Assessment of UAV-photogrammetric mapping accuracy based on variation of ground control points
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Agüera Vega, Francisco; Carvajal Ramírez, Fernando; Martínez Carricondo, Patricio Jesús; Mesas Carrascosa, Francisco Javier; García Ferrer, Alfonso; [et al.]Fecha
2018Resumen
Civil engineering uses digital elevation models (DEMs) and orthophotos as basic material to be able to design
and execute any project. UAV photogrammetry has made it possible to obtain this type of information in an
economic and practical way. However, it is necessary to know the accuracy of the data and that it is within the
admissible limits. There are many factors that affect the accuracy of products resulting from UAV photogrammetry.
Of all of these, the effect of the number of ground control points (GCPs) and their distribution in the
study area are especially significant. Different distributions of GCPs have been studied to try to optimize the
products obtained by UAV photogrammetry. Of all the distributions tested, the best results were obtained with
edge distribution and stratified distribution. Therefore, it is necessary to place GCPs around the edge of the study
area to minimize planimetry errors. In addition, it is advisable to create a stratified distribution inside...
Palabra/s clave
Unmanned aerial vehicle (UAV)
UAV photogrammetry
Structure from motion (SfM)
Cut slope
Extreme topography
Landslide