Abstract
As more GISs are used in many institutions and fields, the importance of keeping GIS database current is keenly recognized. To fulfill the requirement, a concept of dynamic update of GIS databases using a wide variety of data from multiple sources is proposed and a methodological framework is proposed to realize it. At first, a model to represent geo-objects with spatio- temporal uncertainties is proposed. The model can serve as a basis to handle geo-objects with different levels of spatio-temporal uncertainties especially in integrating data from multiple sources. Secondly, a method is proposed to estimate or reconstruct the status of relatively static geo-objects which only emerge and extinguish using observational data from multiple sources. Further extension of the method is required to estimate the status of more dynamic geo-objects. To merge geometric data with different levels of uncertainties, a method to estimate the `most probable' position of a line feature with a statistically sound basis is proposed. It is necessary to validate the effectiveness of this methodological framework using actual data of an urban object such as houses or structures.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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