Potential Accuracy of Point Positioning Using High Resolution Satellite Imagery
Hala Hamed Amin;
Abstract
Several companies have conducted launches of high-resolution imaging satellites in the late
90's. For example, EarlyBird from Earth Watch Inc, OrbView-1 from Orbital Science Corporation, and IKONOS from Space Imaging. This generation of height resolution satellites is leading to a revolution in the fields of photogrammetric mapping and remote sensing. Furthermore, it is expected that high resolution satellites imaging have the potential for extracting geographic information with the accuracy level required by medium- and large-scale digital mapping products.
The problem under study is that the raw satellite images can not be used as maps because they contain geometric distortions that stem from the image acquisition process. To supply the same geometric integrity as a map, original raw imags must be geometrically corrected and the distortions must be compensated.
There are two approaches that are used to correct the various types of geometric distortions present in digital image data: Orbital geometry modeling and the transformation based on ground control points.
In orbital geometry modeling approach, all parameters of the time-variant image capturing process can be modeled rigorously normally and it is possible to model the inherent disturbing effects individually. This method needs adequate initial auxiliary information; which are not always available in the second approach, globally polynomial functions are applied on the image utilizing control information.
The thesis points at evaluating the potential accuracy of point positioning from high resolution satellite images. To reach this objective, the non-parametric approach, using several polynomials, has been applied and the results are compared and analyses. The influence of changing the number and distribution of control points are also studies. Control points that come from GPS surveying as well as from maps are tried. The results have shown the high geometric quality of satellite images and the feasibility of using them in produce large and medium scale maps.
90's. For example, EarlyBird from Earth Watch Inc, OrbView-1 from Orbital Science Corporation, and IKONOS from Space Imaging. This generation of height resolution satellites is leading to a revolution in the fields of photogrammetric mapping and remote sensing. Furthermore, it is expected that high resolution satellites imaging have the potential for extracting geographic information with the accuracy level required by medium- and large-scale digital mapping products.
The problem under study is that the raw satellite images can not be used as maps because they contain geometric distortions that stem from the image acquisition process. To supply the same geometric integrity as a map, original raw imags must be geometrically corrected and the distortions must be compensated.
There are two approaches that are used to correct the various types of geometric distortions present in digital image data: Orbital geometry modeling and the transformation based on ground control points.
In orbital geometry modeling approach, all parameters of the time-variant image capturing process can be modeled rigorously normally and it is possible to model the inherent disturbing effects individually. This method needs adequate initial auxiliary information; which are not always available in the second approach, globally polynomial functions are applied on the image utilizing control information.
The thesis points at evaluating the potential accuracy of point positioning from high resolution satellite images. To reach this objective, the non-parametric approach, using several polynomials, has been applied and the results are compared and analyses. The influence of changing the number and distribution of control points are also studies. Control points that come from GPS surveying as well as from maps are tried. The results have shown the high geometric quality of satellite images and the feasibility of using them in produce large and medium scale maps.
Other data
| Title | Potential Accuracy of Point Positioning Using High Resolution Satellite Imagery | Other Titles | الدقة الممكنة لإحداثيات النقط المحسوبة من الأقمار الصناعية ذات القدرة التحليلية العالية | Authors | Hala Hamed Amin | Issue Date | 2004 |
Recommend this item
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.