What are the differences between the Static method and the RTK method? A thorough comparison of uses, accuracy, and cost

Table of contents

‐ What is the Static method ‐ What is the RTK method ‐ First, organize the differences between the Static method and the RTK method ‐ Differences in use ‐ Differences in accuracy ‐ Differences in working time and field operations ‐ Differences in cost and implementation burden ‐ Cases suitable for the Static method ‐ Cases suitable for the RTK method ‐ How to choose when in doubt ‐ The idea of combining the Static method and the RTK method ‐ Common field mistakes and countermeasures ‐ Summary

What is the Static method

The Static method is a technique in which a GNSS receiver is set up and left at a known point or a new point for a fixed period to observe, and coordinates are determined by post-processing the recorded observation data. In Japanese this is also called static positioning, and it is widely used in control point surveys and other surveying tasks where high reliability is required.

A defining feature of this method is that the receiver is not moved during the observation and satellite signals are recorded for a relatively extended period. After the observations are complete, baseline analysis is performed while checking the relationship to control points and the quality of the observation data, and the final coordinates are determined. In other words, rather than determining coordinates immediately on site, the approach is to secure observation quality first and then compute precisely afterward.

The reason the Static method is emphasized is that, by securing observation time, it is easier to achieve data redundancy. It helps average out the effects of changes in satellite geometry and temporary reception conditions, and it makes it easier to check the plausibility of results. Therefore it is suitable for work where failure is unacceptable, such as establishing control points and managing reference points for important structures.

On the other hand, because time must be spent waiting while the receiver is set up, it is not suitable for situations where many points over a wide area need to be observed in a short time. It is easiest to understand the Static method as an approach that prioritizes coordinate reliability and verifiability over speed on site.

What is the RTK method

RTK stands for Real-Time Kinematic and is a method of determining the position of a rover in real time using correction information from a base station. In the field, you can place or carry a receiver to the point you want to measure and check high-precision coordinates on the spot.

The appeal of RTK is that results are obtained simultaneously with observations. Instead of observing and taking data back for post-processing, you measure on site, mark the point, verify it, and move to the next point. For this reason it is very useful for tasks that require speed, such as construction surveying, as-built verification, setting out, stakeout of pile centers, and quick site checks.

In RTK, the way correction information is received is important. You can use your own base station or a network-based correction service. In any case, the idea of RTK is to realize the high precision that is difficult to obtain with standalone positioning by using differential information from a base station.

However, because results are produced in real time, RTK is more susceptible to the effects of communication conditions, satellite reception conditions, surrounding obstructions, multipath, and initialization state. Because it is convenient, it is important to understand how to interpret results and how to manage quality.

First, organize the differences between the Static method and the RTK method

The biggest difference between the Static method and the RTK method is the timing of coordinate determination. The Static method derives coordinates by post-processing observations, while the RTK method obtains coordinates nearly simultaneously with observation. This difference directly leads to different operational philosophies.

The Static method is a method of taking time to ensure quality and then calculating precisely afterward. During observation, the receiver is left stationary and data are accumulated. As a result, it is easier to enhance coordinate reliability and to verify results later.

The RTK method proceeds while making real-time judgments. Because points can be obtained instantly on site, it has high work efficiency and is easy to operate with a small crew. However, you must appropriately judge on the spot whether the solution is truly stable, whether it is a fixed solution, and whether observation conditions are good.

In short, the Static method can be described as a “post-processing type that makes it easier to ensure rigor,” while the RTK method is an “immediate-response type that excels in immediacy.” Rather than one being superior, it is more accurate to say that they serve different purposes and should be used accordingly.

Differences in use

Understanding the differences in use makes choosing between the Static method and the RTK method much clearer. In practice, selection is often determined less by what you measure and more by the required quality, workflow, and timing of needed results.

The Static method is suitable for establishing control points and laying the foundation of coordinates. For example, when you want to set up a new control point, accurately define relationships with known points, or prepare management points for long-term use, the reliability of observation results becomes particularly important. In such cases, whether the coordinates can serve as a foundation for future surveys is more important than taking many points quickly. The Static method is precisely suited to this type of foundational work.

