10 Things You Can Do with Drone Surveying

Table of Contents

• What drone surveying is

• What you can do with drone surveying 1: Rapidly understand the current conditions of a wide area

• What you can do with drone surveying 2: Create orthophotos

• What you can do with drone surveying 3: Visualize terrain undulations and elevation differences

• What you can do with drone surveying 4: Grasp earthwork volumes

• What you can do with drone surveying 5: Check the condition of slopes and embankments

• What you can do with drone surveying 6: Record construction progress at fixed points

• What you can do with drone surveying 7: Assess conditions during disasters and emergencies

• What you can do with drone surveying 8: Safely inspect areas that are difficult for people to access

• What you can do with drone surveying 9: Acquire source data for point clouds and 3D models

• What you can do with drone surveying 10: Produce deliverables that are easy to share among stakeholders

• Key points to keep in mind to make the most of drone surveying

• Summary

What drone surveying is

Drone surveying is a method that uses cameras and various sensors mounted on an aircraft-capable platform to measure the ground and structures from the air, leading to an understanding of current conditions and the creation of surveying deliverables. Compared to traditional ground surveying, a major feature is that it makes it easy to survey a wide area at once and to gather information in places with poor footing or where entry requires caution.

When practitioners search for “drone surveying,” their intent is not merely to know whether aerial photography is possible but to understand which actual tasks it can be applied to, which ground-based tasks it can replace, and to what extent the deliverables are useful. Simply taking photos on site is meaningless. Only when drone surveying is connected to concrete tasks—pre-construction condition checks, progress management during construction, as-built examination, earthwork volume assessment, preparation of explanatory materials for stakeholders, and so on—does its introduction show tangible benefits.

Drone surveying is not万能. In areas where trees are dense and the ground is hard to see, where there are strict constraints on airspace or safety management, or in situations that require highly precise positioning of fine details, combining ground measurements or other measurement methods is indispensable. Therefore, it is important to broadly understand what drone surveying can do and to organize which uses it is suitable for and which uses require supplementation.

Here, we organize what drone surveying can actually do into 10 items. This is not merely a feature introduction; from a practical viewpoint, we explain how it helps on site and in what situations it tends to be effective.

What you can do with drone surveying 1: Rapidly understand the current conditions of a wide area

One of the first advantages of drone surveying is that it allows rapid understanding of the current conditions of a wide area. When confirming conditions by walking the site, more time and people are required as the target area expands. Especially for planned development sites, river surroundings, slopes, material yards, temporary yards, farmland, and mountainous areas, it can take considerable effort to grasp the overall picture.

By contrast, drone surveying captures the current conditions as a surface from above, making it easy to check the overall shape of the site, usage conditions, locations of obstacles, delivery routes, and the extent of work yards at once. It is useful not only for desk-based reviews before entering the site but also as material for organizing pre-construction conditions and for initial meetings.

The value of understanding current conditions is not only speed. Elevation differences and positional relationships with the surroundings, which are easy to overlook from ground level, become easier to grasp from an aerial perspective. For example, connection conditions to adjacent roads, directions where drainage tends to collect, space available for temporary facilities, and clearances from existing structures—elements you want to check during planning—are strengths of the bird’s-eye view because they can be seen in a listable form.

Being able to comprehend a wide area quickly also helps when comparing multiple options. When considering where to route work lines, where to place temporary storage, or from which location to start construction, having an overview makes decision-making easier. Experienced site personnel understand the importance of whole-site optimization rather than local optimization, and drone surveying is a method that readily produces the data for such decisions.

Of course, it does not replace tasks that require careful ground verification such as checking detailed dimensions or confirming boundaries. However, for the role of quickly and broadly understanding site conditions, drone surveying is highly compatible and its benefits are easily felt.

What you can do with drone surveying 2: Create orthophotos

One of the representative deliverables of drone surveying is the orthophoto. An orthophoto is an image in which the distortion of photos taken from the air has been corrected so that it can be treated like a plan view. Unlike simple aerial photos, orthophotos make it easier to organize positional relationships and are well suited for site records and explanatory materials.

Orthophotos are useful in many situations. For example, keeping one as a pre-construction record makes it easier to confirm later what was located where. During construction, they make it easier to share the placement of temporary structures, conditions of material yards, and progress of the construction area. After completion, orthophotos can be used as visual records of the overall condition at the time of completion.

In practice, a particularly convenient aspect is that they make explanations to stakeholders easier. Content that is hard to convey with drawings alone becomes easier to understand for people unfamiliar with the site when using orthophotos. Clients, subcontractors, site managers, and designers—all stakeholders with different perspectives—can align their understanding while looking at the same image, improving meeting efficiency.

