Volume XLII-2
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2, 983-989, 2018
https://doi.org/10.5194/isprs-archives-XLII-2-983-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2, 983-989, 2018
https://doi.org/10.5194/isprs-archives-XLII-2-983-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  30 May 2018

30 May 2018

DTM GENERATION THROUGH UAV SURVEY WITH A FISHEYE CAMERA ON A VINEYARD

G. Ronchetti, D. Pagliari, and G. Sona G. Ronchetti et al.
  • Politecnico di Milano, DICA - Geodesy and Geomatics section, Piazza Leonardo da Vinci 32, 20133 Milan, Italy

Keywords: UAV, Precision Agriculture, Fisheye, DTM, Kriging interpolation, Vegetation

Abstract. Precision agriculture recommends a sustainable employment of nutrients and water, according to the site-specific crop requirements. In this context, the knowledge of soil characteristics allows to appropriately manage resources. Even the topography can influence the spatial distribution of the water on a field. This work focuses on the production of high-resolution Digital Terrain Model (DTM) in agriculture by photogrammetric processing fisheye images, acquired with very light Unmanned Aerial Vehicle (UAV). Particular attention is given to the data processing procedures and to the assessment of the quality of the results, considering the peculiarity of the acquired images. An experimental test has been carried out on a vineyard located in Monzambano, Northern Italy, through photogrammetric survey with Parrot Bebop 2 UAV. It has been realized at the end of the vegetation season, to investigate the ground without any impediment due to the presence of leaves or branches. In addition, the survey has been used for evaluating the performance of Bebop fisheye camera in viticulture. Different flight strategies have been tested, together with different Ground Control Points (GCPs) and Check Points (CPs) configurations and software packages. The computed DTMs have been compared with a reference model obtained through Kriging interpolation of GNSS-RTK measurements. Residuals on CPs are of the order of 0.06 m, for all the considered scenarios, that for agricultural applications is by far sufficient. The photogrammetric DTMs show a good agreement with the reference one.