| Summary: | Satellite imagery
has an important place today in terms of responding to the increasing need for
geospatial base in many different fields and disciplines, especially because of
their geographical availability and temporal resolution. Because all kinds of
geospatial information and data production processes such as orthoimages, maps,
vector data and etc. in especially for large project areas provide the
opportunity to reduce the cost and time required in the field work, so the
interest in high resolution satellite imagery. Göktürk-1, an electro-optical
ground observation satellite that was launched into the orbit on 05 December
2016 and acquiring 0.50 m spatial resolution imagery, aims to meet the high
resolution image requirements of Turkey.
In this study, the
horizontal and vertical accuracy of Digital Surface Model (DSM) and orthoimages
produced by different methods from stereo images obtained from Göktürk-1
satellite in two different regions were investigated. As a result, although the
pointing accuracy and DSM accuracy produced from Göktürk-1 satellite imagery, will
vary according to the incidence angle of Göktürk-1 satellite, the Digital Terrain
Model (DTM) used in the production of the orthoimage, the selected method for
orientation of satellite imagery; a planimetric accuracy of better than ± 2 m
RMS in orthoimage and a height accuracy of better than ± 3 m RMS is
accomplished.
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