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The use of orthophotos produced from different altitudes in pipeline planning

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Mehmet Akif GÜNEN, Ümit Haluk ATASEVER and Erkan BEŞDOK

With the developments in camera lens technology and the drop in prices of Unmanned Aerial Vehicles (UAV), orthophotos have started to be produced faster and less costly with the help of aerial photogrammetry. In addition to cultural heritage documentation, disaster area planning, precision agriculture and surveillance, UAV systems are also taking place in new and different areas such as mapping of cliff regions, roadway planning and water pipeline planning. For remote sensing systems, the distance between the target being imaged and the image obtained platform plays an important role in orthophoto and DEM production, because of changing the spatial resolution. In this paper, the images obtained from different altitude (50,100,150m) belonging to the same regionwere taken into consideration by changing the ground sample distances and an application was made to apply the water pipeline planning. The Pipeline is determined by ground control points (GCP), tie Points and user estimates where the line passes using orthophotos obtained from different altitude. Real pipeline locations, GCPs and tie point were measured using Global Positioning System (GPS)/Real Time Kinematic (RTK) method. RMSEs of GCPs were evaluated among themselves and the digitized pipelines were evaluated statistically and visually by pipelines obtained by measured pipeline.

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