On the other hand, RTK is suitable for positioning that moves field work forward. For tasks such as setting out stakes at a construction site, verifying design positions on site, recording as-built positions during construction, and quickly grasping existing conditions, the ability to see coordinates on the spot has great value. Because you can move and acquire points one after another, it directly shortens work time.

RTK also pairs well with single-person operations. For tasks where it is difficult to place multiple people on site, being able to carry a receiver and terminal and confirm coordinates instantly is a major advantage. In contrast, the Static method requires securing observation time, so it is not well suited to efficiently capturing a large number of points.

Thus, if you think of the Static method as surveying that builds the foundation and RTK as surveying that drives field work, the differences in use become clear.

Differences in accuracy

When comparing the Static method and the RTK method, many people are most concerned about accuracy. However, it is important to note that accuracy is not determined simply by which method is better. You must consider required observation conditions, solution stability, and verifiability after the fact.

The Static method generally makes it easier to ensure high reliability. By accumulating observation data for a certain period and then analyzing, the method is less affected by temporary disturbances during observation. Especially because baseline analysis and evaluation of multiple observation conditions can be used to judge results, it is well suited for determining coordinates of critical points. If sufficient observation time is taken and reception conditions are good, a major strength is the ease of confirming reproducibility and plausibility of results.

RTK can also achieve high-precision positioning, but because it produces solutions in real time, it is more affected by observation conditions. In locations with poor sky view, near trees or buildings, in areas with many reflections, or where communication is unstable, it can be difficult to obtain a fixed solution, or values may appear to be measured even though they are not stable. Therefore, in RTK you should not judge only by numerical values; checking the solution status, observation duration, and confirmation by repeated observations is important.

A common misunderstanding is thinking RTK can always produce the same accuracy easily. When conditions are favorable it is very convenient and can provide practically sufficient accuracy, but risk management for deteriorating observation conditions is more important than with the Static method.

Conversely, people may assume the Static method is always safe because more time is taken, but mechanical setup errors, poor management of antenna reference marks, antenna height recording mistakes, or mix-ups of known point information can prevent high accuracy. In other words, regardless of method, adherence to basic observation procedures is a prerequisite.

In practice, the approach is: for control points or points that strongly affect downstream processes, the Static method is advantageous; for quickly observing many points on site, RTK is advantageous. It is important to choose not only on accuracy but on how accuracy will be ensured and verified.

Differences in working time and field operations

Differences in working time are a major factor in choosing between the Static method and the RTK method. The optimal method changes depending on site busyness, crew size, number of points to measure, and whether results are needed the same day.

With the Static method, a fixed observation time is required at each point. It may be completed quickly in some cases, but depending on the desired quality and baseline conditions, sufficient observation time must be secured. Also, even after field observations are finished, the work is not complete; office-based analysis and verification remain. Therefore you need to consider total work time including post-processing as well as on-site time.

RTK allows coordinate acquisition relatively quickly after reaching a point, so it pairs very well with multi-point surveys. Because results can be confirmed on site, decisions about remeasurement can be made immediately. This immediacy is why RTK is valued in construction and construction management. The workflow of observe, confirm, remeasure if necessary, and move on is easy to implement, shortening overall scheduling.

However, the speed advantage of RTK comes with the risk that work can stall if communication or satellite reception is unstable. If fixed solutions cannot be obtained, communications drop, or values fail to stabilize due to the surrounding environment, work may actually take longer. Thus under normal conditions RTK is faster, but in poor conditions efficiency gains may not materialize.

The Static method lacks real-time capability, but actually establishing an observation is relatively simple: properly set up the receiver, secure the required time, and then refine quality during data analysis. There is less immediate decision-making on site, but it suits planned surveying.

From a field-operation perspective, the Static method is planned-oriented and RTK is responsive-oriented. Which is more efficient must be judged in the context of site conditions and the entire workflow rather than raw speed alone.

