1. Associate Professor, Dept. of Graphic Expression, Area of Cartographic Engineering, Geodesy and Photogrammetry, Univ. of Extremadura, Mérida 06800, Spain (corresponding author). ORCID: .
2. Associate Professor, Dept. of Graphic Expression, Area of Cartographic Engineering, Geodesy and Photogrammetry, Univ. of Extremadura, Cáceres 10003, Spain. ORCID: .
3. Professor, Dept. of Graphic Expression, Area of Cartographic Engineering, Geodesy and Photogrammetry, Univ. of Extremadura, Mérida 06800, Spain.