249
5045700.00-:,
5045400.00—
5045300.00—-.
5045100.00-^-.
5044300.00-j?
5044800.00-
5045600.00-
5045500.00-
5045000
5044700.00-
1602300.00
160250C00
1602700.00
1602900.00
1603100.00 16G3300.CK
-50.00 to -7.00
-7.00 1D 7.00
7.00 to 30.00
Fig. 5 - DEM error plot on system B (5 m grid, 50 m support grid)
Acknowledgements
The authors are grateful to Mr. Quecchia of the
Comune di Botticino and to Rossi Italia for providing
image data and the reference DEM. Thanks go also to
Martin Zurn from JRC for scanning the images.
Finally, the Province of Brescia is aknowledge for
allowing the publication of the results.
References
Ackermann F. (1995) Some Considerations about
Feature Matching for the Automatic Generation of
Digital Elevation Models. OEEPE Publication n. 33.
231-240.
Bacher U. (1998): Experimental Studies into
Automated DEM generation on the DPW 770. Int.
Arch, of Photogrammetry and R.S.. Vol. XXXII. Part
4.
Baltsavias E. P. (1996): Digital Ortho-Images - A
Powerful Tool for the Extraction of Spatial- and Geo-
Information. ISPRS Journal of P&RS. Vol. 51, No. 2,
pp. 63 - 77.
Baltsavias E., Kaeser K. (1998): DTM and Orthoimage
generation - A thorough analysis and comparison of
four digital photogrammetric systems. Int. Arch, of
Photogrammetry and R.S., Vol. XXXII. Part 4.
Duperet A. (1996): Automatic Derivation of a DEM to
Produce Contour Lines. OEEPE Publication n. 33, 193-
219.
Gruen A., Baltsavias E. (1985): Adaptive Least
Squares Correlation with Geometrical Constraints.
Proc. of SPIE. Vol. 595. 72-82.
