Two Men and Nine Years: Contribution of Karsten Jacobsen and Gürcan Büyüksalih to Photogrammetry and Remote Sensing Activities of Department of Geomatics Engineering at Zonguldak Bülent Ecevit University - Topan, H.; Akçın, H.; Oruç, M.; Marangoz, A. M.; Atalay, C.; Bayık, Ç. (Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., 2025)