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Figure 12. 
Regional Maps at a scale of 1:10,000 were used as reference 
maps; these maps are available in vector format for the territory 
of Contessa Entellina and in raster format for the territories of 
Palermo and Scopello. 
Test operations were carried out through an application, written 
in Avenue language in Arc View environment. 
8. CONCLUSIONS 
The current availability of high resolution satellite images 
permits to develop a methodology alternative to the 
photogrammetric one for the production of medium scale 
orthophotos through the association of a single image to a 
suitable DEM. In this regard the described work research 
demonstrated that the geometrical accuracy obtained by using 
IKONOS Geo and QuickBird Standard images is compatible 
with map scales of 1:10,000 and, sometimes, of 1:5000, despite 
limits of such kind of data. For this reason it looks right to 
investigate deeper the use of satellite images for making maps. 
In this specific test pre-processed images and non-parametric 
models were used. Nowadays, more interesting possibilities are 
open to researchers, for example the analysis of not pre- 
processed images, or, when possible, the use of right math 
correction models, or, finally, the availability of sterco images. 
Moreover, it is important to emphasize the advantage in 
simplifying the image orientation procedures compared with 
traditional photogrammetric ones. That is because a single 
satellite scene covers a larger area than a single aerial 
photograph at the same scale. 
598 
REFERENCES 
Cheng P., Toutin T., Zhang Y., Wood M.; 2003. “QuickBird — 
Geometric Correction, Path and Block Processing and Data 
Fusion”. 
http://www.pcigeomatics.com/news/eom quickbird 2003.pdf 
Cheng P., Toutin T., Zhang Y., 2003. *QuickBird — Geometric 
Correction, data fusion, and automatic DEM extraction". 
http://www.pcigeomatics.com/tech-papers/aers03 cheng.pdf 
Dial G., Grodecki J., 2003. /KONOS Stereo Accuracy without 
Ground Control, Proceedings of ASPRS 2003 Conference, 
Anchorage, Alaska, May 5-9, 2003. 
Dial G., Grodecki J., 2003. Block Adjustment of High- 
Resolution Satellite Images Described by Rational Polynomials. 
Photogrammetric Engineering and Remote Sensing, Vol. 69, 
n°1: pp. 59-68. 
Dial G., Grodecki J., 2003. Applications of IKONOS Imagery. 
Proceedings of ASPRS 2003 Conference, Anchorage, Alaska, 
May 5-9, 2003. 
Ganas A., Lagios E., Tzannetos N, 2002. “An investigation 
into the spatial accuracy of the IKONOS 2 orthoimagery within 
an urban environment". National Observatory of Athens, 
[Institute of Geodynamics. 
http;//www.pcigeomatics.com/tech-papers/ganas2002ijrs.pdf 
[KONOS Imagery Product and Product Guide, 2003. 
Space Imaging LLC 
WWW .spaceimaging.com 
Quickbird imagery product — Product Guide, 2003. 
Digitalglobe Inc. 
www .digitalglobe.com 
PCI Geomatics Users Guide — OrthoEngine Reference Manual. 
www.pcigeomatics.com 
Smith D. P., Atkinson S. F., 2001, Accuracy of rectification 
using topographic maps versus GPS ground control points, 
Photogrammetric Engineering and Remote Sensing, V 01:67,.n? 
5, pp. 585-587. 
Toutin T., 2003. Geometric processing of Remote Sensing 
images: models, algorithms and methods. International journal 
of Remote Sensing, n?24. 
Zhou G. R. Li., Yang S., Tuell G., Schimdt N. J., Fower C., 
2000. A study of the potential attainable geometric accuracy of 
IKONOS satellite imagery, International 
Photogrammetry and Remote sensing, Amsterdam, XXXIII, 
Part B4. 
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