{
    "carto-positron": {
        "name": "Light",
        "url": "https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png",
	    "attribution": "&copy; <a href='https://www.openstreetmap.org/copyright'>OpenStreetMap</a> contributors &copy; <a href='https://carto.com/attributions'>CARTO</a>"
    },
    "open-street-map": {
        "name": "Open street map",
        "url": "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
	    "attribution": "&copy; <a href='https://www.openstreetmap.org/copyright'>OpenStreetMap</a> contributors"
    },
    "stamen-terrain": {
        "name": "Terrain",
        "url": "https://stamen-tiles-{s}.a.ssl.fastly.net/terrain/{z}/{x}/{y}{r}.png",
        "attribution": "Map tiles by <a href='http://stamen.com'>Stamen Design</a>, <a href='http://creativecommons.org/licenses/by/3.0'>CC BY 3.0</a> &mdash; Map data &copy; <a href='https://www.openstreetmap.org/copyright'>OpenStreetMap</a> contributors"
    },
    "esri-world": {
        "name": "ESRI",
        "url": "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}",
       	"attribution": "Tiles &copy; Esri &mdash; Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, UPR-EGP, and the GIS User Community"
    }
}
