This paper first discusses the background and details of Rational Function Model (RFM) which describes the coordinates
in image space and object space, and then by incorporating additional parameters into the basic RFM, the
bias-compensated RFM is introduced. With different additional parameters, four kinds of bias-compensated RFM are put
forward and discussed. Finally an experimental test in Shanghai, China, is carried out with the Bias-compensated
Rational Function Model using QuickBird across-track stereo imagery and highly accuracy Ground Control Points (GCP)
as data source. Conclusion is drawn that with more well distributed GCPs, high 3D geo-positioning accuracy can be
obtained up to about 0.6 meter in plane direction and 0.7 meter in height direction.
KEYWORDS: Data conversion, Databases, Data modeling, Remote sensing, Data storage, Analytical research, Data integration, Global Positioning System, Data mining, Geographic information systems
To meet the need of the research and application of topographic changes on coastal belt, multi-source data of coastal belt, which are spatial and non-spatial, are collected, analyzed and managed. Ideas and methods on the integration of multiple sources spatial data, coming from GIS, RS and GPS, are briefly expatiated based on the work just mentioned and have been verified theoretic correctness and practical feasibility. The organization method of spatial information based on ArcSDE is efficient and adaptive to integration of multi-source. What we have done makes for the implementation of establishment of coastal belt database by Oracle and the study of data mining on the topographic changes of coastal belt.
Since the successful launch of DigitalGlobe's QuickBird satellite on Oct 18th, 2001, QuickBird imagery has become the best choice for large-scaled mapping using high resolution satellite images. This paper first presents a quantitative evaluation of the geometric accuracy that can be achieved with QuickBird imagery using the metadata provided with DigitalGlobe's image products, then the technology of spatial visualization for the accuracy determination and the whole expression are put forward.
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