Digital Stationing vs. GPS Rovers
You already own a rover. You can't get to it. OnStation puts a station reading on every phone.
GPS rovers deliver survey-grade accuracy (sub-inch with RTK correction) for grading, earthwork, and machine control. They are the right tool when precision is the job. They cost $15,000 and up. A major project has one or two, and they live with the survey or grading crew. Most jobs have none.
Digital stationing turns every phone on the jobsite into a live station and offset reader, accurate within 3-5 feet. Open the app, see where you are on the alignment, document what you did with location and time stamped automatically. It is the right tool for the 95% of field work that does not need survey-grade precision: QC testing, inspection records, daily reports, photos, and the closeout package.
Two tools. Two jobs. One project.
A rover and OnStation are not in the same fight. They cover different parts of the work. The question is whether the people doing field documentation should keep waiting on the rover or carry their own station reading in their pocket.
Digital Stationing
For the 95% of field work that does not need survey-grade precision.
QC testing, inspection records, daily reports, photo documentation, locating where work happened, and the closeout package.
Every person on the project. Contractors, CEI inspectors, density techs, foremen, DOT staff, subs. Anyone with a phone has live station and offset.
3 to 5 feet horizontal. Accurate enough for documentation, testing locations, and field operations. Not a survey replacement.
About 10 minutes to set up. No hardware to buy. Licenses start at $468 per person per year. One license covers unlimited projects.
Photos, flags, and notes are stamped with station, offset, date, and time the moment they are captured. The closeout package writes itself.
Survey-Grade GNSS
For grading, earthwork, and the work that needs sub-inch precision.
Grade checking, machine control, mass excavation, stockpile measurement, survey-grade staking. The right tool when precision is the job.
The survey crew. The grading crew. One or two units per major project. The QC inspector and the CEI team are not carrying one.
Sub-inch with RTK correction and a base station. Survey-grade. Earns its cost when accuracy is the job.
$15,000+ for the rover. $40,000+ for base and rover together. Roughly $100,000 to equip a first base, rover, and machine. Hours of training to get a new operator competent.
A rover gives you a coordinate. Tying that coordinate back to a date-stamped photo, an inspection note, or a QC test result is on you.
OnStation connects to your existing GNSS receivers. Keep the rover. Use its precision when you need it. Carry OnStation for everything else.
STA: 1786+45 14R
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MM: 461.991
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LL: 30.380179,-95.067204
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LRS: 461.458 2L
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STA: 1786+45 14R = MM: 461.991 = LL: 30.380179,-95.067204 = LRS: 461.458 2L =
One rover per project. Everyone else stops working.
Rovers earn their cost on grading. They cannot earn it twice. When the QC inspector, the CEI team, and the density tech all need the same one unit to confirm a location, the project pays for the wait.
Industry pricing for a single high-accuracy GNSS rover. Add a base station and the typical first investment runs around $40K. Outfitting a machine adds more.
Documented average time saved per field action when crews use digital stationing instead of traditional methods. Across four actions a day, that compounds into a workday a week per worker.
A density tech saving 4.5 minutes per action across four actions a day puts back over $18,000 in labor across a paving season. Multiply across the crew and the math gets serious.
OnStation goes live in about 10 minutes. No hardware, no base station, no calibration. Compare that to hours of on-field training to get a new rover operator competent.
You already paid for the rover. Now put a station reading on every other phone on the job.
From the Field
Honest answers from teams that own both.
When does a GPS rover still make more sense than OnStation?
Anytime the work needs survey-grade precision. Final grading, machine control, mass excavation to a specific design surface, sub-inch staking, stockpile volume calculations that affect pay quantities. The rover is the right tool when precision is the job. OnStation does not replace it for those tasks.
How accurate is OnStation compared to a rover?
OnStation reads station and offset within 3 to 5 feet using your phone's GPS. A high-accuracy rover with RTK correction gets you sub-inch. The accuracy gap is real and we are not trying to hide it. The question is whether your inspector taking compaction test photos needs to be within an inch or within five feet. For documentation, QC testing locations, daily reports, and inspection records, three to five feet is plenty.
Does OnStation work with my existing GPS receivers?
Yes. OnStation has an integration for GNSS receivers, so the high-accuracy data your rover already produces can flow into the OnStation record. Your survey crew keeps doing what they do best, and the documentation around their work gets connected to the rest of the project automatically.
If we have a rover, why do we also need OnStation?
Because most projects have one rover, maybe two, and they belong to the survey or grading crew. The QC inspector, the CEI team, the foreman, and the DOT observer are not carrying one. They are wheeling, asking the grading operator to stop, or estimating. OnStation puts a station and offset reading on every phone on the project, so the people who never had access to the rover stop being blocked by it.
Will OnStation reduce our survey crew's workload?
It will reduce the calls into the survey crew that did not need to be calls. Customers report cutting survey base and rover locate calls dramatically when their inspection and QC teams have OnStation, freeing the survey crew to focus on the precision work only they can do.
What if I lose cell service on the jobsite?
OnStation caches project data for offline use. Crews keep working in dead zones and everything they capture syncs to the Data Portal once they are back in coverage. A rover with RTK still needs its correction signal; OnStation does not.
What design files does OnStation need?
CAD, DGN, DWG, XML, KML, DXF, ALG. The standard formats your design team already produces. If the project is not engineered, OnStation still works.
How long does setup take?
About 10 minutes. Upload the design files, OnStation processes them, and your team has live station and offset on every device. Compare that to the hours of on-field training a new rover operator needs to get competent.
What does it cost?
Licenses start at $468 per person per year for live station, offset, and design layer viewing. Capture and Data tiers add documentation, flagging, and export capabilities. One license covers unlimited projects. See current pricing.
In the Field
Learn how APEX Engineering integrated live digital stationing into their everyday workflow, improving productivity, increasing efficiencies, and saving money.
APEX Engineering Project Manager
“We started training our inspectors on GPS Rovers, but they’re expensive units and we don’t want more than one unit on a project at any given time. OnStation eliminates the need for constant access to the rovers.”
Field guides written by people who do this every day.
If you want to understand the workarounds your crews are using, what each one actually costs, and where digital stationing fits next to a rover, start here.
How to Find Your Station and Offset Without Survey Equipment
Walks through every workaround crews use today, including rovers, and what each one actually costs across a season.
Read the guide →What Is Stationing in Construction?
Stations, offsets, and why the plus sign is in there. The explanation that should have existed when you started.
Read the guide →Already own a rover? See how OnStation integrates with your existing GNSS receivers.
Keep the rover. Put a station reading on every other phone.
Setup takes about 10 minutes. No hardware to buy. One license covers unlimited projects. See OnStation on your own project files, or start your access period today.