1. Land Administration Domain Model (LADM, ISO 19152) Spatial Unit Package and Spatial Profiles
Peter van Oosterom
ISO/TC211, LADM workshop, Québec,Canada, 4 November 2009

2. Content Introduction Spatial Unit Spatial Representation/Survey
Spatial profiles
Conclusion

3. ISO 19152 Scope reference model (abstract, conceptual schema)
land/water, below/above surface
basic classes: (1) parties, (2) rights, responsibilities, and restrictions, (3) spatial units, (4) spatial sources, and (5) spatial representations
terminology enabling communication
shared description of formal or informal practices
basis for national, and regional profiles (application schema)
blueprint stereotype for classes in external databases: person, address, data, data, and taxation data
no interference with (national) land administration laws

4. LADM core: new name LA_BAUnit
explicit modeling ‘real estates’; e.g. LA_Party Peter has LA_RRR ownership on LA_BAUnit Peter’s estate consisting of 2 LA_SpatialUnit parcels (with same LA_RRR)
LA_BAUnit stands for Basic Administration Unit

5. Content Introduction Spatial Unit Spatial Representation/Survey
Spatial profiles
Conclusion

6. LA_SpatialUnit (alias LA_Parcel)
LA_SpatialUnit specializations: network, building unit
organized in LA_Layer based on structure or content
5 types: point, text (unstructured) line, polygon, and topology
2D and 3D integrated without complicating 2D

9. Content Introduction Spatial Unit Spatial Representation/Survey
Spatial profiles
Conclusion

10. Spatial Representation and Survey subpackages of SpatialUnit
Geometry, topology of Spatial Units (based ISO 19107)
Spatial source (based ISO/CD Observations and Measurements)

11. 2D and 3D integration
observation: 2D description implies 3D prismatic volume
2D polyline (GM_curve) implies string of vertical faces

12. 2D and 3D integration
2D polyline (GM_curve) implies string of vertical faces: LA_BoundaryFaceString
true 3D described with arbitrary oriented faces: LA_BoundaryFace

13. Code lists Typical example values Not limited to given values
Can be extended in country profiles

14. 2D and 3D integration
between 2D and 3D spatial unit transition via liminal spatial units

15. Introduction of LA_Layer
organization based on content or structure:
example 1, content-based: one layer with ‘primary’ (strongest) rights, another layer with rights that can be added/subtracted (e.g. restrictions)
example 2, structure-based: one layer with topologically structured parcels (one part of the country), another layer with (unstructured) line based parcels (other part of country)
can also be used in 3D context: one layer ‘normal’ parcels, another layer with subtracted 3D parcels
based on independence principle
each country design own layers

16. Content Introduction Spatial Unit Spatial Representation/Survey
Spatial profiles
Conclusion

17. ISO 19152 Annexes Abstract Test Suite Social Tenure Domain Model
Instance Level Cases
Country Profiles
Spatial Profiles
Legal Profiles
LADM and INSPIRE (Cadastral Parcels)
LADM and LPIS (Agricultural Parcels)

18. Spatial profiles fill-in the options
Text
Point
Unstructured line
Polygon
Topology 2D 3D
Mixed
 Gives 5 times 3 options (15 in total), now 3 examples

19. Point based (2D) The following classes should be omitted
LA_BoundaryFaceString;
LA_BoundaryFace

20. Unstructured line based (2D)
The following classes should be omitted
LA_BoundaryFaceString

21. Examples from the Queensland DCDB
Original boundaries
No splitting
Compact

22. Topology based (3D) The following class is omitted
LA_BoundaryFaceString

23. Content Introduction Spatial Unit Spatial Representation/Survey
Spatial profiles
Conclusion

24. Conclusion
Spatial Unit is one package with two subpackages (Survey and Spatial Representation)
Spatial Units are universal in their land administration application (ownership, easement, utilities, building,..)
Range of representations: text  3D topology
Based on other ISO standards ISO19107 and ISO19156
Integrate 2D and 3D representations