Differences in cost and implementation burden

When comparing the Static method and RTK, cost should be considered not only in terms of equipment price but also the operational effort and systems required. Even without detailing exact prices here, we can outline where burdens are likely to occur.

Because the Static method assumes post-processing, knowledge and time for post-processing are required. In other words, you give up immediacy on site but must absorb data organization and analysis processes in-house. While the equipment configuration itself can be relatively simple, data management, analysis procedures, and a result-checking system are necessary, so personnel costs and training costs are not negligible.

RTK offers immediate results on site but requires a system to receive correction information stably. Operational burden varies depending on whether you use your own base station or external correction services. In addition, ensuring communication environments, connection settings, initialization procedures, and methods for confirming fixed solutions require understanding specific to real-time operations. So while analysis burden is reduced, building a reliable field operation system becomes important.

Also, consider staff movement when thinking about cost. The Static method tends to incur waiting time and post-processing, so jobs with many points increase time burdens. RTK is easier to operate with one person and is efficient for multi-point surveys, which can be advantageous for labor costs and on-site man-hours. Judging by equipment type alone can lead to misjudging actual operational burden.

Beginners tend to compare only device performance, but differences in practice come from overall operation. For the Static method, can you run post-processing in-house? For RTK, can you operate stably on site? Considering these questions may lead to different conclusions than apparent implementation difficulty.

Cases suitable for the Static method

The Static method is suitable when you want to properly establish control coordinates. If the coordinates of points that form the basis of surveying are ambiguous, no matter how efficiently you measure later, overall quality will not improve. When defining long-term control points or management points that become the basis for downstream work, the Static method is effective.

It is also appropriate when you want to carefully verify plausibility afterward. For example, when you want to reconcile relationships among multiple points, minimize the influence of observation conditions, or make it easier to explain results, the strengths of a post-processing approach come through. Even if results take some time, many tasks prefer a method that allows easy recheck.

In places where communication is unstable, the Static method is often a viable choice. Where RTK cannot reliably receive correction information, the Static approach of recording observation data for later processing is an option. Of course, if reception conditions are extremely poor, that is a different problem, but at least dependence on real-time communications is reduced.

Additionally, organizations where experienced personnel can create solid observation plans tend to leverage the Static method well. If you can plan observations, process data, and manage quality in a systematic workflow, the Static method becomes a very robust approach.

Cases suitable for the RTK method

RTK shines where on-site decisions are required. At a construction site, if you must confirm positions while work progresses, waiting for post-processing results later may be too slow. In such cases, RTK’s ability to confirm coordinates in real time is overwhelmingly convenient.

RTK is especially advantageous when many points must be measured in a short time. For tasks like existing-condition surveys, as-built checks, and verifying construction positions, the more points there are the more valuable it is to shorten observation time per point. Being able to measure, verify on the spot, and remeasure if needed reduces rework.

RTK also suits small-crew operations. Even where multiple people were traditionally required to set up and log survey instruments, combining RTK with a mobile device allows a single person to progress from observation to verification. This is important on sites with labor shortages.

Furthermore, RTK is convenient when you need to compare plans with field conditions or quickly grasp positional relationships. In construction management and maintenance, not only is establishing absolute control important, but speed of daily decision-making matters. In that sense RTK has great value as a method to keep sites moving.

How to choose when in doubt

When in doubt between the Static method and RTK, start by asking “when are the results needed?” If you need results the same day or on the spot, RTK is a strong candidate. If results can wait until the next day or later and establishing a reliable baseline is the priority, the Static method is more suitable.

Next, consider whether the point will be a control point or a point for field work. If it will serve as the foundation for future surveys, it is worth taking the time to determine it carefully with the Static method. Conversely, if the point is needed for on-site verification or to advance construction, RTK’s immediacy is a major advantage.

Also consider the number of observation points. If there are few points and each is critically important, the Static method may be more reassuring. If there are many points and efficiency is key, RTK is realistic. Trying to perform all multi-point surveys with the Static method can overload both fieldwork and post-processing.

