Nominatim

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Nominatim is a piece of open source software and a hosted instance based on OpenStreetMap data for geocoding and reverse geocoding, for example deriving coordinates from a physical address or vice versa.

It is a useful service for implementing location-aware applications.

Nominatim interactive UI:

• http://nominatim.openstreetmap.org/

Documentation:

• https://wiki.openstreetmap.org/wiki/Nominatim

How to

How to get mf2 data from Nominatim

How to derive microformats2 data from Nominatim responses:

Given response data from Nominatim:

• let adr be the value of the address key in data
• derive the following microformats2 h-adr/h-geo/h-card properties from adr:
  • street-address from adr.road or null
  • extended-address from adr.suburb or null
  • locality from adr.hamlet or adr.village or adr.town or adr.city or null
  • country-name from adr.country or null
  • postal-code from adr.postcode or null
  • country-code from adr.country_code or null
  • if adr.country_code is 'us':
    • derive region from adr.state or adr.county
    • otherwise: derive region from adr.county or adr.state

IndieWeb Examples

IndieWebCamp Attendees using Nominatim:

• Tom Morris
• Barnaby Walters to go from lat/long data to address data in notes with location data/“checkins”
• David Shanske uses nominatim for reverse lookup, with a fallback on other services, due an occasional lockout.
• …

See Also

• location
• checkin
• OpenStreetMap
• h-adr