1. GeoNames is … Gazetteer aggregator of open geo data www.geonames.org I am... Marc Wick GeoNames

2. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 2 Gazetteer Over 7.5 million features (points) Pragmatic, useful, ease of use Cc-by licence 9 feature classes, 600 feature codes Available as extract or via web service

3. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 3

4. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 4 Attributes Name Latitude / Longitude Classification (FeatureClass>FeatureCode) Country, Administrative Divisions (<=4) Alternate Names (Endonyms/Exonyms) Population Elevation Timezone

5. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 5

6. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 6 Data Sources National Geospatial-Intelligence Agency (NGA) National Mapping Agencies (GNIS, GeoBase, …) Statistical Offices >120 sources User contributions (>14000 registered users)  Data files  Manual modifications

7. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 7 Feature Density Map

8. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 8 Trend – Open Government Data USA, later Canada, Australia,... Europe: UK, Spain, Italy, Switzerland, Denmark,... Why :  Economy  Shift from 'paper' to bytes

9. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 9 License Cc-by - 'attribution' Other open licenses:  Cc0  Public domain Not open licenses:  All 'share-alike' (odbl etc)

10. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 10 Challenges for Aggregators FeatureCodes not 1:1 non-ASCII Country codes Admin divisions Merge Apply periodic Updates Pattern matching Transliteration

11. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 11

12. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 12 Contributors Users (> 14'000 contributors):  Individuals  Companies and Organisations  Edit interface or data files Focus: Topic or Area Few do a lot Preserve contribution with periodic updates

13. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 13 Quality Assurance Validation checks while entering data User levels Consistency Checks Verification and Confirmation of relevant modifications 'many eyes'

14. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 14 Hierarchy Child Neighbour Sibling

15. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 15 Ontology – Semantic Web Ontology RDF export, 150 mio triples Linked Data

16. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 16 Applications using GeoNames thousands of applications reverse geocoding site navigation search / geo-coding

17. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 17 Webservices

18. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 18 Historic Gazetteer Codes for 'abandoned' features  Populated places  Airports Alternate names  Iso language codes  Pseudo code: fr_1793

19. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 19 ISO Codes for Historic Languages

20. GeoNames, Marc WickHistorical Gazetteers for Space-Time Integration 13. April Seattle 20 Thank you for your attention.