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OpenLayers ( is an open-source implementation of a "Slippy Map" interface. It is a JavaScript library released under the BSD license. It is one of several libraries you can use to deploy your own slippy map on a website.


OpenLayers screenshot embedded in this wiki page

Most examples are also available for viewing online here.

More information

OpenLayers tools

  • Slippy Map Generator - Point and click to set up a map, then download the code needed to initialise OpenLayers.
  • FacilMap - Includeable JavaScript library to make it easy to set up OpenLayers with OSM layers, and other features such as search, and OpenStreetBugs.
  • Mapstraction - A library abstracting between different javascript map "providers" of which OpenLayers is one.
  • Slipple - A simple slippy map resembling Gmaps API, with custom markers and routes.

Base layers & overlays

See Tiles for examples of base layers and overlays available for building online maps