How to choose a GNSS receiver for surveying
Six questions that help you choose between a compact, a universal, a camera or a laser rover, and what else you need besides the receiver.
A GNSS RTK receiver is a surveyor's most common purchase, and the range of models can look confusing. Much of the choice comes down to a few simple questions about your work. Below we go through them in order, with links to the Meridian models in the catalog. All specification values come from the manufacturer's data; the exact configuration and availability are confirmed when you request a quote.
1. What work do you do most often
For everyday topographic surveys, cadastre and stakeout, a universal rover is enough. For work where the point cannot be reached with a pole (building corners, fences, dangerous areas) there are laser models. For surveying in hard-to-reach places or visual stakeout there are camera models. If you also work inside buildings or scan spaces, consider a SLAM scanner.
2. How much weight matters
If you carry the equipment all day, weight is noticeable. The compact receivers with IMU category includes the M2Pro and M3, which weigh under 170 g, and the M3Plus. Universal and laser models are heavier but offer more functions.
3. Universal rover
Universal RTK rovers (M5Plus, M6Plus, M10, M7, M20Lite) cover most field work. The differences are in communications (radio, 4G), memory, runtime and battery. For example, the M7 has a built-in 5 W radio and a removable battery, and the M6Plus has 4G and WiFi. Choose according to how you will receive corrections.
4. Cameras, laser, photogrammetry
- Visual receivers (AR): the M20 and M30 have cameras for measuring points from images and for augmented-reality stakeout
- Receivers with laser: the M20L, M25, ML2 and Warrior measure points without a pole
- Laser and photogrammetry: the M20LV and M27LV also add photogrammetry for hard-to-reach points
These functions add cost and weight, so take them only if you will use them often.
5. How you get RTK corrections
There are two main ways: a network of permanent stations over mobile internet (NTRIP), or your own base with a radio. If you work in areas with mobile coverage and have access to a correction network, a receiver with 4G is enough. If you work where there is no internet, or want independence, you need a base station and a radio. Details are in the article about RTK and correction networks.
6. What you need besides the receiver
A rover does not work alone. The most common additions are:
- a controller or phone with field software, see controllers and software
- a pole, mount and other accessories
- a base, if you do not use a correction network
- a subscription to a correction network, where applicable
Do not pay for functions you will not use
It is often more practical to start with a universal rover and add what you need than to buy a model with every function from the start. If you do not measure inaccessible points, the laser will not help you. If you work mostly on open terrain, cameras will add little. Describe your work and we will suggest a suitable configuration.
Short checklist
- What accuracy and what kinds of work I have (cadastre, stakeout, construction, agriculture)
- How I get corrections: a network, my own base or both
- Whether I need a laser, cameras or an IMU for tilt
- How much weight and runtime matter
- Whether my work falls under legal metrological control and what that means for verification
Not sure? Send us a description of your work and we will recommend options. Add the models you like to the quote cart or write to us on the Contacts page. All receivers are in the GNSS receivers section.