1. Martin Salzmann Cadastre, Land Registry and Mapping Agency of the Netherlands (Kadaster) PCC Conference, Riga, May 12-13, 2015 Evolution of the Quality of the Cadastral Map in the Netherlands: Balancing User’s demands and process optimization

2. Cadastral surveying in the Netherlands

3. Process cadastral updating

4. Development of Cadastral map 1832-1950 National coverage Separate sheets in local grid Driving force: cadastral working process Index map Main use:taxation purposes (growing share land market) Boundary information: field sheets

5. Development of Cadastral map 1950-1990 National coverage Separate sheets in national grid Cadastral improvement is driving force: - cadmap is de facto base map (buildings included) - accuracy improvement by remeasurement (technology driven; process is too expensive) Main use: taxation, land market and general use as base map Boundary information: field sheets

6. Development of Cadastral map 1990-2005 Slow introduction of (seamless) large scale topographic base map from 1974 onwards User demands driving force - Need for a nationwide seamless cadastral map - Digitization is more important than accuracy - Correspondance with base map at scale 1:1000 Main use: land market Boundary information: field sheets

7. Large scale base map of the Netherlands (lay-out 1974-2016)

8. Correspondance cadmap and basemap working procedure (reconcilliation) do not forget boundary maintain relationships declare identical reconcile graphically ditch road

9. Use of field sheets (example)

10. Development of Cadastral map 2005-future Large scale topographic map finalized 2000 (object based key-register from 2016 onwards) User demands, process integration, technology: - currency - consistency cadastral theme in combination with topomap and building and address registration - easier and direct access to boundary information - 3D - cables and pipelines (networks) - part of eGovernment information infrastructure Main use: land market and cornerstone eGovernment

11. Summary of development cadastral map 1832 1950 1970 1990 2000 2010 2020 Taxation Land market New technologies; process optimization De facto basemap User driven eGovernment

12. Feasibility study: “from good to better” increasing geometric quality and consistency “1 to 1 map” → reconstruction & viewer accurate & coordinates Field Sheets → reconstruction accurate & local relations Cadastral Map → overview and relations inaccurate & coordinates

13. Why do/could we need a better map? Better... Quality labels known Boundary reconstruction directly from map Consistency with topography/aerial imagery Surface determination directly from map Needed for... 3D & BIM networks Area current σ dist :20 cm possible σ dist : 5 cm 150 m 2 ± 5 m 2 ± 1 m 2

14. Creation of a new boundary when dividing a parcel 1832 σ = 50 cm 2015 σ = 2 cm 1976 σ = 10 cm 1910 σ = 20 cm ASSEN C 1492 12 1.22 - How to deal with inhomogeneity? - duration of updating

15. 3D Current solution: one object, several parcels right of superficies

16. Registration of networks correspondance with location of network provided by utilities?

17. Currency :Input of preliminary boundaries by professional users Notaries Housing societies Municipalities Professional users (intermediaries) become a professional crowd In future parties may survey themselves

18. Users’ participation Source: Land Information New Zealand, Cadastre 2034 http://www.linz.govt.nz/sites/default/files/docs/cadastre_strategy_web4.pdf users are connected users are accustomed to real-time access to information it seems obvious that they can also provide information

19. Concluding Remarks; balancing requirements user’s demands statutory obligations (law) technology process optimization cadastral map fit for purpose eGovernment networks 3D/BIM data integration currency public restrictions user interaction Efficiency € accuracy improvement