The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part Bl. Beijing 2008
due to the large project-dependent part of the systematic error.
It is very important in the future to measure DTM bending on a
block flown at a different GSD than the one used to produce a
single correction grid. In case such effect is significantly
reduced, an array of correction grids needs to be computed to
cover the span of all probable GSDs.
The main recommendation delivered in this work is that, given
a photogrammetric block with sufficient redundancy of image
observations and precise given EO, the best approach to obtain
a correction grid is to perform a bundle adjustment with
collocation. When precise GPS is available, the GPS-derived
Direct Geo Referencing (DGR) EO is used. When no precise
GPS is available, the self-calibrating bundle adjustment is
preformed to obtain precise EO and densified control points.
The DMC virtual images should be generated using the
correction grids during DMC Postprocessing.
Another direction of future work is to capture the systematic
distortion in the individual four PAN cameras by a collocation
grid using a calibration flight with proper overlap of PAN
camera footprints (i.e., all parallel strips flown in one direction).
This work will take care of 35% of total DMC error. Another
effort is to refine the geometric platform calibration procedure
to significantly reduce the remaining 65% of DMC error by
utilizing strong correlation of platform orientation parameters
from exposure to exposure along a strip.
Madani, M., Dôrstel C., Heipke C., Jacobsen K. (2004): DMC
practical experience and accuracy assessment. In: ISPRS
Proceedings 2004 Istanbul.
Madani, M (2001). Z/I Imaging New Automatic Aerial
Triangulation System, ASPRS Annual Conference, St. Louis,
MO, April 23-27, 2001.
Madani M., (1985). Accuracy Potential of Non-Metric Cameras
in Close-Range Photogrammetry Ph.D. Dissertation,
Department of Geodetic Science and Surveying, The Ohio State
University.
Riesinger, I (2006): Investigations on DMC (Digital Mapping
Camera) Auto-Calibration, Diploma Thesis, Munich Technical
University, Germany, 2006.
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Dôrstel C., 2007. DMC - (R)evolution on geometric accuracy,
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Dôrstel C., 2003. DMC - Practical experiences and
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