TY - JOUR A1 - Schmitz, S. A1 - Weinmann, M. A1 - Ruf, B. T1 - AUTOMATIC CO-REGISTRATION OF AERIAL IMAGERY AND UNTEXTURED MODEL DATA UTILIZING AVERAGE SHADING GRADIENTS JO - Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Archives VL - XLII-2/W13 SP - 581 EP - 588 Y1 - 2019/06/04 PB - Copernicus Publications SN - 2194-9034 UR - https://isprs-archives.copernicus.org/articles/XLII-2-W13/581/2019/ L1 - https://isprs-archives.copernicus.org/articles/XLII-2-W13/581/2019/isprs-archives-XLII-2-W13-581-2019.pdf DO - 10.5194/isprs-archives-XLII-2-W13-581-2019 ER -