Another major advantage is that orthophotos can be used as auxiliary material to reduce the number of on-site surveys. While final decisions sometimes need to be made on site, having an orthophoto at the pre-review stage allows you to narrow down the locations to check in the field. As a result, scheduling surveys becomes easier and unnecessary trips can be reduced.

However, do not over-rely on orthophotos. Areas that cannot be seen from above, such as under trees or behind structures, cannot be captured, and height information may not be sufficiently deduced from images alone. Therefore, position orthophotos as strong materials for planar understanding and combine them with ground confirmation or other measurement results as necessary.

What you can do with drone surveying 3: Visualize terrain undulations and elevation differences

Drone surveying is also powerful for visualizing terrain undulations and elevation differences. It makes it easier to understand in three dimensions the steepness of slopes that are hard to read from plan photos, the shape of valleys and ridges, the condition of fills and cuts, depressions, and directions where water is likely to flow.

On development sites and earthwork sites, judging terrain by appearance alone can lead to differences in perception. Even if walking the site gives an intuitive understanding, it is not easy to share that information accurately with other stakeholders. If terrain is visualized using data obtained from drone surveying, the trends of undulation and distribution of elevation differences can be grasped objectively.

This visualization is useful in both planning and construction stages. During planning, it serves as material for earthwork planning, drainage planning, and temporary road routing. During construction, it becomes easier to understand terrain changes after excavation or filling and to confirm the extent of work. The ability to follow how the terrain changes over time with progress is also useful.

Visualizing elevation differences also contributes to safety. If you can identify steep slopes, large steps, and low-lying areas where water is likely to collect, you can more easily share points of caution before work starts. Understanding terrain is essential when considering movement routes on site and heavy equipment access routes.

On the other hand, this assumes the ground surface is sufficiently visible; in places with dense vegetation or where structures are clustered, there may be limits to terrain understanding. In such cases, supplementing with ground measurements for the necessary areas or changing the objective from terrain understanding to current condition recording may be required. Using drone surveying with a clear understanding of what can be seen leads to higher-precision operation.

What you can do with drone surveying 4: Grasp earthwork volumes

Among what drone surveying can do, grasping earthwork volumes is a highly practical and valuable use. It makes it easier to determine the quantities of fills and cuts, the volume of temporarily stored soil, and the progress of import/export, so it is particularly useful on sites involving earthworks.

Earthwork volumes form the basis for various decisions: construction planning, schedule management, progress tracking, and import/export management. However, when the target area is wide or shapes are complex, frequently checking them with conventional methods alone is laborious. If you obtain terrain data periodically with drone surveying, you can readily capture the ground surface at a given time and compare it to previous data to confirm changes.

What matters in this use is not merely producing quantities but being able to track changes. For example, confirming whether filling is proceeding according to plan, whether excavations are unbalanced, or whether temporary soil volumes are increasing or decreasing—continuously checking these with the same approach enhances site management accuracy. The major advantage is moving away from intuition-based management toward having a consistent basis for understanding the situation.

Grasping earthwork volumes also helps unify understanding among stakeholders. Discussions about quantities are prone to discrepancies if based solely on verbal explanations, and differences in perception often arise between the field and management. If discussions are based on results from drone surveying, it’s easier to clarify which area is being targeted and which time points are being compared.

However, earthwork calculations are influenced by input conditions and the choice of reference surfaces, so aligning operational rules is indispensable. If definitions of measurement timing and target area are ambiguous for each site, continuous management loses its meaning. If drone surveying is used for earthwork volume tracking, decide when, where, and under what conditions data will be acquired, and operate with the perspective of maintaining comparable data.

What you can do with drone surveying 5: Check the condition of slopes and embankments

Checking the condition of slopes and embankments is another representative use where drone surveying is effective. Slopes cover large areas, are inclined, and can be difficult for people to approach in some places, so even understanding the overall condition requires effort. Drone surveying, which allows aerial inspection, is well suited to these targets.

You can more easily survey over a wide area to see where deformations are occurring on slopes, the state of vegetation, whether surface protection is uneven, and whether there are spots where drainage flow seems problematic. For embankments, it provides material to assess surface deterioration, conditions at the crest and toe, and areas where water is likely to accumulate.

On site, it is important not to view only concerning spots as points but to compare them within the whole. Drone surveying records the entire area at the same time, making it easier to capture conditions as surfaces rather than points. Keeping this as auxiliary material for inspections and patrols makes it easier to find differences from previous records.

Also, the condition of slopes and embankments can change over time, not only immediately after construction. Recording the same location continuously—after rain, after seasonal changes, or after a period of time—makes it easier to notice small changes. Especially for early detection of deformations and accumulation of inspection records, drone surveying is effective.

