broj: 3-4/2021
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| RIJEČ UREDNIŠTVA | ||
| Uredništvo | ||
| Misunderstanding pdf HR EN | 113 | |
| IZVORNI ZNANSTVENI ČLANCI | ||
| Dino Hadžidervišagić, Azra Čabaravdić | UDK 630* 272 (001) https://doi.org/10.31298/sl.145.3-4.1 | |
| Importance and structural diversity of trees in a historical park pdf HR EN | 117 | |
| Dušan Jovanović, Milan Gavrilović, Mirko Borisov, Miro Govedarica | UDK 630*902 (001) https://doi.org/10.31298/sl.145.3-4.2 | |
| Deforestation monitoring with Sentinel 1 and Sentinel 2 images – the case study of Fruška gora (Serbia) pdf HR EN | 127 | |
| Summary Forest and forest ecosystems have a big importance for the whole living world on the earth. Rapid deforestation poses a great danger and increases the effects of climate change. Large forest areas are cut down every year around the world and these activities need to be closely monitored to reduce their negative impact. Knowledge of valid and current geospatial data on forests and forest areas, obtained by interpreting the data by remote sensing methods has great importance for rapid response and management of forest areas. Decisions that are based on outdated and insufficiently precise data can have negative consequences. The researched area of Fruška gora is located in Vojvodina and occupies the northern part of Srem. Due to its natural properties, it enjoys the status of a special nature reserve. Pastures and fertile land, vineyards and orchards, decorate the slopes and lower parts of Fruška gora, while the areas above 300 meters above sea level are covered with dense, deciduous forests. This paper presents a method of analysis of radar Sentinel 1 SAR satellite images, together with a combination of multispectral Sentinel 2 images, with the aim of identifying missing and newly formed forest areas, as well as assessing the usability of free, for everyone available radar satellite images for forest observation. The described methodology is based on the selection of areas of interest, the selection of radar images for the chosen time epoch, image processing, the selection of training sets by combining radar and multispectral images. The classification of radar images was performed on the Cloud platform using the Random Forest classification algorithm. The study showed that in each analysed period from 2016 to 2019, the area under missing forest is larger in relation to the newly created area under forests, as well as the growing trend of new forest areas. Estimation of classification accuracy for each observed time epoch was performed by calculating the error matrix and Kappa statistics, and the average classification accuracy was about 97%. Visual analysis and comparison of the obtained results with historical data confirmed the high accuracy of identification of missing forest areas. The presented method showed that RF classification of free Sentinel 1 and 2 satellite images, can be used as a reliable and up-to-date data for forest monitoring with satisfactory quality and very quickly. Key words: SAR; Copernicus; Random forest classification; forest monitoring; change detection | ||
| PRETHODNO PRIOPĆENJE | ||
| Boris Miklić, Anja Žmegač, Domagoj Trlin , Marko Orešković, Stjepan Mikac, Igor Anić | UDK 630* 111.8 https://doi.org/10.31298/sl.145.3-4.3 | |
| Climate sensitivity of black pine (Pinus nigra Arnold.) chronology in the Northern Velebit pdf HR EN | 137 | |
| Jelena Kranjec Orlović, Ida Bulovec, Milivoj Franjević, Damjan Franjević, Josip Skejo, Marin Biliškov, Danko Diminić, Boris Hrašovec | UDK 630*232.3 + 442 https://doi.org/10.31298/sl.145.3-4.4 | |
| Preliminary results on narrow-leaved ash (Fraxinus angustifolia Vahl) and green ash (Fraxinus pennsylvanica Marshall) seed entomofauna in Croatia pdf HR EN | 147 | |
| Mirjana Stevanov, Albina Tarjan Tobolka, Ljubomir Kljajić, Martina Kičić, Max Krott | UDK 630*903 https://doi.org/10.31298/sl.145.3-4.5 | |
| Analysis of conflicing interests on the example of the special nature reserve in Serbia: empirically analytical approach pdf HR EN | 155 | |
| Erol Akkuzu, Mustafa Şahin, Abdullah Ugiş, Ebru Bal | UDK 630* 453 https://doi.org/10.31298/sl.145.3-4.6 | |
| Assesment of trap color and trap height above the ground on the capture of Ips sexdentatus and Thanasimus formicarius pdf HR EN | 169 | |
| PREGLEDNI ČLANCI | ||
| Damir Barčić, Vlado Habjanec, Željko Španjol, Mario Šango | UDK 630* 111.5 + 421 https://doi.org/10.31298/sl.145.3-4.7 | |
| Analysis of raising windbreaks on the mediterranean karst of Croatia pdf HR EN | 175 | |