[
    {
        "category": "Worldwide",
        "isOverlay": false,
        "title": "Esri Imagery",
        "url": "https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}",
        "minZoom": 1,
        "maxZoom": 19,
        "attributions": "<a href='https://www.arcgis.com/home/item.html?id=10df2279f9684e4a9f6a7f08febac2a9' target='_blank'>&copy;Esri</a><br>"
    },
    {
     "category": "Esri",
     "isOverlay": false,
     "title": "Esri Topo",
     "url": "http://services.arcgisonline.com/arcgis/rest/services/World_Topo_Map/MapServer/tile/{z}/{y}/{x}",
     "minZoom": 3,
     "maxZoom": 19,
     "attributions": "<a href='https://www.arcgis.com' target='_blank'>&copy;Esri</a><br>"
    },
    {
     "category": "Railways",
     "isOverlay": true,
     "title": "Railway map",
     "url": "http://tiles.openrailwaymap.org/standard/{z}/{x}/{y}.png",
     "minZoom": 3,
     "maxZoom": 19,
     "attributions": "<a href='http://www.openrailwaymap.org/' target='_blank'>Openrailwaymap</a> &copy;OSM contributors<br>"
    },
    {
     "isOverlay": true,
     "title": "Railway map speeds",
     "url": "http://tiles.openrailwaymap.org/maxspeed/{z}/{x}/{y}.png"
    }  
]