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Greek Cadastre Quality Model and Quality Checking of spatial cadastral data

Greek Cadastre Quality Model and Quality Checking of spatial cadastral data. Ioannis Kavadas Rural & Surveying Engineer, MSc , Ph.D . Candidate Ktimatologio S.A. Head of Project Quality Management & Control Department. Greek Cadastre Background.

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Greek Cadastre Quality Model and Quality Checking of spatial cadastral data

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  1. Greek Cadastre Quality Model and Quality Checking of spatial cadastral data IoannisKavadas Rural & Surveying Engineer, MSc, Ph.D.Candidate Ktimatologio S.A. Head of Project Quality Management & Control Department

  2. Greek Cadastre Background QKEN – Plenary meeting

  3. Greek Cadastre – background & key goals • TheGreekcadastreisbeingcreated • Expected - plannedcompletionin 2020 • Rights-based, is: • 18% complete • Municipalities: 336 (of a total of 5775) • Area: 8.738 km2 • Cadastral parcels: 1.748.795 • Properties: 3.500.824 • Rights:6.728.839 • Spatial corrections in the 8-year operation of cadastral offices: 13.500(0,8%) • 22% inimplementation(major cities) • 19% hasbeenlaunched • 41% willbelaunchedin 2012 QKEN – Plenary meeting

  4. Greek Cadastre – cadastral data acquisition (1) Thespatialcadastraldataderivedfrom: • thecadastralsurveyprocess • digitizingtheobviousmaterializedparcel boundaries onorthophotos • spatialcadastraldataareincludedinadministrativeactsafterjoiningthegeodetic referencesystemofNationalCadastre • boundariesofcoastalareasand forestareas QKEN – Plenary meeting

  5. Greek Cadastre – cadastral data acquisition (2) … location “Katsouli” of the territory of the Municipality of Salamis, not included in the urban development zones, shown with the upper case letters A-B-C-D-A on the topographic diagram that was drawn by the architect engineer E… M… and is attached to my November 19, 1993, contract, has an area of one hundred and eighty five and 90/100 (185.90) sq. meters and borders, according to the diagram, on the North and along the face C-D that has a length of fifteen and 60/100 (15.60) meters with the property of E… Ps…, on the South, along the face A-B that has a length of fifteen (15) meters with a four (4) meter wide road, on the East and along the face B-C that has a length of eleven and 80/100 (11.80) meters with a property of unknown owner, and on the West, along the face A-D that has a length of twelve and 50/100 (12.50) meters, with a four (4) meter wide road. The same land parcel is also shown… Thespatialcadastraldataderivedfrom: • verificationofspatialdatausingthedatacollectedinthecollectionofownersstatements– topographical diagrams • spatialdatafrompropertytitles (area, lengthofparcelsidese.t.c.) • participationoftheowners(indicate cp boundaries) QKEN – Plenary meeting

  6. Greek Cadastre – basic notions and key requirements • Forthecreationofspatialdata, wehaverecent (2009) andcomplete (fullcoverage) referencedata • Use of Hellenic Positioning System (HEPOS) in field measurements HEllenicPOsitioningSystemis a systemthatprovideshigh-accuracysatelite-basedreal-timepositioningservicesusingtheGlobalPositioningSystem (GPS). HEPOS consistsof 98 permanentGPS referencestations and hasbeendesignedanddevelopedby KTIMATOLOGIO S.A., witchalsooperatesthesystem.www.hepos.gr • TheGreekcadastreisbeingcreated • Everypartoflandatthemunicipallevel (includingroads, streams, specialareasetc.) arecadastralparcel • Thespatialinformationisfullyconnectedwithlegalandpropertyinformation • Involvingpropertyownersintheprocess (statements / objections) • Partially created using External Contractors • Ifdetectederrorsornonconformitiesinthedataarecorrectedbythecontractor • Themanagementofspatialdataisfullydigital QKEN – Plenary meeting

