3D feature positioning in historical building using spherical panoramic image mosaics: Case study Surabaya City Hall front façade

Panoramic photography allows the creation of impressive spherical panorama. This type of image has unlimited field of view which provides spatial informations from all directions. Therefore, the number of images for 3D-positioning of more points around can be reduced. This image is suitable for recording large object closer, such as building façade without reducing image coverage. This research studies a method for 3D feature positioning on cultural heritage building using spherical panorama. The test site is the front façade of Surabaya City Hall. The panoramas were created by image stitching method. The 3D-positioning was done through space resection and intersection. The results show that the accuracy in X, Y, and Z coordinate are 0.053 m, 0.038 m, and 0.024 m respectively. This level of accuracy further can be optimized with bundle adjustment.