API Reference

Query

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Execute a PlazaQL query

FeatureCollection query().execute(QueryExecuteParamsparams, RequestOptionsrequestOptions = RequestOptions.none())

POST/api/v1/query

Execute a PlazaQL query

ParametersExpand Collapse

QueryExecuteParams params

Optional<String> format

Response format: json (default), geojson, csv, ndjson

PlazaqlQuery plazaqlQuery

PlazaQL query request. The query is executed against Plaza's OSM database and results are returned as GeoJSON.

ReturnsExpand Collapse

class FeatureCollection:

GeoJSON FeatureCollection (RFC 7946). For paginated endpoints, metadata is returned in HTTP response headers rather than the body:

Header	Description
X-Limit	Requested result limit
X-Has-More	true if more results exist
X-Next-Cursor	Opaque cursor for next page (cursor pagination)
X-Next-Offset	Numeric offset for next page (offset pagination)
Link	RFC 8288 rel="next" link to the next page

Content-Type is application/geo+json.

List<GeoJsonFeature> features

Array of GeoJSON Feature objects

GeoJsonGeometry geometry

GeoJSON Geometry object per RFC 7946. Coordinates use [longitude, latitude] order. 3D coordinates [lng, lat, elevation] are used for elevation endpoints.

Coordinates coordinates

Coordinates array. Nesting depth varies by geometry type: Point = [lng, lat], LineString = [[lng, lat], ...], Polygon = [[[lng, lat], ...], ...], etc.

One of the following:

List<double>

List<List<double>>

List<List<List<double>>>

List<List<List<List<double>>>>

Type type

Geometry type

One of the following:

POINT("Point")

LINE_STRING("LineString")

POLYGON("Polygon")

MULTI_POINT("MultiPoint")

MULTI_LINE_STRING("MultiLineString")

MULTI_POLYGON("MultiPolygon")

Properties properties

OSM tags flattened as key-value pairs, plus @type (node/way/relation) and @id (OSM ID) metadata fields. May include distance_m for proximity queries.

Type type

Always Feature

Optional<String> id

Compound identifier in type/osm_id format

Type type

Always FeatureCollection

Execute a PlazaQL query

Java

HTTP

TypeScript

Python

Java

Kotlin

Go

Ruby

CLI Tool

PHP

C#

package com.plazafyi.example;

import com.plazafyi.client.PlazaClient;
import com.plazafyi.client.okhttp.PlazaOkHttpClient;
import com.plazafyi.models.FeatureCollection;
import com.plazafyi.models.query.PlazaqlQuery;
import com.plazafyi.models.query.QueryExecuteParams;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        PlazaClient client = PlazaOkHttpClient.fromEnv();

        PlazaqlQuery params = PlazaqlQuery.builder()
            .data("$$ = search(node, amenity: \"cafe\").around(distance: 500, geometry: point(48.8566, 2.3522));")
            .build();
        FeatureCollection featureCollection = client.query().execute(params);
    }
}

200 example

{
  "features": [
    {
      "geometry": {
        "coordinates": [
          2.3522,
          48.8566
        ],
        "type": "Point"
      },
      "properties": {
        "@id": "bar",
        "@type": "bar",
        "amenity": "bar",
        "cuisine": "bar",
        "name": "bar"
      },
      "type": "Feature",
      "id": "node/21154906"
    }
  ],
  "type": "FeatureCollection"
}

Returns Examples

200 example

{
  "features": [
    {
      "geometry": {
        "coordinates": [
          2.3522,
          48.8566
        ],
        "type": "Point"
      },
      "properties": {
        "@id": "bar",
        "@type": "bar",
        "amenity": "bar",
        "cuisine": "bar",
        "name": "bar"
      },
      "type": "Feature",
      "id": "node/21154906"
    }
  ],
  "type": "FeatureCollection"
}