Summary Examples of building a simple web map using OpenLayers 3 and Leaflet. OpenLayers 3 Basic map with OSM tiles OS-GB Map with Ordnance Survey tiles GeoJSON layer with markers Info for GeoJSON layer WMS layer Info for WMS layer Leaflet Basic map with OSM tiles OS-GB Map with Ordnance Survey tiles GeoJSON layer with markers Info for GeoJSON layer WMS layer Info for WMS layer