Design Process Using Hierarchical Spatial Reasoning Theory And Gis
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This document discusses automating the administrative boundary design process using hierarchical spatial reasoning theory and GIS. It outlines how hierarchical spatial reasoning can be applied to administrative polygons design in GIS by developing algorithms to transform flat boundary structures into hierarchical ones according to specific rules and constraints. The expected advantages of this approach include enhanced data integration, modifiable area units, boundary flexibility over time. The document concludes that it is possible to align administrative boundaries according to hierarchical spatial reasoning theory and the implemented algorithm offers a solution to automated boundary delineation.
Design Process Using Hierarchical Spatial Reasoning Theory And Gis
- 1. Automating the administration boundary design process using Hierarchical Spatial Reasoning theory and GIS Francisco Escobar Serryn Eagleson Ian Williamson
- 2. Outline Background The problem uncovered Hierarchical Spatial Reasoning (HSR) Methods to solve the problem HSR - Applied to Administrative Boundaries Conclusion
- 3. The Problem Throughout history boundaries have been used to divide the space around us into administrative units In the majority of cases these boundaries have been established to facilitate administrative, political and economic purposes
- 4. North West Melbourne Health Division Collector District N 3 0 3 6 Km Postcode
- 6. The problem
- 7. Research Objective To identify the principles of Hierarchical Spatial Reasoning and apply them to Administrative polygons design using GIS
- 8. Possible solutions Aggregation - current Interpolation - current Reorganisation - proposed
- 10. Interpolation Process Data Interpolation Formula V t = U s (a st / a st ) Errors
- 13. Hierarchical Spatial Reasoning Hierarchies have been used to break down a number of complex problems Quadtrees, Route Planning Properties Janus Effect Whole Part Near decomposability
- 14. Hierarchical Model Cadastre Mesh Block agency 1 agency 2 agency 3
- 15. Implementing HSR theory Method to transform the ‘flat’ structure into an equivalent hierarchical structure Rules to reason on the structure Performance analysis in comparison to the non-hierarchical structure. (Timpf and Frank 1997)
- 16. Expected Advantages Enhanced Data Integration Modifiable Area Unit Boundary flexibility Analysis over time
- 17. Selected Agencies Australian Bureau of Statistics (ABS) Census Collection District (CCD) Australia Post (AP) Postcode
- 18. Boundary Constraints Confidentiality Topography Contiguity Shape
- 19. Model Development Aggregation based on attributes If (constraints are met) then add the Polygon to selection else Do Not end Union.Selected
- 21. Algorithm Development Data Input Is freq < constraint Select Adjacent Polygons Select Initial Polygon Is counter = total Sort by shape Warning Increment counter Calculate circularity Is circularity < 0.5 Quality Report
- 22. Future Models Interactive Boundary Design Thematic and Spatial Aggregation Christaller’s space to boundaries Existing Boundary Infrastructure
- 23. Thiessen Polygons - (Martin, 1991 & Openshaw, 1992) Spatial selection approach
- 24. Conclusion It is possible to align administrative boundaries according to HSR theory The implemented algorithm offers a solution to the problem of boundary delineation and provides the means for accurate data exchange
- 25. Further Research Rural environments Shape HSR properties for boundaries