🗺️ PDOK Locatieserver TypeScript Client

A lightweight, type-safe client for the PDOK Locatieserver API.
It provides simple functions for querying PDOK’s geocoding endpoints (free, suggest, lookup, reverse) and utilities for filtering and working with structured location documents.

View PDOK Locatieserver documentation for more information.

🚀 Features

• ✅ Written in TypeScript — fully type-safe
• ✅ Supports all PDOK locatieserver API types (free, suggest, lookup, reverse)
• ✅ Includes typed response models for addresses, cities, municipalities, streets, and zipcodes
• ✅ Utility filters for quickly narrowing results
• ✅ Minimal and dependency-free

📦 Installation

npm install pdok-locatieserver
# or
yarn add pdok-locatieserver
# or
pnpm install pdok-locatieserver

🧩 Usage

Free API

The Free API offers the option of free search (classic geocoding), where the API returns results directly based on the search query without the intervention of suggestions.

import {findLocations} from 'pdok-locatieserver';
const result = await findLocations({api: 'free', q: 'Zwolle'});

Suggest API

The Suggest API offers the possibility to enter a search query (or part of one), after which suggestions are returned.

import {findLocations} from 'pdok-locatieserver';
const result = await findLocations({api: 'suggest', q: 'Zwolle'});

Lookup API

Once a choice has been made based on suggestions from the Suggest API, the Lookup API is called, which returns, among other things, a (simplified) geometry of the search query.

import {findLocations} from 'pdok-locatieserver';
const result = await findLocations({api: 'lookup', id: 'gem-effca2786db69e038aca18fc3b0f4b21'});

Reverse API

The Reverse API offers the possibility to specify a location (point geometry) and then receive various data in a range around this location.

import {findLocations} from 'pdok-locatieserver';
const result = await findLocations({api: 'reverse', q: 'Zwolle'});

🛠️ Utilities

Each PDOK response can contain a mix of document types. Use these utility to filter only the documents you need:

const {doc} = await findLocations({api: 'free', q: 'Zwolle'});
filterDocumentsByAddress(docs);      // → Array<AddressDocument>
filterDocumentsByCity(docs);         // → Array<CityDocument>
filterDocumentsByMunicipality(docs); // → Array<MunicipalityDocument>
filterDocumentsByStreet(docs);       // → Array<StreetDocument>
filterDocumentsByZipcode(docs);      // → Array<ZipcodeDocument>

Or use the generic version:

import { filterDocumentsBy } from 'pdok-locatieserver';
filterDocumentsBy('weg', docs);      // Array<StreetDocument>

🧱 Type System

The library includes detailed TypeScript interfaces for all PDOK locatieserver document types:

type DocumentType = 'adres' | 'gemeente' | 'woonplaats' | 'weg' | 'postcode'

interface Document {
  type: DocumentType
  // ...
}

Each subtype (AddressDocument, CityDocument, etc.) contains strongly typed fields such as straatnaam, woonplaatsnaam, postcode, and more.

🧾 License

MIT — Created with ❤️ for developers who need simple and typed access to the PDOK Locatieserver API.