Signal K plugin to provide chart support for Signal K server

Usage no npm install needed!

<script type="module">
  import signalkChartsPlugin from 'https://cdn.skypack.dev/@signalk/charts-plugin';


Signal K Node server Charts plugin

Signal K Node server plugin to provide chart metadata, such as name, description and location of the actual chart tile data.


  1. Install "Signal K Charts" plugin from Signal K Appstore

  2. Add "Chart paths" in plugin configuration. Defaults to ${signalk-configuration-path}/charts

Chart paths configuration
  1. Put charts into selected paths

  2. Add optional online chart providers

Online chart providers configuration

WMS example: image

  1. Activate plugin

  2. Use one of the client apps supporting Signal K charts, for example:

Supported chart formats

  • MBTiles file
  • Directory with cached TMS tiles and tilemapresource.xml
  • Directory with XYZ tiles and metadata.json
  • Online TMS

Publicly available MBTiles charts can be found from:


Plugin adds support for /resources/charts endpoints described in Signal K specification:

  • GET /signalk/v1/api/resources/charts/ returns metadata for all available charts
  • GET /signalk/v1/api/resources/charts/${identifier}/ returns metadata for selected chart
  • GET /signalk/v1/api/resources/charts/${identifier}/${z}/${x}/${y} returns a single tile for selected chart


Copyright 2018 Mikko Vesikkala

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.