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133 lines
4.4 KiB
Markdown
133 lines
4.4 KiB
Markdown
## Reverse Geocoding
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Reverse geocoding generates an address from a latitude and longitude. The optional `zoom` parameter specifies the level of detail required in terms of something suitable for a Leaflet.js/OpenLayers/etc. zoom level.
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### Parameters
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```
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https://nominatim.openstreetmap.org/reverse?<query>
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```
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* `format=[xml|json|jsonv2]`
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* Output format.
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* `jsonv2` adds the next fields to response:
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* `place_rank`
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* `category`
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* `type`
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* `importance`
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* `addresstype`
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* `json_callback=<string>`
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* Wrap json output in a callback function (JSONP) i.e. `<string>(<json>)`
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* `accept-language=<browser language string>`
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* Preferred language order for showing search results, overrides the value specified in the "Accept-Language" HTTP header.
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* Either uses standard rfc2616 accept-language string or a simple comma separated list of language codes.
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* `osm_type=[N|W|R]` `osm_id=<value>`
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* A specific osm node / way / relation to return an address for
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* **Please use this in preference to lat/lon where possible**
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* `lat=<value>` `lon=<value>`
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* The location to generate an address for
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* `zoom=[0-18]`
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* Level of detail required where `0` is country and `18` is house/building
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* `addressdetails=[0|1]`
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* defaults to 0
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* Include a breakdown of the address into elements
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* `email=<valid email address>`
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* If you are making large numbers of request please include a valid email address or alternatively include your email address as part of the User-Agent string.
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* This information will be kept confidential and only used to contact you in the event of a problem, see [Usage Policy](https://operations.osmfoundation.org/policies/nominatim/) for more details.
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* `polygon_geojson=1`
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* Output geometry of results in geojson format.
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* `polygon_kml=1`
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* Output geometry of results in kml format.
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* `polygon_svg=1`
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* Output geometry of results in svg format.
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* `polygon_text=1`
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* Output geometry of results as a WKT.
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* `extratags=1`
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* Include additional information in the result if available, e.g. wikipedia link, opening hours.
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* `namedetails=1`
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* Include a list of alternative names in the results.
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* These may include language variants, references, operator and brand.
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### Example
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* [https://nominatim.openstreetmap.org/reverse?format=xml&lat=52.5487429714954&lon=-1.81602098644987&zoom=18&addressdetails=1](https://nominatim.openstreetmap.org/reverse?format=xml&lat=52.5487429714954&lon=-1.81602098644987&zoom=18&addressdetails=1)
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```xml
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<reversegeocode timestamp="Fri, 06 Nov 09 16:33:54 +0000" querystring="...">
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<result place_id="1620612" osm_type="node" osm_id="452010817">
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135, Pilkington Avenue, Wylde Green, City of Birmingham, West Midlands (county), B72, United Kingdom
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</result>
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<addressparts>
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<house_number>135</house_number>
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<road>Pilkington Avenue</road>
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<village>Wylde Green</village>
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<town>Sutton Coldfield</town>
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<city>City of Birmingham</city>
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<county>West Midlands (county)</county>
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<postcode>B72</postcode>
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<country>United Kingdom</country>
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<country_code>gb</country_code>
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</addressparts>
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</reversegeocode>
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```
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##### Example with `format=jsonv2`
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* [https://nominatim.openstreetmap.org/reverse?format=jsonv2&lat=-34.44076&lon=-58.70521](https://nominatim.openstreetmap.org/reverse?format=jsonv2&lat=-34.44076&lon=-58.70521)
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```json
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{
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"place_id":"134140761",
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"licence":"Data © OpenStreetMap contributors, ODbL 1.0. http:\/\/www.openstreetmap.org\/copyright",
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"osm_type":"way",
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"osm_id":"280940520",
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"lat":"-34.4391708",
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"lon":"-58.7064573",
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"place_rank":"26",
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"category":"highway",
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"type":"motorway",
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"importance":"0.1",
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"addresstype":"road",
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"display_name":"Autopista Pedro Eugenio Aramburu, El Triángulo, Partido de Malvinas Argentinas, Buenos Aires, 1.619, Argentina",
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"name":"Autopista Pedro Eugenio Aramburu",
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"address":{
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"road":"Autopista Pedro Eugenio Aramburu",
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"village":"El Triángulo",
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"state_district":"Partido de Malvinas Argentinas",
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"state":"Buenos Aires",
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"postcode":"1.619",
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"country":"Argentina",
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"country_code":"ar"
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},
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"boundingbox":["-34.44159","-34.4370994","-58.7086067","-58.7044712"]
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}
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```
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### Hierarchy
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* Admin level => XML entity
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* 2 => `<country>`
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* 4 => `<state>`
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* 5 => `<state_district>`
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* 6
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* 7 => `<county>`
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* 8 => `<village>`
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* 9 => `<city_district>`
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* 10 => `<suburb>`
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