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Use of digital elevation models is crucial in fast growing need on developing project documentation to design roads and other buildings. There are a lot of different digital elevation models available online for free download and free use. However the production of such models come from different sources and one can expect different results using different digital elevation models. In this paper evaluation of such digital elevation models will be given. Faculty of Geotechnical Engineering is monitoring exploitatio...

After enormous amount of ice rain during 2014. huge damage was done in forest in Croatia, especially in the city ?abar area. Result of ice rain damaged forests is wide spread of bark beetle. To prevent further spread of bark beetles infected trees should be cut down. In huge forest area great problem is to detect areas with infected trees. Main characteristics of bark beetle damage is change of treetop color. Treetop color depends on the stage of infection and it goes from green to yellow and to red. Optimal perio...