Local base station vs Network RTK: Which is best for drone surveys?

Key takeaways

• Local base stations and Network RTK are capable of delivering centimetre-level accuracy when used with a drone.

• Base stations offer operational independence, seamless hardware integration, and reliable performance in areas without mobile data coverage.

• Network RTK removes the need for setting up a base station, making it ideal for large-scale, multi-site operations and rapid deployment.

• Accuracy is comparable between both methods under the right conditions. Each has strengths depending on baseline distance and site environment.

• A hybrid approach, combining owned hardware with a Network RTK subscription, gives professionals maximum flexibility across every project type

• heliguy™ supplies RTK-enabled drones, Emlid GNSS receivers, base stations from DJI, and Premium Positioning Network RTK service.

Local base station vs Network RTK for drone surveys: Quick comparison

The table below provides an at-a-glance comparison between using your own local base stations and Network RTK for drone surveys.

What is a local base station?

A local base station is a GNSS receiver placed at a known, fixed point on the ground. Depending on the site, you may need to establish this control point beforehand.

Correction data is transmitted (typically via radio or cellular link) to a rover in the field (drone), which applies it to achieve centimetre-level positioning accuracy.

Alternatively, you can apply the corrections in post if not using RTK on the drone.

It's a well-established, dependable method that has underpinned professional surveying and geospatial work for decades.

Keep in mind, if you're not sending corrections to the drone in real-time, you can still use a post-processing workflow.

What is Network RTK?

Network RTK achieves the same goal — real-time centimetre-level positioning — but without requiring your own base station hardware.

Instead, it uses a network of continuously operating reference stations (CORS) distributed across a wide geographic area.

These stations continuously calculate GNSS correction data, which is processed centrally and delivered to users over the internet via NTRIP (Networked Transport of RTCM via Internet Protocol).

Your rover or RTK-enabled drone connects to the correction service using a mobile data connection and receives corrections in real time.

These systems model atmospheric conditions across the network and generate highly optimised corrections near your rover location.

The result is a simpler workflow:

• no base station setup

• no additional survey hardware

• faster mobilisation.

• DJI Enterprise equipment

• Emlid GNSS receivers

• other RTK-enabled survey equipment.

The case for a local base station

A base station is a strong choice in a wide range of professional scenarios, and for many operators - whether flying using RTK or processing PPK in the office - it remains the backbone of their positioning workflow.

• Full operational independence: With your own base station, you're not reliant on mobile data coverage if using PPK or a DJI base station.

• Reliable performance in remote locations: Network RTK requires a cellular data connection. In remote or rural environments, mobile signal can be unreliable or absent entirely. A base station removes this dependency, making it the practical choice for work in challenging locations.

• Seamless drone integration: For DJI drone operators, the D-RTK 3 integrates directly with compatible aircraft using LoRa (low-powered radio), while Emlid base stations can broadcast corrections to the drone via Emlid Caster - providing a clean, reliable RTK workflow in either case.

• Emlid NTRIP Caster: The Standard Emlid NTRIP Caster licence is free and lets users connect up to 10 rovers and 5 base stations simultaneously, making it the ideal local base station for a construction site. Your single base station unit could be communicating with a mixture of drones, machine control, and other GNSS devices simultaneously.

• Strong performance on contained sites: On a single, well-defined site, (ie a construction project), a base station placed over a known point delivers accurate, consistent results.

• A long-term asset: Base station hardware is a capital investment that pays for itself over time. For professionals who work regularly and at high frequency, ownership often makes sound financial sense compared to ongoing subscription costs. A local base station can also be taken abroad to use RTK overseas, compared to being tied to an RTK subscription that only works in a specific country.

The case for Network RTK

Network RTK has rapidly become a key part of the drone survey workflow.

It removes several of the logistical challenges associated with base station deployment and delivers consistently strong results across a broad operating area.

• No infrastructure to transport or set up: There's no base station to move between sites, set up, level, or monitor. Your drone or rover connects to Premium Positioning's correction network over mobile data, and you're ready to fly or survey. This simplicity translates directly into faster mobilisation and leaner field operations.

• Ideal for multi-site and high-frequency operations: If you're covering several different sites in a week, the cumulative time spent transporting, setting up, and packing down a base station adds up quickly. Network RTK removes that overhead entirely, letting you focus on the survey itself.

• Single-operator efficiency: Managing a base station alongside a drone operation adds workload. With Network RTK, one person can mobilise quickly, cover large areas, and maintain centimetre-level accuracy throughout — without splitting attention between the base and the aircraft.

Network RTK vs local base stations: Which is the most accurate?

Both Network RTK and local base stations are capable of delivering centimetre-level accuracy. The real difference is not raw precision - it's how and when you can achieve it.

For most drone survey workflows, Network RTK via Premium Positioning is the simplest and fastest route to centimetre-level results. Connect to the correction stream, and you're working at full accuracy with minimal setup and no additional hardware on site.

However, Network RTK has one fundamental dependency: it requires a stable mobile internet connection and coverage from the correction service. In areas where connectivity is poor, patchy, or absent entirely - remote rural sites, upland terrain, or areas with limited signal - that dependency becomes a real operational constraint.

This is where owning your own base station, whether that's an Emlid receiver or a DJI D-RTK 3, provides genuine value.

It takes more time to set up, and it adds equipment to your kit list, but it means that a lack of mobile coverage is never the reason a survey can't be completed to the required accuracy standard. Your correction source is entirely within your control, regardless of what the network is doing.

For professionals who need to work reliably across a variety of sites and conditions, a local base station is less a primary workflow choice and more a dependable fallback, ensuring centimetre-level accuracy is always achievable, whatever the site throws at you.

It's worth noting that GNSS receivers that also have the capability to operate as a base station will provide you with the means to mark GCPs and checkpoints, complementing any survey conducted with Network RTK.

Real-world advice from survey professionals

Experienced surveyors who regularly use both systems tend to agree on one thing: the best setup depends on the project.

Interestingly, many professionals do not rely exclusively on one method. Instead, they use both depending on site conditions, connectivity, project scale, and operational requirements.

Network RTK and local base station: A hybrid approach

A hybrid workflow is common. Many professionals:

• own GNSS receivers which can be used as base stations or rovers.

• subscribe to Network RTK services.

• switch between methods depending on the project.

For example:

• Use Network RTK for day-to-day surveying and drone mapping.

• Deploy a base station in remote locations without mobile coverage.

• Use both together on the same survey. Connect your drone to Premium Positioning via Network RTK while using a receiver, such as an Emlid, to mark GCPs on the ground. If Network RTK connectivity fails, the same receiver can act as a local base station to keep the mission running: this could be using LoRa with the DJI base, or NTRIP Caster or PPK on an Emlid GNSS receiver.

How heliguy™ supports your RTK workflow

heliguy™ provides complete RTK solutions, including RTK-enabled drones, Emlid GNSS receivers (which can also be used as rovers), the DJI D-RTK 3, and Premium Positioning Network RTK.

Summary

The decision between Network RTK and local RTK base stations is not about which technology is better overall.

Both are highly capable professional surveying solutions.

Having your own base station provides independence, reliability, and infrastructure ownership, while Network RTK provides flexibility, faster deployment, and simplified workflows.

For many professionals, the best answer is not choosing one over the other, it is having access to both.

For more information and to get started with local base stations, Network RTK, or both, contact our in-house survey department.