Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Yazarlar: Emre TERCAN

Konular:Mühendislik

DOI:10.28948/ngumuh.404265

Anahtar Kelimeler:UAV photogrammetry,Digital terrain model,Filtering,Roadway measurements,City transition

Özet:    In the roadway city center transitions where the traffic flow is dense and the detail to be measured is high, production of digital terrain model by terrestrial methods brings negation in terms of time and cost. Unmanned aerial vehicles (UAVs), which can carry measuring instruments with different skills and tend to decrease in cost, are effective systems for production of orthophoto and digital terrain model. In this study, point cloud and 4.9 cm spatial resolution orthophoto image of 700-meter roadway corridor was produced by using Structure From Motion (SFM) algorithm and an UAV supported by GNSS-IMU. After applying the Cloth Simulation Filtering (CSF) and Gaussian filtering methods to the obtained point cloud, the digital terrain model of the test roadway corridor was obtained. The accuracy of the UAV system was tested by the terrestrial method, it has been determined that UAV method can obtain 3D data with a vertical accuracy of 3.96 cm on hard surface grounds and 7.32 cm on soil grounds. The results show that the UAV systems is very effective in the production of orthophoto images and digital terrain models in roadway corridors which have flatness terrain and have no objects that prevent photogrammetric surveys.

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