Infrastructure projects need GNSS correction services

Increase accuracy of surveying and construction jobs

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Services for wherever work takes you

Topnet Live is a global GNSS correction service that delivers positioning data to surveyors and construction teams whose projects use satellite positioning. Roving surveyors and construction workers, along with heavy construction equipment with satellite navigation systems, use this service for high-accuracy applications such as field surveys, jobsite layout, earthworks, paving, and as-built reporting.

Why are GNSS correction services needed in construction and survey?

GNSS receivers must compensate for inaccuracies related to satellite constellations and atmospheric conditions. If these signals are not corrected, position calibration can be off by several meters - causing construction clashes, rework, safety risks, or even property disputes.

Full-constellation service

The Topcon reference station network uses five GNSS satellite systems: GPS, GLONASS, Galileo, QZSS, and BeiDou. This ensures the best global coverage, accuracy, and reliability.

What are RTK and PPP, and why do they matter?

RTK (Real-Time Kinematic positioning)

Realpoint uses a network of regional reference stations to enhance satellite positioning data. Start-up time is nearly instant when in range of the network.

Constant coverage

SkyBridge provides seamless PPP infill support in areas where RTK coverage is limited.

PPP (Precise Point Positioning)

Starpoint Pro calculates positions at the centimeter level using a single receiver in a global reference framework. It has a slower start-up speed, but provides service anywhere on the planet, independent of local networks.

Topnet Live service options

Choose RTK, PPP, or bridge both with borderless service that automatically switches between regional GNSS reference networks. Several subscriptions are available on the Topnet Live website.

Realpoint

Description

Provides network RTK accuracy and a quick start-up time where Topnet Live is available

Correction type / delivery

RTK via cellular network

Coverage

Regional

Accuracy

2 cm

Initialization time

Seconds

Supported field software

Topcon Field
Pocket3D
3D-MC

Skybridge

Description

Provides and maintains positional accuracy when RTK services are interrupted

Correction type / delivery

Corrections via satellite

Coverage

Regional or local

Accuracy

Infill for RTK

Initialization time

Automatically activates when
RTK signal is lost

Supported field software

Topcon Field

Starpoint Pro

Description

Provides PPP service anywhere on the planet, independent of local
networks

Correction type / delivery

PPP via L-Band or NTRIP

Coverage

Global

Accuracy

3-6 cm

Initialization time

< 20 minutes

Supported field software

Topcon Field

What's your application?

Learn about GNSS receivers and machine control systems that work with Topnet Live.

Use Topnet Live with a rover

GNSS receivers are the backbone of any base and rover setup. Choose from receivers designed for semi-permanent mounting or others that can quickly screw to the top of a tripod or range pole.

Learn more