construction comparisons and as-built verification, and enables faster sharing with stakeholders so decisions can be made more quickly. When these six factors combine, the overall work efficiency of the site is dramatically transformed.

Especially in practical work, what matters more than merely shortening the time for surveying tasks alone is how much waste can be eliminated across the subsequent steps—verification, organization, sharing, and re-verification. Drone surveying is a method that particularly facilitates improvement of that entire workflow, which is why many worksites readily perceive benefits from its adoption. On the other hand, if operational design, positional information consistency, and safety management are neglected, the potential advantages will not be fully realized. For that reason, it is important to adopt it appropriately according to the site’s objectives.

If you want to grasp current site conditions more quickly, make before-and-after comparisons easier to understand, and apply acquired data directly to on-site decision-making, it is also important to establish a system that can reliably handle ground-based positional information alongside drone surveying. For example, if you want to carry out coordinate capture, alignment, and integration with photos and point clouds more practically on site, using an iPhone-mounted high-precision GNSS positioning device such as LRTK can make it easier to link site records and positioning smoothly. To turn the benefits of drone surveying into on-site results, having a perspective that treats aerial acquisition and ground-based positioning together will become increasingly important in practice.