Why you need to use ground control points (GCP) for drone mapping

Authors

  • Eric Van Rees

Keywords:

mapping, photogrammetry, drone, GCP

Abstract

The article explains why Ground Control Points (GCPs) remain essential in drone mapping, even with the advent of
RTK/PPK drones. GCPs act as reliable reference markers that correct positional errors, ensuring that aerial imagery aligns
accurately with real-world coordinates. The text outlines how to design and place GCPs, how many are typically needed
(usually 5–10), and how they are integrated into photogrammetry software. By providing best practices and practical tips,
the article highlights how GCPs serve as a critical layer of quality control, guaranteeing accurate and dependable results for
applications in construction, surveying, and environmental monitoring.

Published

2025-10-14

How to Cite

Van Rees, E. (2025). Why you need to use ground control points (GCP) for drone mapping. GEOmedia, 29(3). Retrieved from https://mediageo.it/ojs/index.php/GEOmedia/article/view/2105