Abstract
We present details of the calibration and validation procedure of UltraCam Aerial Camera systems. Results from the laboratory calibration and from validation flights are presented for both, the large format nadir cameras and the oblique cameras as well. Thus in this contribution we show results from the UltraCam Eagle and the UltraCam Falcon, both nadir mapping cameras, and the UltraCam Osprey, our oblique camera system. This sensor offers a mapping grade nadir component together with the four oblique camera heads. The geometric processing after the flight mission is being covered by the UltraMap software product. Thus we present details about the workflow as well. The first part consists of the initial post-processing which combines image information as well as camera parameters derived from the laboratory calibration. The second part, the traditional automated aerial triangulation (AAT) is the step from single images to blocks and enables an additional optimization process. We also present some special features of our software, which are designed to better support the operator to analyze large blocks of aerial images and to judge the quality of the photogrammetric set-up.
Highlights
The calibration procedure of the multiple head UltraCam digital aerial cameras was developed in 2003 and is continuously improved
In this contribution we show the new feature of UltraMap called “Visual Analytics”, which allows to efficiently manage and control a large set of images
UltraCam Osprey Prime II is the successor of the UltraCam Osprey Prime and is based on the same design concept consisting of a dual head panchromatic nadir component, single head RGB-color and near infrared nadir components complemented by a 4 direction RGB-color oblique component
Summary
The calibration procedure of the multiple head UltraCam digital aerial cameras was developed in 2003 and is continuously improved. This includes the recording of the temperature close to the CCD sensor arrays for every image taken with the camera and the improvement of the geometric processing of the images based on this information. Post-processing of UltraCam images as well as the photogrammetric production chain are implemented in the UltraMap software product. In this contribution we show the new feature of UltraMap called “Visual Analytics”, which allows to efficiently manage and control a large set of images. A fully three dimensional color coded presentation of the entire block and the adjusted orientation parameters of each image allow to detect deviations and errors in a very intuitive manner
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