1. 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, 2009 Peter Rabley and Alex Piliptchak International Land Systems (ILS), Inc

2. Copyright © 2009 International Land Systems (ILS), Inc. Cadastre Domain Model The standard model evolved to a robust model suitable for practical implementations 19982009 Cadastre 2014 CCDM LADM

3. 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)

4. 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

5. 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

6. 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

7. 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

8. Copyright © 2009 International Land Systems (ILS), Inc. STDM Similarities and Differences Feature/SectionSTDMILS PartiesGroup party class; Type, role attributes Group party class; Type, role attributes RRRSocial Tenure Relationship; Relationship type attribute Simple: Property right (with type) Complex: Fundamental property rights including tribal, family, informal rights Property Object TypesCollateralSimple: Property Object Complex: Multi-class model Address RepresentationStreet addressStreet address, Informal/descriptive address, Multiple addresses Spatial SourcesA set of survey pointsExternal representation (MC) of varying complexity Spatial RepresentationSpatial_Unit >Building >Unit Spatial_Unit >Building >Unit VersioningYes

9. 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

10. Copyright © 2009 International Land Systems (ILS), Inc. Thank you Peter Rabley, President Alex Piliptchak, ILS Senior Consultant prabley@landsystems.comprabley@landsystems.com apil@landsystems.com International Land Systems (ILS), Inc 8401 Colesville Rd, Suite 630 Silver Spring, MD 20910, USA www.landsystems.com