期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B4
页码：449-451
出版社：Copernicus Publications
摘要：With the developments in computer technology, 3D models of objects are transferred to the digital form from the hardcopy form. Sometimes, the visualization of topography from the classical maps or orthophoto maps, which are enhanced with contour lines, can be difficult for users. So firstly, embossed maps have been used for topographic visualization. But the production of these kinds of maps is very difficult, very costly and time consuming. This visualization can be done digitally faster, cheaper and continuously. In this Project, Landsat-7 images covering all Turkey are used. Firstly, panchromatic band and multi-spectral bands of the images were merged. For the best result, different merging algorithms were tested. In the second step, these images were ortho-rectified by using the ground control points and digital elevation models. The ortho-rectified images were mosaicked. 3D visualization was performed by using Erdas Imagine Virtual GIS module. The model was enhanced with some additional data. Since the model covers a very huge area, gazetteer information was added to the model to show the location names. Also some boundaries and road network was superimposed to the visualization. The images of important and historical places were added. As a result of Project, a user can fly over all Turkey, may watch the topography, cities, historical and touristical places by using this model. Thanks to the computer technology, user can do this seamlessly with the preferred detail and scale. This technology is taking place of the classical embossed map with its inexpensiveness, flexibility and easy production
