Comparison of Orthomosaic Accuracy Based on Unmanned Aerial Vehicle (UAV) Real Time Kinematic (RTK) Radio and RTK NTRIP in Padang City, West Sumatra

Authors

  • Muhammad Ismail Vocational School, Universitas Negeri Padang, Indonesia https://orcid.org/0009-0006-9570-3615
  • Bayu Wijayanto Department of Geography, Faculty of Social Sciences, Universitas Negeri Padang, Indonesia https://orcid.org/0000-0001-9279-6592
  • Randi Proska Sandra Department of Electronics Engineering, Faculty of Engineering, Universitas Negeri Padang, Indonesia https://orcid.org/0000-0002-4848-9760
  • Wikan Jaya Prihantarto Vocational School, Universitas Negeri Padang, Indonesia https://orcid.org/0000-0002-4544-0734
  • Elisa Maiyenti Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Padang, Indonesia
  • M Sriharta Urban Spasial Indonesia
  • Rahmat Fitrian Vocational School, Universitas Negeri Padang, Indonesia
  • Mutiara Amelia Putri Vocational School, Universitas Negeri Padang, Indonesia

DOI:

https://doi.org/10.24114/jg.v17i2.68287

Keywords:

Orthomosaic Accuracy, UAV, RTK Radio, RTK NTRIP

Abstract

UAVs with RTK technology offer high-accuracy aerial mapping, with RTK Radio and RTK NTRIP as two correction methods affecting orthomosaic precision. While previous studies compared these methods in terrestrial surveys, their impact on UAV-based orthomosaics remains underexplored. This research evaluates and compares the accuracy of UAV-derived orthomosaics using RTK Radio and RTK NTRIP to provide practical guidance for optimal mapping applications. This research combined UAV RTK photogrammetry and GIS to produce high-precision aerial maps in two areas of Padang City with different topographies. Data were collected using DJI Mavic 3 Enterprise RTK with RTK Radio and RTK NTRIP techniques, supported by GCPs, BMs, and satellite imagery, then processed into orthomosaics for analysis. Accuracy was assessed using ICPs and statistical measures like RMSE to compare the spatial precision of both correction methods under varying terrain conditions. The results show a difference in mapping accuracy between RTK Radio and RTK NTRIP aerial photographs, with RTK Radio achieving 0.683 accuracy and 0.450 RMSE, while RTK NTRIP reached 0.563 accuracy and 0.371 RMSE. RTK Radio is more suitable for areas lacking CORS access but still requires GCP verification. RTK NTRIP performs better in urban areas with strong CORS networks. Combining both methods with adequate GCPs provides an effective solution for mapping in varied or densely vegetated terrains.

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Published

2025-09-09

How to Cite

Ismail, M., Wijayanto, B., Sandra, R. P., Prihantarto, W. J., Maiyenti, E., Sriharta, M., … Putri, M. A. (2025). Comparison of Orthomosaic Accuracy Based on Unmanned Aerial Vehicle (UAV) Real Time Kinematic (RTK) Radio and RTK NTRIP in Padang City, West Sumatra. JURNAL GEOGRAFI, 17(2), 332–343. https://doi.org/10.24114/jg.v17i2.68287