geonames is … gazetteer aggregator of open geo data i am... marc wick geonames

GeoNames is …Gazetteer

aggregator of open geo datawww.geonames.org

I am ...Marc Wick

GeoNames

GeoNames, Marc Wick Historical Gazetteers for Space-Time Integration 13. April Seattle

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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


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Attributes

Name Latitude / Longitude Classification (FeatureClass>FeatureCode) Country, Administrative Divisions (<=4) Alternate Names (Endonyms/Exonyms) Population Elevation Timezone


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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


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Feature Density Map


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Trend – Open Government Data

USA, later Canada, Australia, ... Europe: UK, Spain, Italy, Switzerland,

Denmark,...

Why : Economy Shift from 'paper' to bytes


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License

Cc-by - 'attribution' Other open licenses:

Cc0 Public domain

Not open licenses: All 'share-alike' (odbl etc)


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Challenges for Aggregators

FeatureCodes not 1:1 non-ASCII Country codes Admin divisions

Merge Apply periodic

Updates

Pattern matching Transliteration


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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


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Quality Assurance

Validation checks while entering data User levels Consistency Checks Verification and Confirmation of relevant

modifications 'many eyes'


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Hierarchy

Hierarchy Child Neighbour Sibling


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Ontology – Semantic Web

Ontology RDF export, 150 mio triples Linked Data


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Applications using GeoNames

thousands of applications reverse geocoding site navigation search / geo-coding


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Webservices


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Historic Gazetteer

Codes for 'abandoned' features Populated places Airports

Alternate names Iso language codes Pseudo code: fr_1793


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ISO Codes for Historic Languages

arc arc Official Aramaic (700-300 BCE)

ell Modern Greek (1453-)Middle English (1100-1500)

fro fro

Ancient Greek (to 1453)Middle Irish (900-1200)

oar Old Aramaic (up to 700 BCE)

Middle Korean (10th-16th cent.)Old Korean (3rd-9th cent.)Ottoman Turkish (1500-1928)

pro pro Old Provençal (to 1500)Old Irish (to 900)

ang ang Old English (ca. 450-1100)

dum dum Middle Dutch (ca. 1050-1350)el elenm enmfrm frm Middle French (ca. 1400-1600)

Old French (842-ca. 1400)gmh gmh Middle High German (ca. 1050-1500)goh goh Old High German (ca. 750-1050)grc grcmga mga

oci oci oc Occitan (post 1500)okmokoota otapeo peo Old Persian (ca. 600-400 B.C.)

sga sgatmr Jewish Babylonian Aramaic (ca. 200-1200 CE)


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Thank you for your attention.

geonames is … gazetteer aggregator of open geo data i am... marc wick geonames

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