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European Contribution to UN Geographic Database: Enhancing Collaboration and Data Maintenance

Learn about the European Union's efforts in geospatial data management, focusing on harmonization, metadata, and seamless boundaries. Explore the achievements and ongoing activities of CERCO and MEGRIN, highlighting the need for collaboration and maintenance in UN geo-databases.

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European Contribution to UN Geographic Database: Enhancing Collaboration and Data Maintenance

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  1. a potential European contribution to the UN geo-DBclaude.luzet@ megrin .org

  2. Who are we? • grouping(s) of European NMAs • Comité Européen des Responsables de la Cartographie Officielle • Multipurpose European Ground-Related Information Network

  3. Why do we exist? • All NMAs have common concerns technical, organisational, legal, etc… a discussion and exchange platform CERCO since 1979 • Increasing cross-boarder issues dedicated and permanent resources business-like structure MEGRIN since 1993

  4. resources • annual budget ~€1 million • 70% members financial subscriptions • coordination unit • Marne-la-Vallée (Paris-France) • 4~7 people • distributed resources

  5. our experience • national datasets are not interoperable • technical differences • format, standard, co-ordinate system, … • semantics, language, ... • policy differences • access rights, price policy, ... >>> need for harmonisation mechanisms

  6. membership MEGRIN

  7. membership CERCO + MEGRIN CERCO

  8. membership CERCO + MEGRIN CERCO CERCO observers

  9. L’Europe des 15 European Union member countries

  10. Achievements and on-going activities • (CERCO) Working Groups • R&D projects • metadata : GDDD - LaClef • admin.boundaries : SABE • 1:250 000 : EuroMap • 1:1 million : MapBSR & Global Map

  11. metadata • the current GDDD (since 1995) • harmonised description of 360 ‘digital maps’ • the future LaClef/EuroMapFinder • “unlocking public sector information” • operational by Dec. 2000 • fully multilingual • distributed system • XML exchange protocol • wide product range • e-commerce

  12. SABE : Seamless Administrative Boundaries of Europe Current version • official national data • 26 countries, ~100 000 polygons • geometrically and semantically harmonised • single licence • maintained : ‘91, ‘95, ‘97, 2001, (continuous?)

  13. SABE Current version added2000

  14. SABE Current version Negotiation for 2001

  15. EuroMap 250 Vmap level 1 remote from actual demand Class 1: EUROMAP prototype Class 2: EUROMAP extended with product 1 and external funding issues resolved

  16. Current assessment • our assets • the organisational structure • 10 year trans-national experience • actual concrete achievements • obstacles • politician/deciders awareness : no EU GI policy • funding : insufficient to continue on our own

  17. Ex. DG13 several GI initiatives …. But no GI strategy or policy

  18. ETeMII E.G.I.I. • European Territorial Management Information Infrastructure • Aims • To organise a network of excellence • To build consensus on technical issues • To raise awareness

  19. 7 Work-packages • 1 - Project management • 2 - User’s requirements • 3 - Reference data • 4 - Metadata • 5 - Standards, interoperability • 6 - Dissemination • 7 - Assessment and evaluation

  20. Main aim: To reach a technical consensus on the definition of reference data at European level, at global level (GSDI) To address data policy issues Focus on minimum spec. for reference data, main users: medium scales the existing situation WP3 - Reference data

  21. Global Map • Phase one • starts with existing global datasets • locally updated by NMA • Internet distribution starts end 2000 • Phase two • integration of national datasets • flexible scale/resolution • legal framework and commercial exploitation

  22. MapBSR • 1:1 million topo database • pan-European extension? • contribution to Global Map?

  23. Conclusions • Extensive Geographic Information projects needs multi-year planning • Source-data is not interoperable • Data maintenance is critical • Data sources and quality are generally difficult to assess >>>> collaboration is the sensible approach

  24. Lack of resources and of policies Obstacles : not technical

  25. and drivers • clear policies contribute to: • collaboration, co-ordination • reduced costs (no duplication) • consistent information (common references) & attracts resources

  26. suggestionsfor the UN geo-DB

  27. Alice’s two keywords COLLABORATION MAINTENANCE

  28. Risks • Information not the same • at global (and UN) level • at regional (eg. European) level • at national (government) level • in commercial products • Maintenance duplicated • at all levels • at different scales

  29. Suggested action plan • 1. Reference data • centrally stored, used by all • 2. Cataloguing • UN system data and GIS related projects • links to other metadata resources • 3. Co-ordination and agreements • internal to UN system • with NMAs, other (official) data owners • distributed databases

  30. UN ‘reference’ data(base) • reference-data, core-data, base-data or fundamental data • is NOT all the data needed ... • but the common data needed by most (UN) users • should be (relatively) scale-free • today’s technology allowing on-the-fly feature selection/generalisation • therefore higher available accuracy/resolution?

  31. Ref.data : suggested steps 1. Assess UN various internal needs 2. Define a common “reference data” - in co-ordination with other initiatives 3. Use current global/regional initiatives 4. Support filling out gaps - emerging regional initiatives - harmonisation initiatives - data developments

  32. Number 1 best candidate • administrative boundaries • international boundaries • lowest (communal) administrative units • harmonised hierarchies (cf. EUROSTAT) • names (multilingual) • unique identifiers (cf. EUROSTAT) • additional key features • coast-line, ‘big’ lakes • other land use, natural parks, ...

  33. Second bests • population, settlements • transport & infrastructure • road network, tunnels, bridges, ... • rail, stations, ... • water-ways, harbours, ... • airport/airfields, ... • power lines, ... • DEM

  34. An issue ... flexible & incremental implementation vs. semantic & topological consistency

  35. a second issue quality, richly attributed object oriented vector database, but rapidly aging vs. (or combined) up-to-date information-poor raster images

  36. … a necessity ... Think big (and medium term) and start small (and fast)

  37. …and a citation “The UN can do little on its own” quoted by Mr. Kensaku Hogen consider collaboration and agreements with main source-data providers (NMAs, …) and their global or regional groupings (already harmonised datasets)

  38. UN Carto.section and GM • Start with the existing • avoid duplication (globally & nationally) • ensure interoperability • ensure sustainability • Build on the existing • availability vs. needs • plan for incremental evolution • collaborate with and support global/regional/national relevant initiatives

  39. GSDI Global Map UN geoDB PCGIAP MEGRIN Industry NMA PC-Americas NMA NMA NMA NMA NMA NMA NMA

  40. Thank you Merci http://www.megrin.org

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