A COMPREHENSIVE SPATIAL UNCERTAINTY MODEL FOR AN OBJECT-BASED GIS

محل انتشار: همایش ژئوماتیک 82
سال انتشار: 1382
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,905

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شناسه ملی سند علمی:

GEO82_29

تاریخ نمایه سازی: 25 آذر 1384

چکیده مقاله:

Geospatial Information systems (GISs) play an active role in decision-making processes in many disciplines, research, and/or management using spatial data, at the global, regional, local or municipal level. More effective use of GIS, however, requires explicit knowledge of the uncertainty inherent in the data, particularly positional data. This becomes more important as the potential impact of decisions based upon GIS increases. The widespread use of GIS as a decision support system is, therefore, dependent on the development of formal modeling of uncertainty in spatial databases. This paper focuses on positional errors that refer to the discrepancy between the true location of certain geometric primitives and their measured or expressed locations. If true values are not available, uncertainty is substituted for error. The current uncertainty models of geometric elements are critically evaluated using analytical methods. Particular emphasis is placed on modeling uncertainty of line objects. The result of a case study on uncertainty assessment showed that magnitude of modeling uncertainty versus measurement uncertainty can be considerable which is usually ignored in GIS analysis.

نویسندگان

Reihaneh Batouli

Department of Surveying and Geomatic Eng., Faculty of Engineering, University of Tehran,

Mahmoud R Delavar

Department of Surveying and Geomatic Eng., Faculty of Engineering, University of Tehran,

Ali A. Alesheikh

Department of Geodesy and Geomatic Eng., Civil Engineering Faculty, K.N.T University of Technology,

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