GNSS workflows for any construction team that cut your costs

Accuracy is critical in construction: tolerances are tight, and mistakes are expensive to fix. That’s why many projects slow down because crews have to wait for a professional surveyor to arrive and do the job accurately.

This can create a false choice: wait while people and machines sit idle, or keep moving and risk losing accuracy and accountability.

In fact, today, construction teams don’t need to replace surveyors. Instead, they can handle simple tasks in-house and bring in surveyors for complex work. With modern GNSS tools, field crews can take care of routine layout, checks, and documentation. All reducing delays, speeding up workflows, and improving ROI.

Why does relying on surveyors for every task slow projects down?

Surveyors are essential on construction sites. They set control, verify boundaries, and handle high-risk measurements that really can’t go wrong. 

The problem starts when they’re treated as a general-purpose resource for every positioning task. That’s when things begin to slow down:

• Idle machines and crews: expensive equipment as excavators, dozers (and their operators) ends up waiting. In many cases, a simple grade check costs more in downtime than the measurement itself.
• Schedules built around availability, not readiness: work gets delayed, not because crews or materials aren’t ready, but because the surveyor isn’t available yet.
• Errors discovered too late: when checks happen without a frequency, mistakes can be found only after the work is done.

But what if most of these tasks don’t need to be done by highly trained surveyors? 

Even if you wait for the professional to get on the field, they will be spending time on routine checks instead of focusing on what actually requires their expertise. The most efficient construction teams use surveyors strategically, keeping them focused on critical tasks. 

Can non-surveyors really collect accurate GNSS data?

Yes, when the workflow is designed for it. Modern GNSS systems make it possible for non-surveyors to collect centimeter-level accurate data reliably, without guesswork or deep surveying expertise. 

When a GNSS receiver is connected to a CORS network or a local base station, it delivers survey-grade RTK positioning. 

Field apps guide users through setup and calibration, enforce best practices, and immediately flag issues like poor residuals or unstable solutions. This prevents most of the common mistakes before they affect the data.

That’s the technology. Now let’s look at how it works on real construction sites.

Matt Kippelen, Digital Innovation Manager at Menard, USA, shared how switching to Emlid GNSS didn’t just change their workflows: it changed who could confidently perform survey-related tasks on site. 

“We were users of another manufacturer, and we still have about 15 or 20 units in circulation. But we’re now discussing pulling those out of service to avoid running a mixed fleet—because there’s a general consensus that people prefer using Emlid.

The product is impressive and very user-friendly. It’s easy to train new engineers on, which matters for us because our use case is a bit different. We’re a construction company using Emlid to survey points on active job sites, and the users are field engineers—often younger people who are early in their careers. It’s not seasoned surveyors with decades of experience. That’s just not how our teams work.”

Matt Kippelen

What survey jobs can be done with GNSS?

Modern GNSS puts survey-grade accuracy directly in the hands of construction teams. With guided workflows and built-in checks, crews can handle layout, verification, and documentation themselves, without cutting corners.

The key isn’t doing everything in-house. It’s knowing which tasks you can safely own, and when a licensed surveyor still needs to step in. 

Below are the GNSS tasks construction teams can confidently handle on their own.

Grading & Cut/Fill verification without stopping production

In earthworks and construction, grade verification often turns into a bottleneck. Work slows down (or stops entirely) while crews wait for a surveyor to confirm the grade. 

When it isn’t available right away, the team is forced to rely on visual estimates. That’s risky: over-excavation is a common result, and fixing it means backfilling, compaction, and rework. The cost? Time and money.

A GNSS-based workflow changes that. With Emlid Reach receivers, grade verification becomes a real-time part of production, and design surfaces (DTMs) are uploaded to a simple Emlid Flow field app on a rugged smartphone or tablet. This way, crews can check grades as they work, without stopping the job.

When a GNSS rover pole is placed on the ground, the Emlid Flow app instantly shows the difference between the actual elevation and the design grade. 

Crews can verify grades without stopping the machine or leaving the work area, operators or foremen can check the quality of the work on the spot and make adjustments immediately.

This real-time feedback brings clear advantages:

• Errors are fixed right away, before they turn into costly rework.
• Machines stay productive longer, improving the return on investment for heavy equipment.
• Progress to final grade is faster, helping projects stay on schedule.

QA/QC verification before mistakes become permanent

In many construction projects, issues such as missing sleeves, misaligned anchor bolts, or flawed formwork become visible only after the concrete has set.

By then, crews may need to cut through cured concrete, re-pour, or redesign around the missed elements. And here we have another surveyor bottleneck. 

When crews rely on their availability to verify work, checks can be infrequent or rushed, and important details are missed. As a workaround, teams turn to real-time or static reports to resolve uncertainties. Common consequences include missed or misplaced sleeves or misaligned anchor bolts.

Let’s think about it in practice: with the Reach receivers and Emlid Flow 360, you can integrate high-accuracy positioning directly into the field verification process. Instead of working from abstract plans, CAD drawings are imported as georeferenced background maps, providing a live, contextual reference. 

This allows construction professionals, particularly superintendents, to see building lines and design features directly overlaid on their position on the job site.

