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GeoNames

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

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GeoNames

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

  2. Historical Gazetteers for Space-Time Integration 13. April Seattle 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. Historical Gazetteers for Space-Time Integration 13. April Seattle

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

  5. Historical Gazetteers for Space-Time Integration 13. April Seattle

  6. Historical Gazetteers for Space-Time Integration 13. April Seattle 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. Historical Gazetteers for Space-Time Integration 13. April Seattle Feature Density Map

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

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

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

  11. Historical Gazetteers for Space-Time Integration 13. April Seattle

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

  14. Hierarchy • Hierarchy • Child • Neighbour • Sibling Historical Gazetteers for Space-Time Integration 13. April Seattle

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

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

  17. Webservices Historical Gazetteers for Space-Time Integration 13. April Seattle

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

  19. Historical Gazetteers for Space-Time Integration 13. April Seattle ISO Codes for Historic Languages

  20. Historical Gazetteers for Space-Time Integration 13. April Seattle Thank you for your attention.

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