ACCURACY INVESTIGATION OF DEM BASED ON GÖKTÜRK-2 STEREO IMAGES

In December 18, 2012, Gokturk-2 satellite has been launched to the space from the Jiuguan station in China. The satellite has a pushbroom camera, which can take panchromatic images with 2.5 m resolution and multispectral images with 5 m resolution from 685 km elevation. The requests of Turkish Armed Forces, Turkish government agencies and institutes for satellite images has been satisfied by Gokturk-2 satellite imagery. High Resolution Satellite Images (HRSI) have been extensively used in fields of mapping, intelligence service, exploration, monitoring of environment, agriculture and change tracking; mapping is one of the most widespread application areas of HRSI. In order to use satellite images like a map, orthoimages are required taking care about image geometry and model configuration. Based on, Ground Control Points (GCP) a Digital Elevation Model was generated for the orthorectification. In this study, a stereo scene orientation was made using 20*60 km sized stereo pair of Gokturk-2 satellite with various, GCP and Check Point (CP) configurations. Furthermore, the accuracy of the generated Digital Elevation Model(DEM) was analyzed by heights of primary bench marks.