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Testing the stereoscopic precision of a large-format digital camera

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The use of large-format digital cameras in aerial photogrammetry is leading to great improvements in photogrammetric production. Since they were first introduced about 10 years ago, the technological community has been testing and investigating the conditions under which this major change can be consolidated. But a certain (and understandable) bias may be noticed in the efforts that developers, researchers and clients are undertaking. Almost all of the efforts aim at checking the quality of automated measurements and very little attention has been directed to stereoscopic measurements by human operators, which, nevertheless, still represent an important task that needs to be carried out in the production chain. This paper presents the results from a number of tests (13 operators from a variety of enterprises) performed to check the stereoscopic precision of Vexcel UltraCamD camera images compared with Leica RC30 film images. The main conclusion to be drawn from the empirical data is that stereoscopic precision does not depend on the type of camera.

Keywords: aerial photogrammetry; ground sample distance; large-format digital cameras; statistical comparison; stereoscopic precision

Document Type: Research Article


Affiliations: 1: ( )University of Leon, Spain, Email: 2: ( )University of Salamanca, Ávila, Spain“Authors' Addresses”, Email:

Publication date: June 1, 2009


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