Creating 3D model of a cliff in soft rocks using the method of digital photogrammetry

Klifovi u mekim stijenama vrlo su dinamičan okoliš koji se neprestano erodira i mijenja te je zbog sve većeg iskorištavanja u turističke i graditeljske svrhe važno pratiti eroziju klifova i uočiti moguće zone hazarda. S razvitkom tehnologije pojavile su se nove metode u izradi modela pri čemu se olakšavaju brojne analize klifova, a jedna od njih izrada je 3D modela metodom digitalne fotogrametrije. Metodom SfM-MVS fotogrametrije moguće je stvoriti digitalne modele reljefa klifa te utvrditi geomorfološke promjene na njima. U ovom radu prikazana je izrada 3D modela klifa na Duilovu koji je nastao u mekim stijenama, konkretnije u flišu. Predstavljeni su najbitniji koraci za izradu takve vrste modela te su objašnjeni najčešći problemi koji se mogu pojaviti pri izradi. Završni rezultat modeliranja klifa na Duilovu u ovom seminarskom radu je digitalni površinski model (DSM).Cliffs developed in soft rocks are a very dynamic environment that is constantly eroding and changing. Due to the increased use of cliffs for tourist and construction purposes, it is important to monitor erosional processes of cliffs and identify possible hazard zones. The rapid development of technology resulted in the emergence of new methods for modeling purposes, facilitating thus a various analysis of cliff processes. One of them is creating 3D models by digital photogrammetry. Using the SfM-MVS photogrammetry, it is possible to create digital models of cliffs and determine geomorphological changes in them. This paper is presenting the creation of a 3D model of a cliff in Duilovo which was made in soft rocks, more specifically in flysch. The most important steps for creating this type of model are presented, and the most common problems that may appear during the process are explained. The final result of cliff modeling in this paper is the digital surface model (DSM)