  7. Greek Cadastre General Conceptual Model QKEN – Plenary meeting

  8. Greek Cadastre – General Conceptual Model (1) Feature types Topological relationships QKEN – Plenary meeting

  9. Greek Cadastre – General Conceptual Model (2) Cadastral zoning Administrative unit Cadastral parcels QKEN – Plenary meeting

  10. Greek Cadastre – Spatial feature catalog ESRI shapefiles QKEN – Plenary meeting

  11. Greek Cadastre – Datamodelbasic requirementsandconstraints • The MNT polygons should be included in the ASTOTA polygon • The EIA polygons should be included in the ASTOTA polygon • The EIA_PNT points should be included in the ASTOTA polygon • The CBOUND polygons should be included in the ASTOTA polygon • The DBOUND polygons should be included in the ASTOTA polygon • The FBOUND polygons should be included in the ASTOTA polygon • The NOMI polygons should be included in the ASTOTA polygon • The BLOCK_PNT, POI and POL points should be included in the ASTOTA polygon • Forallcadastraldataarenotoverlappingentitieswithinthesamelayer • The ASTOTA polygon mustbecomposedentirelyof ASTTOM polygons • The ASTOTA polygon mustbecomposedentirelyof PST polygons • The ASTOTA polygon should include entirely ASTIK polygons • The ASTENOT polygons should be included in the ASTTOM polygons • The ASTIK boundariesshouldnotintersectwiththeboundariesofthe PST polygons • The VST polygons should be included in the PST polygons • The EAS polygons should be included in the PST polygons • The BLD points should be included in the ASTOTA polygon

  12. Greek Cadastre GCM vs INSPIRE GCM QKEN – Plenary meeting

  13. INSPIRE Cadastral parcels – General Conceptual Model Basic property unit + INSPIRE identifier + temporal information + national cadastral reference + area value Temporal Information + begin lifespan + end lifespan + valid from + valid to Cadastral Zoning Cadastral Parcel 0..1 Cadastral Parcel Cadastral Boundary Cadastral zoning + INSPIRE identifier + temporal information + geometry + national cadastral zoning reference + name + level (hierarchy) + level name (hierarchy) + original scale denominator + Estimated accuracy + reference point (portrayal) + label (portrayal) 0…n Cadastral parcel + INSPIRE identifier + temporal information + geometry + national cadastral reference + area value + reference point (portrayal) + label (portrayal) Cadastral boundary + INSPIRE identifier + temporal information + geometry + estimated accuracy 1..2 0..1 QKEN – Plenary meeting

  14. Greek Cadastre GCM vs INSPIRE GCM (1) PST FID KAEK PROP_TYPE ORI_TYPE ORI_CODE DEC_ID ADDRESS NUM AREA SHAPE LEN Cadastral parcels GM_Object inspireId label nationalCadastralReference - - - - - - - - - - - voidable - - - - - - - - - - areaValue referencePoint validFrom validTo beginLifespanVersion endLifespanVersion 140210914003 part of dataset Temporal information is also available 003 Cadastral diagram QKEN – Plenary meeting

  15. Greek Cadastre GCM vs INSPIRE GCM (2) ASTENOT FID CAD_ADMIN PROP_TYPE LOCALITY AREA SHAPE LEN Cadastral zoning GM_Multishape inspireId label nationalCadastralZoningReference - - - - - - - - - - - - voidable - - - - - - - - - - - - - estimateAccuracy level levelName name originalMapScaleDenominator referencePoint validFrom validTo beginLifespanVersion endLifespanVersion 140210914 part of identified in data model for every Cz dataset 09 14 Temporal information is also available Cadastral diagram QKEN – Plenary meeting