This shifts QA/QC from spot-checking points to verifying the whole layout in context. Before a concrete pour, superintendents can walk the site with Emlid’s GNSS receiver and the Emlid Flow app to catch issues early, while fixes are still easy.

They can:

• Stake out and verify sleeves against the digital design to ensure correct placement, orientation, and diameter.
• Check anchor bolt locations and elevations to guarantee they match the exact requirements for the steel connection, preventing delays during the erection phase.
• Confirm the alignment and elevation of formwork to ensure the poured concrete will cure to the precise dimensions and plumb required by the structural plans.

GNSS flips QA/QC from fixing problems after the fact to catching them before they happen. The results are straightforward:

• Catching issues before they become fixed: resolving errors in sleeves or anchors when they are still temporary fixtures (e.g., rebar cage placement or form stops) rather than permanent, cured concrete elements.
• Provides objective, location-based proof: GNSS captures highly accurate coordinates, offering measurable evidence of a feature’s position relative to the design model.
• Reduces downstream delays and change orders: Eliminating early errors cuts expensive rework, minimizes schedule disruptions, and reduces costly change orders.

Related reading: See how modern GNSS hardware is designed for large-scale construction environments, from ruggedization to multi-crew deployment

With cloud tools like Emlid Flow 360, managers don’t need to be everywhere at once. Every point, stake, and accuracy check is logged automatically, creating a clear audit trail that can be reviewed remotely.

That means better oversight, fewer site visits, and tighter control over quality—without slowing the job down. The result is simpler coordination and much better use of time and resources:

• Projects start faster because the layout no longer depends on someone else’s schedule. 
• Teams rely less on surveying sub-contractors for simple tasks.
• Licensed surveyors stay focused on the work that actually requires their expertise, such as control, calibration, and final sign-off.

Simple design layout and staking without schedule delays

Boundary surveys and high-risk structural work still need a licensed surveyor. But most day-to-day layout as excavation limits, footings, curbs, storm drains, doesn’t.

With GNSS on site, crews can restake points knocked out by weather or equipment and keep moving instead of waiting. Design files go straight from the office to a phone or rover, cutting out paper plans and manual interpretation.

Using Reach receivers in combo with the Emlid Flow app, users can see their live position, accurate down to a centimeter level, relative to the project plan displayed on their screen. 

The software clearly directs them to the correct location for a stake, pin, or paint mark, simplifying the layout process. This straightforward staking function empowers the field team to take immediate control of routine layout.

As-built and utility digitalization before backfill

Once underground utilities are buried, they’re easy to lose. Paint fades. Stakes get crushed. And when the location data is gone, finding utilities later gets slow, expensive, and risky. 

Here’s where GNSS makes a difference. Before backfill, crews walk the trench with a rover and capture utilities as they go. Every point is logged with exact coordinates, a timestamp, and photos. No guessing later.

With the tilt compensation feature, you don’t even need the pole to be perfectly upright. You can measure safely from the edge of the trench and still get accurate results. Take the Emlid Reach RX2 or RS4 as an example: it nails accurate results even when severely tilted: a 30° tilt still gives you 18 mm precision. That’s a big deal for safely measuring deep trenches from the edge. 

You won’t need anyone to go down into the trench, which cuts out confined space risks and keeps your crew safe while meeting safety rules.

Related reading: This piece shows how Reach RX2 enables simple, scalable GNSS capture for GIS and construction, and how the RX2 Scanning Kit speeds up tasks like trench recording through continuous data capture.

Topographic surveys for earthworks planning and progress tracking

Accurate topographic data is critical at the beginning of a project and throughout construction. 

Before earthworks begin, contractors need to understand the actual terrain. All the information is used to validate digital designs, calculate cut/fill volumes, and confirm that bids are based on real conditions.

But the risk of getting it wrong is significant. For example, if a contractor estimates moving 5,000 m³ of material but the site actually requires 7,000 m³, the additional cost can erase the project’s entire profit margin. 

With Emlid Reach receivers, such as RS4 and RS4 Pro, in-house teams can gather terrain and elevation data accurately. A use case from Construction Manager Michael Lambert in the USA shows you exactly how this technology can help. During the early planning phase of a large construction project, Michael faced a familiar problem: accurate site data was needed immediately, but survey resources were not readily available.

At the time, he was responsible for BIM coordination and early field engineering tasks, even though field engineering was not formally part of his role. Waiting weeks for a rental-grade GNSS unit (or a survey crew) was not an option. 

“Here I am on the ground. I need to start capturing data now. And it might take two or three weeks to get a rental unit.”

Michael Lambert

Instead, Michael used the Emlid GNSS gear he already had and started capturing site data right away. He documented existing conditions and supported early planning—access routes, parking, material storage—long before construction kicked off.

“What really helped the most was at the very beginning of the project,” Michael said, describing how GNSS data collection supported logistics planning and design validation. Because the equipment was both accurate and cost-effective, it could be assigned directly to the job site rather than treated as a scarce, rented resource. 

By collecting topo data in-house, Michael skipped early delays and kept planning moving. The workflow was simple enough to use whenever data was needed, not just when a surveyor was available.