However, drone surveying cannot reveal internal conditions invisible from the surface, and close visual inspection or ground confirmation may be necessary to reliably check fine cracks or localized damage. Thus, it is realistic to use drone surveying as a means to efficiently inspect slopes and embankments broadly, while conducting detailed diagnostics separately.

What you can do with drone surveying 6: Record construction progress at fixed points

Recording construction progress at fixed points is another very practical use of drone surveying. If you shoot not only at milestones such as pre-construction, during construction, and completion, but also at regular intervals—weekly or monthly—you can more easily track site changes. Progress management is fundamental to site operations, but because many aspects are hard to convey in text or speech, the value of visual records is high.

For example, it becomes easier to compare how far development has progressed, how temporary roads have changed, how material yards have moved, and how filling or excavation has advanced when photographed from above under similar conditions. Site managers or stakeholders who are not on site every day can more easily understand the situation.

Progress records are useful not only for reporting. They also serve as material for reviewing schedule-related issues. It becomes easier to see when work stalled, where material and equipment placement was wasteful, and which areas had congested movement lines. Fixed-point records are also useful for considering improvements after completion.

Another strong point is that they are easy to use for client explanations and internal reporting. Materials that show an overview of the site are easy to understand and increase the persuasiveness of progress explanations. Drone surveying records are particularly valuable for large sites or staged construction sites where changes are hard to grasp from ground photos alone.

However, when using fixed-point records, it is important to keep flight conditions and shooting areas as consistent as possible. If conditions vary, comparison becomes difficult and the value as a record declines. When using drone surveying for progress management, establish rules for shooting timing, coverage, altitude, and orientation so the records are useful when reviewed later.

What you can do with drone surveying 7: Assess conditions during disasters and emergencies

Assessing conditions during disasters and emergencies is another situation where drone surveying is useful. When heavy rain, landslides, ground deformations, flooding, or road damage occur, and places are dangerous for people to approach immediately, it is important to first understand the overall situation from a safe position. Drone surveying is effective as an aid for that initial assessment.

From above you can grasp the extent of damage, accessible routes, places at risk of secondary disasters, and relationships with surrounding terrain. Aerial perspective is especially helpful where ground-level visibility is limited or where areas cannot be seen without going around.

In emergencies, you need to share information not only with people on site but also with distant managers and related agencies. Having images and situation records from drone surveying makes it easier to share decision-making materials. Overall aerial information is crucial when considering recovery priorities, entry restriction ranges, and emergency response policies.

Drone surveying can also be used for post-disaster follow-up observation. After emergency responses, continuing to record the same locations to check whether conditions have stabilized, whether changes occur after each rain, or whether temporary repairs show anomalies has meaning. The ability to track changes over time rather than perform one-off checks is practical.

However, safety management and flight decisions are even more important in emergencies than in normal times. Avoid reckless flights when weather conditions are unstable or surrounding conditions are not fully understood. Drone surveying is useful for initial checks of dangerous areas, but it must be used with an assessment of site conditions so it does not create new risks.

What you can do with drone surveying 8: Safely inspect areas that are difficult for people to access

A big value of drone surveying is that it makes it easier to safely inspect places that are difficult for people to access. On steep slopes, muddy areas, water edges, spots with poor footing, or areas with widespread obstacles, ground inspections involve both time and risk. With drone surveying, you can understand the situation without forcing people to get close.

On site, the places you want to check are not always safely walkable, and the points of interest are often scattered rather than in a single spot. Moving around to check from the ground each time is inefficient and burdensome for workers. Drone surveying enables continuous inspection over a wide area, reducing movement burden and risk.

This safety improvement also enhances site productivity. If less time is spent checking dangerous spots, personnel can devote more time to necessary decisions and next steps. Using drone surveying as a pre-entry check makes it easier to determine which route allows safe approach, improving the safety of on-site surveys.

It also helps reduce the workload of routine inspections. Instead of having people enter all areas every time, first inspect the entire site with drone surveying and then focus close inspections on locations that appear abnormal, improving inspection efficiency. Increasing the number of places that do not require human entry contributes to both safety and efficiency.

Of course, final detailed inspections or checks involving physical contact sometimes can only be done on the ground. Nevertheless, reducing human entry in the initial assessment and overall understanding stages is itself a major advantage of drone surveying. The value is higher on sites that prioritize safety.

What you can do with drone surveying 9: Acquire source data for point clouds and 3D models

Drone surveying can also acquire source data for point clouds and 3D models. This is useful when you want to understand the site not only planimetrically but also in three dimensions. It is applicable when a three-dimensional understanding is needed—terrain undulations of development sites, shapes of embankments, terrain around structures, and consideration of temporary plans.

The value of three-dimensional data is not only that it is visually easy to understand. It makes it easier to share spatial positional relationships and align assumptions for discussion. Elevation differences and depth that are hard to convey with drawings alone become easier to grasp when understood three-dimensionally. It is especially effective when explaining to stakeholders who are not familiar with the site.