Do not forget to evaluate communication environment and sky view. RTK is very convenient when conditions are favorable, but in areas with unstable communication or heavy obstructions, operations may not proceed as expected. In such places, consider the Static method or incorporate alternative observation plans.

Ultimately, choose based on the work objective, not the name of the technique. The Static method is for carefully producing coordinates; RTK is for quickly moving field work. Keeping this principle in mind will reduce poor choices.

The idea of combining the Static method and the RTK method

In practice, it is not always the case that one method alone suffices. In many cases it is more rational to combine both.

A typical workflow is to first establish reliable control points using the Static method, and then perform multi-point observations with RTK based on that control. This secures a solid foundation for the survey while improving day-to-day efficiency. Because the needs for foundation building and actual field work differ, there is no need to unify methods.

For example, at the start of a new site, establishing control and management points is important; in this phase, a solid Static approach is effective. Then for construction checks and routine point acquisition, it makes sense to operate mainly with RTK.

You can also recheck important points measured by RTK on another day or reinforce them with the Static method when necessary. This is effective from a quality-control perspective. While real-time positioning is convenient, it is reassuring to confirm important points with different methods.

Beginners may think they have to choose one method, but thinking in terms of role division is important. Use the Static method for control establishment and RTK for daily operations—this approach is very practical on site.

Common field mistakes and countermeasures

For both the Static method and RTK, many causes of degraded accuracy stem more from lapses in basic procedures than from advanced theory. Understanding the differences between methods is important, but it is equally important to maintain basic observation practices.

Common mistakes with the Static method include insufficient observation time, antenna-height recording errors, poor setup, and inadequate confirmation of known point information. Even though the receiver is left stationary, an initial setting error can easily skew results. Because this is a post-processing method, vague on-site records can be irretrievable during analysis. As countermeasures, thoroughly check records before and after observation and always document instrument setup conditions with photos and forms.

Common RTK mistakes include finalizing points without sufficiently confirming whether a fixed solution has been obtained. If you trust values just because numbers are displayed, low-quality points can contaminate results. Observing near buildings or trees and underestimating the effects of reflections and obstructions is also common. Countermeasures include checking the solution status for each point, waiting briefly and reobserving if necessary, and reconsidering observation locations in areas with strong environmental effects.

A mistake common to both is choosing a method that does not match the objective. Relying solely on RTK to speed up control point creation, or insisting on the Static method for a multi-point job and overburdening the workflow, are examples where the choice itself becomes inefficient. Knowing the method is more important than just learning how to operate the equipment.

Summary

If you summarize the differences between the Static method and the RTK method in one sentence: the Static method is a way to ensure accuracy and reliability through time-consuming post-processing, while the RTK method is a way to perform high-precision positioning on site in real time using correction information. Both are important GNSS surveying techniques, but they excel in different situations.

If you want to carefully determine coordinates that serve as control or management points for the survey as a whole, the Static method is suitable. If you want to quickly acquire points on site and efficiently proceed with construction or verification tasks, RTK is suitable. In other words, the criterion for choice should be the work objective and site conditions rather than the technique name.

In practice, it is more rational to view the two methods as complementary roles rather than opposing choices. Secure control points reliably and run field operations efficiently—this approach makes it easier to balance accuracy and productivity.

In recent years, the barrier to adopting high-precision positioning has itself changed. Where specialized equipment and operations were once prerequisites, today high-precision positioning can be started more accessibly by combining with smartphones. If you are considering on-site position checks, simple surveys, or improving daily construction management efficiency, looking into smartphone-compatible high-precision positioning systems is useful.

In particular, solutions like LRTK that can be attached to an iPhone to utilize high-precision GNSS are a good option for those who want to make RTK more usable on site. While traditional approaches remain important for strictly handling control points, if your daily needs are “I want to measure immediately,” “I want to confirm on the spot,” or “I want something easy to operate alone,” starting with a smartphone-linked high-precision positioning device can be a practical first step in GNSS utilization.