Decision Support in Uncertain Real Estate Transactions
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Decision Support in Uncertain Real Estate Transactions Judgment Under Uncertainty Related to Real Estate Transactions in Everyday Life Supported by Open Source GIS Tools Dr. György Szabó 1 – Ervin Wirth 2 1 associate professor, University of Technology and Economics, Department of Photogrammetry and Geoinformatics,
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In this presentation we demonstrate the judgment of everyday users under uncertain conditions in the field of real estate transactions. We are going to lead the reader during the World of open source environment in a practical example. The used components will be PostgreSQL, Octave, OSM data, QGIS, Google Maps API, Apache and different web languages. The main goal is decision support in real estate business. It’s based on fuzzy logic, which is a widely used many-valued logic mathematical method nowadays. Presented by György Szabó, associate professor, University of Technology and Economics, Department of Photogrammetry and Geoinformatics
Transcript of Decision Support in Uncertain Real Estate Transactions
Decision Support in Uncertain Real Estate Transactions Judgment Under Uncertainty Related to Real Estate Transactions in Everyday Life Supported by Open Source GIS Tools
Dr. György Szabó1 – Ervin Wirth2
1 associate professor, University of Technology and Economics, Department of Photogrammetry and Geoinformatics, e-mail: [email protected] lecturer, University of Technology and Economics, Department of Photogrammetry and Geoinformatics, e-mail: [email protected]
Metadata
• Open source elements• User-friendly• Browsing for real estate on map• Risk calculation - Fuzzy logic
Problem recognition• difficulty of buying an apartment• absence of necessary knowledge• mistakes are not allowed• once in a lifetime
Analysis• create knowledge base• calculate indicators
Definition• mapping of properties• deliberation, separation• ranking
Synthesis• create sample database• categorize results
A layout, Kosztolányi Dezső Square
Advertisement
Risk calculating
Web server
Delete advertisement
Browsing
For sale
For rent
Query with parameters
Display on map
Tabular browsing
Origin of spatial data
• Open Street Map (OSM) project which purpose to create a free editable map of the world
• Geofabrik (Karlsruhe)they provide up-to-date derived data from OSM for free download (.shp)
• Open Database License 1.0. data for any purpose, acknowledge OpenStreetMap as the data source
• The used layer: buildings.shp (WGS84)
Pack of EnterpriseDB
Shape file
QGIS Dufour
DB Manager of QGIS Dufour
PostgreSQL (PostGIS)
An overview of the combination of languages
Apartment area
Mamdani Inference
Facility of heat the apartment
Comfort
Modernity
Heating technology
Wall thickness
Main building material
Window surface
Levels of building
Level of apartment
Building age
Insulation
Our fuzzy inference system (FIS)
IN
PUT
SID
E O
UTPU
T SIDE
Graphical representations of Ceiling height fuzzy set
A basic sample• IF ceiling height is average THEN heating difficulty is medium• IF ceiling height is high THEN heating difficulty is hard
Lighting [%] Wall thickness [cm]
Insu
latio
n
Apartment area [m2] Ceiling height [cm]
Fa
cilit
y of
hea
ting
Thank you !
