Exploring the UAV-Based Ground-Penetrating Radar for Historical Site Detection: A WWII Hiding Place Case Study near Bornerbroekseweg

This study evaluates the potential of Unmanned Aerial Vehicle-based Ground-Penetrating Radar (UAV-GPR) for identifying buried features related to a suspected World War II (WWII) hiding place near Bornerbroekseweg, the Netherlands. The survey area is an active farmland field with limited surface indicators and partially documented historical significance. A total of six UAV flight lines and four ground-based GPR paths were conducted to cover the site. Subsurface anomalies were identified at depths between approximately 0.2 and 1.5 m. In particular, Flight 6 revealed a near-surface reflection at 0.2–0.4 m, whereas Flight 4 showed a deeper horizontal anomaly at around 1.2–1.5 m. Ground-based Path 3 supported these findings with continuous horizontal reflections distinct from natural stratigraphy. The integration of UAV and ground-based data enabled full-site coverage and localized resolution, supporting the identification of areas warranting further archaeological investigation. The results demonstrate the applicability of UAV-GPR for non-invasive prospection in rural historical sites with uncertain spatialrecords and suggest its value for informing targeted excavations.