Towards a CityGML 3D Property Valuation Model based on BIM

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Towards a CityGML 3D Property Valuation Model based on BIM

El Yamani Siham, PhD student

Joint PhD - IAV Hassan II/Uliège-2019 Real Estate Valuation expert -2017 Surveying Engineer & Geomatics Science-2012

Supervisors : Pr. Rafika Hajji Pr. Roland Billen Pr. Ettarid Mohamed

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W h a t m o t i v a t e d u s ?

P r o p o s e d M o d e l

“A D E - V a l u a t i o n ”

O u r A p p r o a c h

W h a t ’s n e x t …

• 3D Modeling techniques

• Variables specifications (in/out)

• UML - Variables Model

• Why CityGML? Why BIM as an input?

• Generic Workflow

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3D Modeling techniques / Variables

Property Valuation Models/ Variables Assessment

Sunlight Exposure 3D price variation Viewshed Analysis (View Quality)

What Motivated Us?

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What Motivated Us?

Contractors/Developers

Taxation Services/ Administration

Real estate Valuers/RICS

3D Property-units Value

- As

Conceived-Indoor variables

Outdoor variables

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BIM

CIM

-

IFC-

-CityGML-Indoor variables

Outdoor variables

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Why BIM?

Indoors variables into outdoors environment Ifc open data modelProperty Cost Variables simulation (ex. Daylight, etc.)

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Why CityGML?

Extensibility

ADEs Different levels of Information content -Hierarchy -LOD Concept -3D Spatial Analysis -3D Simulations

Better

Interoperability

-NoiseADE -EnergyADE etc. CityGML 3.0 (IFC, etc.)

Generic Standard

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Our Approach

Generic Workflow

New ADE Elements Existing ADEs

+

3D DB ETL Process Thanks to mapping

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Research Tasks

3D Variables Technical Specifications

Develop CityGML ADE-Valuation

Property Valuation Model

IFC/BIM integration Model Mapping (Existing ADE, CityGML)

Implementation Phase

Model Validation

Variables Simulation Tests Variables identification Variables Requirements

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1

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Propose “ADE-Valuation’’

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Outdoor Variables

Source

Obstacle Destination

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LADM-VM Vs ADE-Valuation

LADM-VM, A. Kara, P. Van Oosterom, 2019

How far these two models could be connected ?

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What’s next?

• IFC/BIM integration Model;

• Model Validation;

• Implementation Phase (ADE/3DCityDB…);

• Eventual Collaboration? ☺

• Next Publications :

- 3D Technical Specifications - variables

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Thank You!

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Geomatics Unit | geomatics.ulg.ac.be

Allée du Six Août 19 (B5A) | 4000

Liège

[email protected]_selyamani/

Geomatics Science and Surveying Engineering Hassan II Institute of Agronomy

& Veterinary Medicine |Rabat