Developer API

The Nautical Chart API
for Your App

Add marine charts to your web or mobile app with a single style URL. Depths, navigation aids, hazards, and ports — all rendered by MapLibre.

Compatible with MapLibre GL JS, iOS, Android, and Mapbox GL JS.

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One URL. That's the whole integration.

MarineCharts serves a complete MapLibre style. Point your map at your style URL and you're done — no tile configuration, no layer setup, no style authoring.

Your style URL


        https://marinecharts.io/api/style?token=YOUR_API_TOKEN

Sign up

Create a free account and start your 14-day trial. No credit card required.

Get your API token

Your token is generated automatically when you sign up. Copy your style URL from the dashboard.

Integrate

Pass the style URL to your MapLibre map. Web, iOS, and Android all use the same URL.

Integrate in minutes

The same style URL works across every MapLibre-compatible platform.

MapLibre GL JS — Web

import maplibregl from 'maplibre-gl';
import 'maplibre-gl/dist/maplibre-gl.css';

const map = new maplibregl.Map({
  container: 'map',
  style: 'https://marinecharts.io/api/style?token=YOUR_API_TOKEN',
  center: [-122.4, 37.8],
  zoom: 12
});

MapLibre — iOS (Swift)

import MapLibre

let styleURL = URL(string: "https://marinecharts.io/api/style?token=YOUR_API_TOKEN")!

let map = MLNMapView(frame: view.bounds)
map.styleURL = styleURL
view.addSubview(map)

MapLibre — Android (Kotlin)

val mapView = MapView(context)
val styleUrl = "https://marinecharts.io/api/style?token=YOUR_API_TOKEN"

mapView.getMapAsync { map ->
    map.setStyle(Style.Builder().fromUri(styleUrl))
}

What's in the nautical chart data

Built from official NOAA ENC data, updated regularly, and optimised for vector rendering.

Depths & soundings

Accurate depth contours and point soundings across US coastal and inland waters

Navigation aids

Buoys, lights, beacons, and day marks with their characteristics

Hazards & obstructions

Rocks, wrecks, shoals, and underwater obstructions

Port & harbour data

Marinas, anchorages, dock facilities, and restricted areas

Traffic separation schemes

Shipping lanes, precautionary areas, and separation zones

Tidal & current data

Tidal flats, current stations, and water boundaries

Works with your existing stack

Any library or SDK that accepts a MapLibre style URL will work with MarineCharts.

MapLibre GL JS

MapLibre iOS

MapLibre Android

Mapbox GL JS

Compatible with MapLibre, Mapbox, OpenLayers, and Leaflet

Simple pricing

14-day free trial on every plan. No credit card required.

Starter

$49 /month

100K tile requests/month
Full nautical chart style
Email support

Start Free Trial

Professional

$149 /month

500K tile requests/month
Full nautical chart style
Custom styling support
Priority support