3D Data, extracted from stereoscopic images, are considered as the main input for digital modeling and GIS database construction. These data are usually collected by using professional software. This kind of tools, is difficult to use by the non-specialists. In this study, we propose to use the free academic photogrammetric softwares that are available in the internet, to achieve interior and exterior orientations of images. But, before this step, these softwares must be evaluated. In our research, we applied a software developed by an academic photogrammetric society. The software was applied to calculate the orientation parameters of a stereoscopic pair of aerial photos taken for an urban area. After that, the results were evaluated by the help of a professional photogrammetric software. Finally, a group of stereoscopic analysis was done by using the academic software. Again, the results were evaluated by the help of a professional software.
Tishreen University Journal.
2016.
Evaluation of free photogrammetric software and its use in 3D data extraction
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