Merge pull request #3580 from lonvia/about-ai-prs

[nominatim.git] / docs / api / Lookup.md

diff --git a/docs/api/Lookup.md b/docs/api/Lookup.md
index 937292623f60c58ff1cb45882d09002a64bd08d3..bed01275ecb721f8019460b2b307799b7fc7409e 100644 (file)
--- a/docs/api/Lookup.md
+++ b/docs/api/Lookup.md
@@ -3,7 +3,7 @@
 The lookup API allows to query the address and other details of one or
 multiple OSM objects like node, way or relation.
 
 The lookup API allows to query the address and other details of one or
 multiple OSM objects like node, way or relation.
 

-## Parameters
+## Endpoint

 
 The lookup API has the following format:
 
 
 The lookup API has the following format:
 


@@ -15,86 +15,140 @@ The lookup API has the following format:
 prefixed with its type, one of node(N), way(W) or relation(R). Up to 50 ids
 can be queried at the same time.
 
 prefixed with its type, one of node(N), way(W) or relation(R). Up to 50 ids
 can be queried at the same time.
 

-Additional optional parameters are explained below.
+!!! danger "Deprecation warning"
+    The API can also be used with the URL
+    `https://nominatim.openstreetmap.org/lookup.php`. This is now deprecated
+    and will be removed in future versions.
+
+
+## Parameters
+
+This section lists additional optional parameters.

 
 ### Output format
 
 
 ### Output format
 

-* `format=[xml|json|jsonv2|geojson|geocodejson]`
+| Parameter | Value | Default |
+|-----------| ----- | ------- |
+| format    | one of: `xml`, `json`, `jsonv2`, `geojson`, `geocodejson` | `jsonv2` |
+
+See [Place Output Formats](Output.md) for details on each format.

 
 

-See [Place Output Formats](Output.md) for details on each format. (Default: xml)

 
 

-* `json_callback=<string>`
+| Parameter | Value | Default |
+|-----------| ----- | ------- |
+| json_callback | function name | _unset_ |
+
+When given, then JSON output will be wrapped in a callback function with
+the given name. See [JSONP](https://en.wikipedia.org/wiki/JSONP) for more
+information.

 
 

-Wrap JSON output in a callback function (JSONP) i.e. `<string>(<json>)`.

 Only has an effect for JSON output formats.
 
 Only has an effect for JSON output formats.
 

+

 ### Output details
 
 ### Output details
 

-* `addressdetails=[0|1]`
+| Parameter | Value | Default |
+|-----------| ----- | ------- |
+| addressdetails | 0 or 1 | 0 |

 
 

-Include a breakdown of the address into elements. (Default: 0)
+When set to 1, include a breakdown of the address into elements.
+The exact content of the address breakdown depends on the output format.

 
 

+!!! tip
+    If you are interested in a stable classification of address categories
+    (suburb, city, state, etc), have a look at the `geocodejson` format.
+    All other formats return classifications according to OSM tagging.
+    There is a much larger set of categories and they are not always consistent,
+    which makes them very hard to work with.

 
 

-* `extratags=[0|1]`

 
 

-Include additional information in the result if available,
-e.g. wikipedia link, opening hours. (Default: 0)
+| Parameter | Value | Default |
+|-----------| ----- | ------- |
+| extratags | 0 or 1 | 0 |

 
 

+When set to 1, the response include any additional information in the result
+that is available in the database, e.g. wikipedia link, opening hours.

 
 

-* `namedetails=[0|1]`

 
 

-Include a list of alternative names in the results. These may include
-language variants, references, operator and brand. (Default: 0)
+| Parameter | Value | Default |
+|-----------| ----- | ------- |
+| namedetails | 0 or 1 | 0 |
+
+When set to 1, include a full list of names for the result. These may include
+language variants, older names, references and brand.

