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

Content Introduction Spatial Unit Spatial Representation/Survey Spatial profiles Conclusion

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

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

Content Introduction Spatial Unit Spatial Representation/Survey Spatial profiles Conclusion

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

Content Introduction Spatial Unit Spatial Representation/Survey Spatial profiles Conclusion

Spatial Representation and Survey subpackages of SpatialUnit Geometry, topology of Spatial Units (based ISO 19107) Spatial source (based ISO/CD 19156 Observations and Measurements)

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

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

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

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

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

Content Introduction Spatial Unit Spatial Representation/Survey Spatial profiles Conclusion

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)

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

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

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

Examples from the Queensland DCDB Original boundaries No splitting Compact

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

Content Introduction Spatial Unit Spatial Representation/Survey Spatial profiles Conclusion

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