copyright © 2009 international land systems (ils), inc. land governance in support of the mdgs:...
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Copyright © 2009 International Land Systems (ILS), Inc.
LAND GOVERNANCE IN SUPPORT OF THE MDGS: RESPONDING TO NEW CHALLENGES
The Social Tenure Domain Model: From Concept to Implementation
The World Bank, Washington DC
March 11, 2009Peter Rabley and Alex PiliptchakInternational Land Systems (ILS), Inc
LAND GOVERNANCE IN SUPPORT OF THE MDGS: RESPONDING TO NEW CHALLENGES
The Social Tenure Domain Model: From Concept to Implementation
The World Bank, Washington DC
March 11, 2009Peter Rabley and Alex PiliptchakInternational Land Systems (ILS), Inc
Copyright © 2009 International Land Systems (ILS), Inc.
Cadastre Domain Model
• The standard model evolved to a robust model suitable for practical implementations
1998 2009
Cadastre 2014
CCDM
LADM
Copyright © 2009 International Land Systems (ILS), Inc.
Land Administration Model (LADM)
• Information model and conceptual schema– parties – parcels– rights, responsibilities, and restrictions – spatial sources (surveys)– spatial representations (geometry)
• Terminology• Country Examples• Social Tenure Data Model (STDM)
Copyright © 2009 International Land Systems (ILS), Inc.
LADM Strength and Weakness
Comprehensive core model Versioning and dynamic aspects Robust support for spatial representations Coherent linkage to external sources Terminology Fundamental property rights
Copyright © 2009 International Land Systems (ILS), Inc.
Social Tenure Model (STDM)
• A specialization of LADM– Relationships between people and land– Limited cadastral coverage
• Different terminology• Simplified core classes
Copyright © 2009 International Land Systems (ILS), Inc.
ILS LRS and MultiCadastre
• A common data model– LRS
• parties • parcels• rights, responsibilities, and restrictions
– MC• spatial sources (surveys)• spatial representations (geometry)
• Evolved through assimilation of multiple regional and national models
LRS
MC
Copyright © 2009 International Land Systems (ILS), Inc.
Typical Implementations
• Different levels of specialization– Simple (DSS/MC)
• Limited specialization of RRR classes• Limited versioning (not all objects are
versioned)• Optional spatial representation
– Complex (LRS/MC)• Full spectrum of RRR classes and related
application logic• Full versioning
Copyright © 2009 International Land Systems (ILS), Inc.
STDM Similarities and DifferencesFeature/Section STDM ILS
Parties Group party class;Type, role attributes
Group party class;Type, role attributes
RRR Social Tenure Relationship;Relationship type attribute
Simple: Property right (with type)Complex: Fundamental property rights including tribal, family, informal rights
Property Object Types Collateral Simple: Property ObjectComplex: Multi-class model
Address Representation Street address Street address,Informal/descriptive address,Multiple addresses
Spatial Sources A set of survey points External representation (MC) of varying complexity
Spatial Representation Spatial_Unit >Building >Unit
Spatial_Unit >Building >Unit
Versioning Yes Yes
Copyright © 2009 International Land Systems (ILS), Inc.
Summary
• LADM has matured and ready for practical implementations though some issues may still need to be improved
• STDM specialization of LADM is similar in many aspects to the models implemented by ILS
Copyright © 2009 International Land Systems (ILS), Inc.
Thank you
Peter Rabley, PresidentAlex Piliptchak, ILS Senior Consultant
[email protected] [email protected]
International Land Systems (ILS), Inc
8401 Colesville Rd, Suite 630
Silver Spring, MD 20910, USA
www.landsystems.com