 
 
 ### Language of results
 
 
 
 ### Language of results
 

-* `accept-language=<browser language string>`
+| Parameter | Value | Default |
+|-----------| ----- | ------- |
+| accept-language | browser language string | content of "Accept-Language" HTTP header |
+
+Preferred language order for showing search results. This may either be
+a simple comma-separated list of language codes or have the same format
+as the ["Accept-Language" HTTP header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Language).
+
+!!! tip
+    First-time users of Nominatim tend to be confused that they get different
+    results when using Nominatim in the browser versus in a command-line tool
+    like wget or curl. The command-line tools
+    usually don't send any Accept-Language header, prompting Nominatim
+    to show results in the local language. Browsers on the contrary always
+    send the currently chosen browser language.

 
 

-Preferred language order for showing search results, overrides the value
-specified in the "Accept-Language" HTTP header.
-Either use a standard RFC2616 accept-language string or a simple
-comma-separated list of language codes.

 
 ### Polygon output
 
 
 ### Polygon output
 

-* `polygon_geojson=1`
-* `polygon_kml=1`
-* `polygon_svg=1`
-* `polygon_text=1`
+| Parameter | Value  | Default |
+|-----------| -----  | ------- |
+| polygon_geojson | 0 or 1 | 0 |
+| polygon_kml     | 0 or 1 | 0 |
+| polygon_svg     | 0 or 1 | 0 |
+| polygon_text    | 0 or 1 | 0 |

 
 

-Output geometry of results as a GeoJSON, KML, SVG or WKT. Only one of these
-options can be used at a time. (Default: 0)
+Add the full geometry of the place to the result output. Output formats
+in GeoJSON, KML, SVG or WKT are supported. Only one of these
+options can be used at a time.

 
 

-* `polygon_threshold=0.0`
+| Parameter | Value  | Default |
+|-----------| -----  | ------- |
+| polygon_threshold | floating-point number | 0.0 |

 
 

-Return a simplified version of the output geometry. The parameter is the
+When one of the polygon_* outputs is chosen, return a simplified version
+of the output geometry. The parameter describes the

 tolerance in degrees with which the geometry may differ from the original
 tolerance in degrees with which the geometry may differ from the original

-geometry. Topology is preserved in the result. (Default: 0.0)
+geometry. Topology is preserved in the geometry.
+

 
 ### Other
 
 
 ### Other
 

-* `email=<valid email address>`
+| Parameter | Value  | Default |
+|-----------| -----  | ------- |
+| email     | valid email address | _unset_ |

 
 If you are making large numbers of request please include an appropriate email
 
 If you are making large numbers of request please include an appropriate email

-address to identify your requests. See Nominatim's [Usage Policy](https://operations.osmfoundation.org/policies/nominatim/) for more details.
+address to identify your requests. See Nominatim's
+[Usage Policy](https://operations.osmfoundation.org/policies/nominatim/) for more details.

 
 

-* `debug=[0|1]`
+
+| Parameter | Value  | Default |
+|-----------| -----  | ------- |
+| debug     | 0 or 1 | 0       |

 
 Output assorted developer debug information. Data on internals of Nominatim's
 
 Output assorted developer debug information. Data on internals of Nominatim's

-"Search Loop" logic, and SQL queries. The output is (rough) HTML format.
-This overrides the specified machine readable format. (Default: 0)
+"search loop" logic, and SQL queries. The output is HTML format.
+This overrides the specified machine readable format.