Related reading: See how Emlid Flow site survey app powered a 70-acre construction project

Drone mapping with GNSS control for fast, scalable site visibility

Drones equipped with RTK GNSS offer a simple way to monitor and measure a site. On a construction project, they handle many tasks: from capturing topographic surveys and monitoring daily progress to calculating stockpile volumes and validating as‑built conditions. 

With just an RTK drone, a GNSS base for corrections, and a few ground control points, you can plan a flight and collect georeferenced images in minutes.

If you’re worried about cost, rest easy: today’s RTK drones and GNSS receivers have become much more affordable and intuitive. 

To launch your in-house drone program, you need a one‑time investment in a small drone, a reliable GNSS base, and beginner-level drone pilot training (in the US, it’s the FAA Part 107 Remote Pilot Certificate). That investment pays for itself quickly by saving labor, preventing rework, and giving you accurate data on demand.

Scott Brown, construction technology manager at Garney, got started with RTK drone mapping by pairing a Reach receiver with an off‑the‑shelf quadcopter. “RTK with a Mavic… what did I have at the time? I had a Mavic 2 Pro,” he recalls. 

The decision to use Emlid receivers came down to affordability and simplicity: instead of lugging around a traditional survey kit, he wanted a small GNSS base he could throw in a case and take to the site.

Working together, a drone and a GNSS receiver deliver several benefits on site:

• Improved safety. Inspect hard-to-reach areas from the ground instead of sending personnel into potentially hazardous zones.
• Quick, accurate surveys. Fly large areas and get centimetre‑accurate maps without lengthy setups and all-day on-foot surveying.
• Reduced rework. Identify issues early and compare design models to reality to catch misalignments before they become expensive mistakes.
• Better collaboration. Share up‑to‑date 3D models and orthomosaics with everyone, from field crews to stakeholders, so decisions are based on the same information.

Remote oversight for managers: real-time control without site visits

Managing teams across multiple job sites is a constant balancing act. Keeping an eye on quality, catching issues early, and answering field questions usually means a lot of driving—and a lot of wasted time.

Field-to-office data sync changes that. With the Emlid Flow 360 cloud-based platform, field data shows up instantly in the office. Managers can review measurements, spot problems, and push updates while crews are still on site: no travel required. It’s like having a virtual survey lead on every job.

Equipping the earthworks supervisor with survey-grade GNSS

For Daniel Kenny, Head of the Surveying Department at KLS Earthworks, this kind of visibility isn’t a nice-to-have: it’s how he keeps dozens of projects moving at once.

In the slow season, KLS typically has around 30 active job sites. At peak times, that number can climb to 60 projects running simultaneously. Supporting that scale with a traditional, surveyor-only model simply wasn’t realistic.

Surveyor availability was a constant constraint. Simple tasks—like checking elevations—often couldn’t be done in time. If an earthworks supervisor needed a quick elevation check and Daniel couldn’t get there, the workaround was manual methods.

The risk was obvious: without proper verification, mistakes happened. Crews could get it wrong, and there was no easy way to confirm accuracy. In some cases, general contractors or inspectors would stop work entirely because a surveyor hadn’t been on site to verify the layout.

Before Daniel joined KLS, supervisors had access to full survey-grade equipment. On paper, it should have worked. In practice, it didn’t. The tools were too complex for non-surveyors. Even after formal training, supervisors struggled to use them correctly—and quickly abandoned them. Within months, the knowledge was gone.

Instead, KLS equips its site supervisors with Emlid GNSS receivers and Emlid Flow app to use directly on site. Surveyors retain control of the system setup and coordinate framework, while supervisors handle routine checks and layout as part of daily production.

As Daniel puts it, they were using equipment they shouldn’t have been using for the type of work they were doing. With Emlid, that dynamic flipped.

Supervisors who previously avoided GPS altogether now use GNSS confidently on site. The workflow is simple enough to stick to, and accurate enough to trust.

Where do in-house GNSS measurements end, and surveyors remain essential?

Empowering construction teams with GNSS does not mean eliminating surveyors. Professional surveyors remain essential for:

• Legal boundary surveys.
• Control networks and site calibration.
• High-risk, high-tolerance work.
• Regulatory and contractual sign-offs. 

The most successful projects define this boundary clearly. Routine GNSS tasks stay in-house, while surveyors focus on the work where their expertise has the greatest impact. 

Eliminate waiting, not GNSS accuracy

Construction projects are often delayed by slow access to accurate information, not a lack of accuracy itself. Emlid’s GNSS ecosystem solves this by enabling non-surveyor crews to handle routine spatial tasks with survey-grade accuracy.

Emlid Reach receivers offer centimeter-level RTK accuracy and don’t require heavy training.

In the field, the Emlid Flow app for iOS and Android simplifies complex GNSS work with visual, guided steps for tasks like stakeout, cut/fill checks, and as-built capture—no complicated setup or surveying experience needed.

Performing routine GNSS work in-house eliminates delays and reduces schedule risk without sacrificing precision. This keeps surveyors essential for specialized tasks. See how your construction projects can benefit from Emlid’s new generation of RTK GNSS.