1. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 1 Conception and multi-sources enrichment of significant features for a multi-purpose cadastre UMR ESPACE 6012 - Montpellier - France & CIRAD-TERA Jean-Paul CHEYLAN (Dr) David LEVREL (Doctoral student)

2. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 2 Cadastre and multi-purpose cadastre, a set of products It ’s appear that cadastral map is useful in different ways, for different purposes leading to very different needs and specifications (Dale:http://sunspot.sli.unimelb.edu.au/research/cad_anthology/article/artic2.htm) Asset management conveyancing credit security demographic analysis environmental impact assessment Land and property ownership land reforme, physical planning public communications site location land market analysis etc...

3. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 3 Urban planning and management Natural space management Agricultural space management Geographic space Urban growth diagnostic and monitoring Precision and high quality agriculture Leisure Biological diversity Pastoralism The main thematic and space division

4. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 4 Multi-sources based (Cadastre, GPS measures, aerial photography, ortho photography, remote sensing imagery, thematic maps data sets…) different needs, different and overlapping specifications A family of products Adapted to different uses overlaying in space, time and content The conception must be context dependent in UrbanAgriculturalNatural space

5. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 5 Common reconception criteria Semantical, physionomical, functional, protocol based Main features specification spatial extent consistence of features semantic as protocol product borders ‘bodies’

6. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 6 Agricultural space Cadastral parcels delineate most of the significant cultural parcels Relationship : cadastral parcels - cultural (physionomical) Ownership VS use management Borders ‘thickness’ Status, structure, content As boundaries accuracy indicator Morphological significance Shape, area, …division history Functional significance ditch, trench, drainage structures, bank and ramp, cultural service tracks.

7. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 7 Infra-red colored image shot date : 24/08/92 scale : 1/17 000 spatial resolution : 50 cm Urban space Agricultural space Natural space North 0 500 m Lauret Claret Agricultural space Our study area : Lauret district

8. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 8 Cadastral layer cadastralp arcel 1 0170 m0 0 This physical border does not have any legal existence 0170 m vineyard Annual crop Agricultural space case 1 : the image enrich the cadastral plan

9. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 9 Cadastral layer 0170 m Cadastral parcel 2 0170 m This cadastral parcel edge does not have any physical reality Agricultural space case 2 : the cadastral plan enrich the image

10. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 10 Cadastral layer 0170 m Cadastral parcel 3 0170 m Agricultural space case 3 : significant inscription of cadastral parcels in the image This set of cadastral parcels fit with cultural parcel set

11. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 11 Infrared colored image shot date : 24/08/92 spatial resolution : 24 cm Cultural service track bank ditch Structure and content of border thickness Discrimation of significant technical features with aerial phography

12. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 12 Built-up, urban, future urban spaces Most of the borders are significant some borders don’t have physionomical inscription some observable border don’t have cadastral counterpart Recognise and delineate significant land cover parcels (built up area, urban vegetation spaces, body of the circulation infrastructures) as planning features. - Recognise different meaning of ‘parcel’ links between elementary spatial objects (buildings, open private spaces, open public spaces, yards, etc.) - Recognise significant buildings (using inaccurate resolution) their complex relations to cadastral parcels (multi-parcels building, multi-buildings parcels)

13. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 13 Body of traffic infrastructures "Street bodies" : Public, non cadastral space Street body

14. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 14 Body of traffic infrastructures "Street bodies" : Public management Public management

15. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 15 Body of traffic infrastructures "Street bodies" : Functional bodies Functional bodies

16. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 16 Urban vegetation delineation Urban vegetation

17. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 17 “Natural” space (space of the spontaneous vegetation dynamics) Cadastral parcels have few significant inscription Cadastral parcels are used as locational source in conjunction with aerial photographs -able to give some part of significant features forestery tracks (with partial cadastral concordance) -able to give physionomical bodies hypothesis formers land cover history

18. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 18 Old forest cut Cadastral parcel Forestery tracks "Natural space" (Space of the spontaneous vegetation dynamics)

19. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 19 Quality derivation The spatial accuracy needs: preliminary..and unsatisfied condition ! from centimetre (facilities management) to decimetre (agricultural space) to metre and Dm. (natural space) Availability (in France) In 70% of the space cm. Orthophoto Not available, special order dm. Orthophoto Not available, special precessing Dm. Orthophoto Not available, special precessing 2-4 Dm. OrthoimageAvailable Is a progressive accuracy refinement tractable?

20. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 20 Perspectives Revisions, derivation and enrichments Revision Choice between borders perception Spatially non-monotone: i.e. in agricultural space, generally ditch or banks denote a cadastral boundary in natural space textural strong edges could inform about former valorisation of the space

21. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 21 Derivation i.e. finding different parts of an urban parcel : compactness index combination of adjacent elementary objects approximating the known total area

22. Data fusion and separation meeting - Carnuntum, Austria, 24-26 June 2001 22 Enrichment Enrichment of the attribute lancover, landuse, drainage and irrigation networks Graphical and geog. side (positionning, spatial accuracy Consistency and coherence problems Some inconsistent situations are legal Non-destructive enrichment seems to be more appropriated