 
 
 ## Examples
 
 ##### XML
 
 
 
 ## Examples
 
 ##### XML
 

-[https://nominatim.openstreetmap.org/lookup?osm_ids=R146656,W104393803,N240109189](https://nominatim.openstreetmap.org/lookup?osm_ids=R146656,W104393803,N240109189)
+[https://nominatim.openstreetmap.org/lookup?osm_ids=R146656,W104393803,N240109189](https://nominatim.openstreetmap.org/lookup?osm_ids=R146656,W50637691,N240109189)

 
 ```xml
 
 ```xml

-  <lookupresults timestamp="Mon, 29 Jun 15 18:01:33 +0000" attribution="Data © OpenStreetMap contributors, ODbL 1.0. https://www.openstreetmap.org/copyright" querystring="R146656,W104393803,N240109189" polygon="false">
-    <place place_id="127761056" osm_type="relation" osm_id="146656" place_rank="16" lat="53.4791466" lon="-2.2447445" display_name="Manchester, Greater Manchester, North West England, England, United Kingdom" class="boundary" type="administrative" importance="0.704893333438333">
+  <lookupresults timestamp="Mon, 28 Mar 22 14:38:54 +0000" attribution="Data &#xA9; OpenStreetMap contributors, ODbL 1.0. http://www.openstreetmap.org/copyright" querystring="R146656,W50637691,N240109189" more_url="">
+    <place place_id="282236157" osm_type="relation" osm_id="146656" place_rank="16" address_rank="16" boundingbox="53.3401044,53.5445923,-2.3199185,-2.1468288" lat="53.44246175" lon="-2.2324547359718547" display_name="Manchester, Greater Manchester, North West England, England, United Kingdom" class="boundary" type="administrative" importance="0.35">

       <city>Manchester</city>
       <county>Greater Manchester</county>
       <state_district>North West England</state_district>
       <city>Manchester</city>
       <county>Greater Manchester</county>
       <state_district>North West England</state_district>


@@ -102,21 +156,20 @@ This overrides the specified machine readable format. (Default: 0)
       <country>United Kingdom</country>
       <country_code>gb</country_code>
     </place>
       <country>United Kingdom</country>
       <country_code>gb</country_code>
     </place>

-    <place place_id="77769745" osm_type="way" osm_id="104393803" place_rank="30" lat="52.5162024" lon="13.3777343363579" display_name="Brandenburg Gate, 1, Pariser Platz, Mitte, Berlin, 10117, Germany" class="tourism" type="attraction" importance="0.443472858361592">
-      <attraction>Brandenburg Gate</attraction>
-      <house_number>1</house_number>
-      <pedestrian>Pariser Platz</pedestrian>
-      <suburb>Mitte</suburb>
-      <city_district>Mitte</city_district>
-      <city>Berlin</city>
-      <state>Berlin</state>
-      <postcode>10117</postcode>
+    <place place_id="115462561" osm_type="way" osm_id="50637691" place_rank="30" address_rank="30" boundingbox="52.3994612,52.3996426,13.0479574,13.0481754" lat="52.399550700000006" lon="13.048066846939687" display_name="Brandenburger Tor, Brandenburger Stra&#xDF;e, Historische Innenstadt, Innenstadt, Potsdam, Brandenburg, 14467, Germany" class="tourism" type="attraction" importance="0.29402874005524">
+      <tourism>Brandenburger Tor</tourism>
+      <road>Brandenburger Stra&#xDF;e</road>
+      <suburb>Historische Innenstadt</suburb>
+      <city>Potsdam</city>
+      <state>Brandenburg</state>
+      <postcode>14467</postcode>

       <country>Germany</country>
       <country_code>de</country_code>
     </place>
       <country>Germany</country>
       <country_code>de</country_code>
     </place>

-    <place place_id="2570600569" osm_type="node" osm_id="240109189" place_rank="15" lat="52.5170365" lon="13.3888599" display_name="Berlin, Germany" class="place" type="city" importance="0.822149797630868">
+    <place place_id="567505" osm_type="node" osm_id="240109189" place_rank="15" address_rank="16" boundingbox="52.3586925,52.6786925,13.2396024,13.5596024" lat="52.5186925" lon="13.3996024" display_name="Berlin, 10178, Germany" class="place" type="city" importance="0.78753902824914">

       <city>Berlin</city>
       <state>Berlin</state>
       <city>Berlin</city>
       <state>Berlin</state>

