RTK / NTRIP (Real-Time Kinematic / Networked Transport of RTCM via Internet Protocol)

RTK is a satellite-positioning technique that uses carrier-phase corrections from a nearby reference station to resolve position far more precisely than standard GPS, and NTRIP is the standard protocol for streaming those corrections to a rover over the internet. High-precision positioning is used widely across surveying, mapping, and infrastructure inspection wherever repeat measurements need to line up accurately enough that a difference between them reflects real change rather than positioning error.