Another advantage is that it is easy to use for pre- and post-construction comparisons. It becomes simpler to track which parts changed, how fill progressed, and how shapes changed due to excavation. From the perspectives of construction management and records, preserving source data has significant value.

However, acquiring three-dimensional data does not automatically make everything clear. It is necessary to clarify what decisions the data will support. Required precision and presentation methods vary depending on whether the purpose is planning review, preparation of explanatory materials, or progress comparison. If you accumulate data without a clear purpose, it becomes difficult to use in practice.

Therefore, when handling three-dimensional data in drone surveying, it is important to organize which operational decision the deliverable will serve before focusing on the output format. Doing so makes it easier to use the data effectively as the information needed on site.

What you can do with drone surveying 10: Produce deliverables that are easy to share among stakeholders

Drone surveying is also well suited to producing deliverables that are easy to share among stakeholders. In practice, it is not sufficient for only site personnel to understand the situation. It is important that clients, designers, managers, subcontractors, and internal decision-makers—all kinds of stakeholders—can share the same understanding.

In that respect, images and organized surveying deliverables obtained from above function well as a common language. Content that tends to be misinterpreted with drawings or text alone becomes easier to align when visual information is added. Deliverables that convey the overall picture in a single image are especially valuable in interactions with stakeholders who cannot visit the site.

Deliverables that are easy to share also affect decision-making speed. If current conditions are easily conveyed, back-and-forth for additional checks is reduced and decisions can proceed. This has effects in many situations: schedule adjustments, reconsideration of construction scope, sharing safety measures, and explaining responses to the surroundings.

The high degree of recordability should also not be overlooked. When deliverables enable most viewers to reach a similar recognition, they are useful for later review of the process. If you organize and preserve pre-construction conditions, changes during construction, and conditions at completion, you can raise the quality of handovers and reports.

Thus, drone surveying is not just a measurement method but also a means of converting site information into forms that can be shared. Thinking of it not as something that ends within the site but as a mechanism to align the recognition of all stakeholders further expands its range of use.

Key points to keep in mind to make the most of drone surveying

So far it may look like drone surveying is a versatile and convenient method, but there are points to keep in mind to make it effective in practice. First and foremost, drone surveying demonstrates strengths when it matches the purpose. It is well suited to broad-area understanding, aerial recording, and visualization of terrain and progress, but it has limits in precise detail checks and in capturing parts not visible from above.

Next, evaluating site conditions is important. In places with many trees, dense buildings, strong wind influences, or strict safety considerations for the surroundings, you may not obtain the expected results. Before introduction, confirm not only what you want to acquire but also whether the site environment makes that achievable.

It is also essential to clarify how you will use the deliverables. Acquisition and organization methods differ depending on whether you will use the data for current condition checks, earthwork volume calculations, or progress sharing. Flying with an unclear purpose tends to result in data that exists but is hard to use in practice. Deciding in advance what decisions the data will support helps prevent failure.

Additionally, avoid trying to complete everything with drone surveying alone. On site, there will always be situations that require other methods: ground confirmation, as-built control, setting-out, and coordinate checks. It is realistic to view drone surveying as a way to complement those methods and improve overall efficiency. Organizing what to replace and what to retain will greatly affect the benefits of introduction.

For practitioners, what matters is not the novelty of the technology but whether it is usable on site. When introducing drone surveying, do not judge based only on how much it can do—start with uses that will truly help your company’s sites, and that will lead to success.

Summary

What drone surveying can do ranges widely: broad-area current condition understanding, creation of orthophotos, visualization of terrain and elevation differences, earthwork volume assessment, slope and embankment inspection, progress recording, disaster condition assessment, safe inspection of hard-to-access areas, acquisition of source data for 3D models, and preparation of materials for stakeholder sharing. Its essential value is not merely aerial photography but visualizing the site, making decisions easier, and facilitating sharing.

At the same time, it is not万能 for parts that cannot be seen from above or for highly detailed position checks. For that reason, it is important to clarify intended uses and combine drone surveying with ground measurements and confirmations. To achieve results in practice, you need not only to know the list of capabilities but also to find the uses that directly tie to your company’s operations.

If you want to expand drone surveying into a more practical operation by combining aerial current condition and terrain information with on-the-ground position checks and supplemental positioning, pay attention to the ground-side positioning environment as well. For example, if you want to streamline on-site position identification and verification, combining drone surveying with an iPhone-mounted GNSS high-precision positioning device such as LRTK can help connect aerial observations with ground verification. Thinking about how to improve surveying operations across the whole site, rather than trying to complete everything with drone surveying alone, will become increasingly important in practical work going forward.