Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-1/W1, 493-498, 2017
https://doi.org/10.5194/isprs-archives-XLII-1-W1-493-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
31 May 2017
USE OF VERTICAL AERIAL IMAGES FOR SEMI-OBLIQUE MAPPING
D. Poli1, K. Moe1, K. Legat2, I. Toschi2, F. Lago2, and F. Remondino2 1Terra Messflug GmbH, Eichenweg 42, 6460 Imst, Austria
23D Optical Metrology (3DOM) unit, Bruno Kessler Foundation (FBK), Trento, Italy
Keywords: Aerial photogrammetry, Oblique camera, Modelling, Mapping Abstract. The paper proposes a methodology for the use of the oblique sections of images from large-format photogrammetric cameras, by exploiting the effect of the central perspective geometry in the lateral parts of the nadir images (“semi-oblique” images). The point of origin of the investigation was the execution of a photogrammetric flight over Norcia (Italy), which was seriously damaged after the earthquake of 30/10/2016. Contrary to the original plan of oblique acquisitions, the flight was executed on 15/11/2017 using an UltraCam Eagle camera with focal length 80 mm, and combining two flight plans, rotated by 90º (“crisscross” flight). The images (GSD 5 cm) were used to extract a 2.5D DSM cloud, sampled to a XY-grid size of 2 GSD, a 3D point clouds with a mean spatial resolution of 1 GSD and a 3D mesh model at a resolution of 10 cm of the historic centre of Norcia for a quantitative assessment of the damages. From the acquired nadir images the “semi-oblique” images (forward, backward, left and right views) could be extracted and processed in a modified version of GEOBLY software for measurements and restitution purposes. The potential of such semi-oblique image acquisitions from nadir-view cameras is hereafter shown and commented.
Conference paper (PDF, 1827 KB)


Citation: Poli, D., Moe, K., Legat, K., Toschi, I., Lago, F., and Remondino, F.: USE OF VERTICAL AERIAL IMAGES FOR SEMI-OBLIQUE MAPPING, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-1/W1, 493-498, https://doi.org/10.5194/isprs-archives-XLII-1-W1-493-2017, 2017.

BibTeX EndNote Reference Manager XML