Aerial digital cameras were first presented on the occasion of the ISPRS International Symposium in 2000. Since then, several papers that analyse the geometrical accuracy of digital camera have been presented. These works have underlined the fact that the geometric accuracy obtainable with the digital sensor is significantly higher than the accuracy achieved with scanned analogue cameras. Never...

Large size digital aerial frame cameras like Intergraph DMC and Vexcel UltraCam are becoming standard for photogrammetric application. It is difficult to compare the information contents of such cameras with this of analogue photographic cameras. Also the rules for project planning have to be checked if the old relation between photo scale and map scale is still valid. The photo scale has no lo...

By the Pegasus project digital line scanner images taken from an elevation of 20km, with a ground sampling distance (GSD) of 20cm, will be available. The photogrammetric use of such images is compared with traditional aerial photos, but also digital aerial cameras as well as high resolution space sensors. Line scanner images usually should be combined with direct sensor orientation. But for not...

Airborne photogrammetry is a fundamental technique for producing reliable, geometrically accurate, high-resolution geospatial information. Passive and active digital imaging is rapidly replacing film imaging in photogrammetric data capture. Optimal use of this new technology enables fast data capture, high accuracy, a high level of automation, and a huge increase in applications. The reliabilit...

A test area north of Philadelphia was flown with Vexcel Imaging UltraCamD, UltraCamX and Z/I Imaging DMC digital frame cameras as well as with the 3D-CCD-line scanner camera Leica ADS40 and the analogue RC30. The frame images have 60% overlap in both directions. The object resolution is approximately the same with ~ 5cm ground sampling distance (GSD). 42 well defined control and check points ar...