SGEM 2019. 19th International Multidisciplinary Scientific GeoConference. Volume 19. Informatics, Geoinformatics and Remote Sensing : conference proceedings. Albena, Bulgaria, 30 June - 6 July 2019. Issue 2.2 Geodesy and Mine Surveying, Photogrammetry and Remote Sensing, Cartography and GIS. 1. vyd. Sofia : STEF 92 Technology, 2019. 1086 s. ISBN 978-619-7408-80-5. ISSN 1314-2704.