+      <postcode>10178</postcode>

       <country>Germany</country>
       <country_code>de</country_code>
     </place>
       <country>Germany</country>
       <country_code>de</country_code>
     </place>


@@ -125,38 +178,50 @@ This overrides the specified machine readable format. (Default: 0)
 
 ##### JSON with extratags
 
 
 ##### JSON with extratags
 

-[https://nominatim.openstreetmap.org/lookup?osm_ids=W50637691&format=json](https://nominatim.openstreetmap.org/lookup?osm_ids=W50637691&format=json)
+[https://nominatim.openstreetmap.org/lookup?osm_ids=W50637691&format=json&extratags=1](https://nominatim.openstreetmap.org/lookup?osm_ids=W50637691&format=json&extratags=1)

 
 ```json
 [
 
 ```json
 [

-  {
-    "place_id": "84271358",
-    "licence": "Data © OpenStreetMap contributors, ODbL 1.0. https://osm.org/copyright",
-    "osm_type": "way",
-    "osm_id": "50637691",
-    "lat": "52.39955055",
-    "lon": "13.04806574678",
-    "display_name": "Brandenburger Tor, Brandenburger Straße, Nördliche Innenstadt, Innenstadt, Potsdam, Brandenburg, 14467, Germany",
-    "class": "historic",
-    "type": "city_gate",
-    "importance": "0.221233780277011",
-    "address": {
-      "address29": "Brandenburger Tor",
-      "pedestrian": "Brandenburger Straße",
-      "suburb": "Nördliche Innenstadt",
-      "city": "Potsdam",
-      "state": "Brandenburg",
-      "postcode": "14467",
-      "country": "Germany",
-      "country_code": "de"
-    },
-    "extratags": {
-      "image": "http://commons.wikimedia.org/wiki/File:Potsdam_brandenburger_tor.jpg",
-      "wikidata": "Q695045",
-      "wikipedia": "de:Brandenburger Tor (Potsdam)",
-      "wheelchair": "yes",
-      "description": "Kleines Brandenburger Tor in Potsdam"
-    }
-  }
+   {
+      "place_id": 115462561,
+      "licence": "Data © OpenStreetMap contributors, ODbL 1.0. https://osm.org/copyright",
+      "osm_type": "way",
+      "osm_id": 50637691,
+      "boundingbox": [
+        "52.3994612",
+        "52.3996426",
+        "13.0479574",
+        "13.0481754"
+      ],
+      "lat": "52.399550700000006",
+      "lon": "13.048066846939687",
+      "display_name": "Brandenburger Tor, Brandenburger Straße, Historische Innenstadt, Innenstadt, Potsdam, Brandenburg, 14467, Germany",
+      "class": "tourism",
+      "type": "attraction",
+      "importance": 0.2940287400552381,
+      "address": {
+        "tourism": "Brandenburger Tor",
+        "road": "Brandenburger Straße",
+        "suburb": "Historische Innenstadt",
+        "city": "Potsdam",
+        "state": "Brandenburg",
+        "postcode": "14467",
+        "country": "Germany",
+        "country_code": "de"
+      },
+      "extratags": {
+        "image": "http://commons.wikimedia.org/wiki/File:Potsdam_brandenburger_tor.jpg",
+        "heritage": "4",
+        "wikidata": "Q695045",
+        "architect": "Carl von Gontard;Georg Christian Unger",
+        "wikipedia": "de:Brandenburger Tor (Potsdam)",
+        "wheelchair": "yes",
+        "description": "Kleines Brandenburger Tor in Potsdam",
+        "heritage:website": "http://www.bldam-brandenburg.de/images/stories/PDF/DML%202012/04-p-internet-13.pdf",
+        "heritage:operator": "bldam",
+        "architect:wikidata": "Q68768;Q95223",
+        "year_of_construction": "1771"
+      }
+   }

 ]
 ```
 ]
 ```