  16. Greek Cadastre Cadastral parcels Quality Model QKEN – Plenary meeting

  17. Greek QM for cadastral parcels (1) QKEN – Plenary meeting

  18. Greek QM for cadastral parcels (2) PST (Cadastral Parcel) QKEN – Plenary meeting

  19. Greek QM for cadastral parcels (3) PST (Cadastral Parcel) 1st quality evaluation method Requirement: Every part of land at the municipal level are cadastral parcel Part of qcr checklist Quality requirement: Completeness Conformance level: Absence of area gaps within the municipality boundaries Result: Accepted QKEN – Plenary meeting

  20. Greek QM for cadastral parcels (4) PST (Cadastral Parcel) 2rd quality evaluation method Key note: The spatial information is fully connected with legal and property information Part of qcr checklist Quality requirement: Completeness (spatial vs property data 1:1 identification) Conformance level: For each property record there is a corresponding cadastral parcel and vise versa Result: Not accepted Report: KAEK of non-compliant cadastral parcel QKEN – Plenary meeting

  21. Greek QM for cadastral parcels (5) PST (Cadastral Parcel) SHAPE (Geometry) Part of quality report QKEN – Plenary meeting

  22. Greek QM for cadastral parcels (6) PST (Cadastral Parcel) SHAPE (Geometry) Part of quality report QKEN – Plenary meeting

  23. Greek QM for cadastral parcels (7) PST (Cadastral Parcel) SHAPE (Geometry) QKEN – Plenary meeting

  24. Greek QM for cadastral parcels (8) PST (Cadastral Parcel)- SHAPE QKEN – Plenary meeting

  25. Greek QM for cadastral parcels (9) PST (Cadastral Parcel) SHAPE (Geometry) QKEN – Plenary meeting

  26. Greek QM for cadastral parcels (10) PST (Cadastral Parcel) 1st quality evaluation method • CompatibilityZonedefinedasthezonewhichliesbetweenborderofaninnerandanouterpolygonwithsidesparalleltothesidesofthecadastralparcel, locatedoneithersideasfollows: • Uo = 0,50m forurbanareas • Uo = 2,00m fornonurbanareas QKEN – Plenary meeting

  27. Greek QM for cadastral parcels (11) PST (Cadastral Parcel) 2nd quality evaluation method QKEN – Plenary meeting

  28. Greek QM for cadastral parcels (12) PST (Cadastral Parcel) 3rd quality evaluation method QKEN – Plenary meeting

  29. Greek QM for cadastral parcels (13) PST (Cadastral Parcel) QKEN – Plenary meeting

  30. Greek QM for cadastral parcels (14) PST (Cadastral Parcel) 2nd quality evaluation method Requirement: Every part of land at the municipal level are cadastral parcel • data inspection also for: • Presenceofblundererrorsmainlyintheshapeofparcels • Existenceofdrawing faults • Systemicmovementofparcelboundaries • Existenceofdiscontinuitiesintheentities The same evaluation method used also for the inspection of cadastral parcel completeness QKEN – Plenary meeting

  31. Conclusions • Theresultsofqualitycontrolperformedin 6 resentcontracts (33 municipalities / withnewspecifications) meetcompliancecriteriasetinthespecifications. • Toacceptthedataneeded 1 to 3 (max 5) re-submissionsbythedataproducerwithcorrectionsorclarificationsresultingfromourqualitychecking. • Theproject'ssuccessismainlybasedonfollowingfactors: • Using both the data producers and Ktimatologio S.A. detailed quality plan based on ISO 10005, • Mandatoryimplementationofinternalqualitycheckingbythedataproducer (similarwithqualitycontrolsofKtimatologio S.A.) andsubmittheirresultstousforcheckingandvalidation, • ImplementationofqualitycheckingfromtheKtimatologio S.A usingqualityplananddetailedqualitymanual, trainedstaffandspecializedsoftwareapplications, • The effectiveness of quality checking that adopted by Ktimatologio S.A., which resulted very small percentages of appeals and requests for correction by owners - avg 1% (in total of 280.781 parcels) for spatial data during the suspension of data QKEN – Plenary meeting

  32. Thank you for your attention

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