Investigation Of Temporal Changes Of Urban Details Using Object-Based Image Analysis (original) (raw)

New approaches of image classification such as "Object-Based Image Analysis" (OBIA) utilize to obtain information contents of the images widely used in recent years. The images having ground sampling distance of 0.5-1.0m recently regarded as the high resolution remote sensing images are widely used in recent remote sensing technologies. They are very important and required data for obtaining spatial data using their information contents. With regard to the arrangement of remote sensing images for any mapping applications, there are some existing methods, algorithms and the processes for their geometric corrections and enhancements. Critical decisions for applications mentioned above; up-to-date, fast and low cost that can be achieved data are needed. Therefore, using satellite images is preferred in these application areas. In this study, Zonguldak testfield has been selected which is agro-industrial City and has rolling topography along the Black Sea Coast in Turkey. Intensive mining operation and applications have been made in this region for about 150 years. In this region, some geological and geomorphological land changes have been occurred during the removing processes of the significant reserves of coal mines. Because of the extraction, processes and exporting the coal mining, some requirements have been occurred like new facilities and using new settlement areas. In this context, the scope of using Zonguldak test area is selected as has been engaging in. High resolution Ikonos-2, Quickbird-2 and Worldview-2 images of 2002, 2004, 2008 and 2012 covering Zonguldak City in Turkey have been used in this study. Firstly, urban objects like coastline, building and road in the images have been digitized using manual on-screen digitizing approach. Then, these objects mentioned above have been detected, recognized and extracted using eCognition Developer v8.9 and OBIA. The results have been compared with the reference vector maps scale of 1/5000 of testfield, and the success of object-based image analysis of final results were compared and contrasted respectively with other vector products, which had been obtained by the method of manual on-screen digitizing results, has been tested by GIS software. Consequently, the results and discussions about the production and updating of maps at the scale of 1/5000, which are recently and widely used by local authorities and public organizations, have been presented. Also numerical results have been produced after analyses to investigate temporal changes of objects in Zonguldak testfield.