Accurate and up-to-date cadastral maps are fundamental for effective land administration, sustainable agricultural development, and secure land tenure, particularly in rural and agricultural zones where land is a primary economic asset. Traditional ground-based surveying methods for updating these maps are often time-consuming, labour-intensive, and costly, leading to significant backlogs and outdated land records in many regions. This research evaluates the efficacy of modern geodetic techniques - specifically, high-resolution satellite imagery, Unmanned Aerial Vehicles (UAVs or drones), and Global Navigation Satellite Systems (GNSS) - for the rapid and precise updating of cadastral maps. Through a comparative analysis of case studies and technical literature, we assessed these technologies in terms of positional accuracy, operational efficiency, cost-effectiveness, and suitability for capturing the complex boundaries typical of agricultural landscapes. Our findings indicate that UAV photogrammetry, with its ability to generate ultra-high-resolution orthophotos and 3D models, achieves centimetre-level accuracy and is exceptionally effective for delineating irregular boundaries, terraces, and smallholder plots. High-resolution satellite imagery (e.g., from WorldView or Pleiades) offers a viable solution for large-area coverage and periodic updates, with submeter accuracy suitable for most rural cadastral purposes. GNSS, particularly Real-Time Kinematic (RTK) systems, remains the gold standard for precise point positioning and ground truthing. The integration of these technologies in a hybrid approach - using satellites for initial reconnaissance, UAVs for detailed mapping of complex areas, and GNSS for ground control and verification - presents the most robust and efficient workflow. However, challenges such as regulatory frameworks for UAVs, technical capacity requirements, and initial investment costs must be addressed. We conclude that modern geodetic techniques offer a paradigm shift in cadastral updating, enabling faster, more accurate, and more affordable land administration. Their adoption is crucial for securing land rights, facilitating land consolidation, and supporting the sustainable management of agricultural lands in the 21st century.

GNSS, UAV, RTK, HRSI, GCP, photogrammetry, land measurements, agriculture

geodesy engineering

Presentation: poster