Field mapping
Attach boundaries, observations, and infrastructure to repeatable geographic coordinates.
SATELLITE POSITIONING FOR FIELD OPERATIONS
GNSS
Global Navigation Satellite Systems provide the positioning, navigation, and timing foundation used to map fields, guide machines, locate observations, and connect agricultural data to place.
01 / Overview
Signals from space,
position in the field.
GNSS is the general term for satellite constellations that provide global positioning, navigation, and timing services. GPS, Galileo, GLONASS, and BeiDou are separate GNSS constellations.
Receivers use ranging and timing data transmitted by satellites to estimate location. The result is not a fixed accuracy guarantee: receiver design, satellite geometry, signal obstruction, atmospheric effects, interference, and correction services all influence field performance.
02 / Positioning chain
From constellation
to machine action.
This educational flow shows the major layers that turn satellite signals into a position used by an agricultural machine.
SPACE / 01ConstellationsRanging and timing signals
FIELD / 02GNSS antennaSignal reception
COMPUTE / 03ReceiverPosition solution
MACHINE / 04Guidance systemMapping, steering, and records
03 / Agriculture
One reference,
many field workflows.
GPS.gov identifies field mapping, soil sampling, tractor guidance, crop scouting, variable-rate application, and yield mapping among positioning-enabled agricultural uses.
Machine guidance
Support repeatable passes and field navigation, including work in limited visibility.
Spatial application
Relate prescriptions and machine actions to specific positions in a field.
Yield and scouting
Connect observations and measured outputs to location for later analysis.
04 / Boundaries
GNSS is a foundation,
not an accuracy claim.
GNSS is not the same as GPS.GPS is one constellation; multi-constellation receivers may use signals from several systems.
Accuracy and repeatability differ.A system can return near a previous path consistently without every coordinate having the same absolute accuracy.
Correction method matters.RTK, network corrections, PPP, and other augmentation approaches have different infrastructure and operating characteristics.
05 / Evidence
Primary sources.
This briefing uses official EUSPA and GPS.gov explanations. Agricultural performance depends on the complete receiver, correction, installation, environment, and machine-control system.
01
What is GNSSEuropean Union Agency for the Space Programme · Accessed 2026-07-11