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Experience with harvesting metadata to an Open Data Portal

Published byNikola Vítková Modified over 5 years ago

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Presentation on theme: "Experience with harvesting metadata to an Open Data Portal"— Presentation transcript:

1 Experience with harvesting metadata to an Open Data Portal
Jiří Poláček Czech Office for Surveying, Mapping and Cadastre

2 Open Spatial Data in ČÚZK
Dataset series Data format Number of datasets Cadastral Parcels INSPIRE harmonized (GML 3.2.1) 13091 Addresses 6259 Buildings Administrative Units 1 Geographical grid systems 2 Cadastral map VFK (national standard) 13185 VKM (national standard) 632 SHP DGN RÚIAN – complete dataset VFR (national standard) 12520 RÚIAN – change records 31 RÚIAN – selected records (addresses) CSV 12652 RÚIAN/ISÚI – complete dataset with history 6266 RÚIAN – special records (electoral district) Approved survey sketches Total 116526

3 Open Spatial Data in ČÚZK
Data series Data format Number of datasets Cadastral Parcels INSPIRE harmonized (GML 3.2.1) 13091 Addresses 6259 Buildings Administrative Units 1 Geographical grid systems 2 Cadastral map VFK (national standard) 13185 VKM (national standard) 632 SHP DGN RÚIAN – complete dataset VFR (national standard) 12520 RÚIAN – change records 31 RÚIAN – selected records (addresses) CSV 12652 RÚIAN/ISÚI – complete dataset with history 6266 RÚIAN – special records (electoral district) Approved survey sketches Total 116526 INSPIRE harmonized 25512 National Standard 45821 Proprietary Format 45093

4 Terminological remark
Collection of spatial data sets sharing the same product specification Dataset Serie Dataset Datasets Identifiable collection of spatial data Sections of a dataset

5 Terminological remark
Cadastral Map Dataset Serie Dataset Datasets Sections of a dataset 13091 files (1 for each cadastral unit)

6 National Open Data Portal (MVČR) European INSPIRE Geoportal (JRC) CKAN
Missing information on Datasets (file addresses) CSW National INSPIRE Geoportal (CENIA) CSW Branch Geoportal (ČÚZK)

7 Too complex task, lack of funding
National Open Data Portal (MVČR) European INSPIRE Geoportal (JRC) CKAN CSW National INSPIRE Geoportal (CENIA) Too complex task, lack of funding CSW Branch Geoportal (ČÚZK)

8 National Open Data Portal (MVČR) European INSPIRE Geoportal (JRC) CKAN
CSW National INSPIRE Geoportal (CENIA) CSW Publication Database (ČÚZK) Branch Geoportal (ČÚZK) CKAN API

9 Specification of open data in metadata
URI – link to the detailed description of the licence

10 Implementation obstacles
National Open Data Portal (MVČR) Publication Database (ČÚZK) CKAN CKAN API ATOM Map server Branch Geoportal (ČÚZK) Viewing Cadastre Application INSPIRE network services

11 Implementation obstacles
National Open Data Portal (MVČR) Publication Database (ČÚZK) CKAN CKAN API ATOM insufficient HW Map server Branch Geoportal (ČÚZK) Viewing Cadastre Application INSPIRE network services

12 Implementation obstacles
National Open Data Portal (MVČR) Publication Database (ČÚZK) CKAN CKAN API ATOM Map server Branch Geoportal (ČÚZK) Viewing Cadastre Application INSPIRE network services Database overload

13 Implementation obstacles
National Open Data Portal (MVČR) Publication Database (ČÚZK) CKAN CKAN API ATOM Metadata file cash Map server Branch Geoportal (ČÚZK) Viewing Cadastre Application INSPIRE network services

14 Open Spatial Data in ČÚZK
Data series Data format Number of datasets Cadastral Parcels INSPIRE harmonized (GML 3.2.1) 13091 Addresses 6259 Buildings Administrative Units 1 Geographical grid systems 2 Cadastral map VFK (national standard) 13185 VKM (national standard) 632 SHP DGN RÚIAN – complete dataset VFR (national standard) 12520 RÚIAN – change records 31 RÚIAN – selected records (addresses) CSV 12652 RÚIAN/ISÚI – complete dataset with history 6266 RÚIAN – special records (electoral district) Approved survey sketches Total 116526 Next day after any change Once a month Once a week Once a day

15 All the metadata has been harvested
Conclusion All the metadata has been harvested It took about 5 hours Current status : datasets metadata are harvested to the National Open Data Portal once a week Operational run : Incremental harvesting for CKAN (and some optimization) is neccesary for future Future solution : Learn CKAN to use standard CSW and implement incremental harvesting Standardize specification of open data in metadata Clear up terminology

16 Thank you for your attention
ELF workshop Stránka 16

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