const otm_layers = [
{
	"id": "background",
	"type": "background",
	"paint": {"background-color": "#eeeeee"}
},
{
	"id": "color-relief",
	"type": "color-relief",
	"source": "dem",
	"minzoom": 0,
	"maxzoom": 7.99,
	"paint": {
		"color-relief-color": ["interpolate",["linear"],["elevation"],
			1,"rgb(17,120,3)",
			100,"rgb(72,162,69)",
			300,"rgb(231,218,158)",
			1500,"rgb(161,67,0)",
			3000,"rgb(130,30,30)",
			4000,"rgb(110,110,110)",
			5000,"rgb(255,255,255)",
			6000,"rgb(255,255,255)"
		]
	}
},
{
	"id": "ocean",
	"source": "opentopomap-vector",
	"source-layer": "ocean",
	"type": "fill",
	"paint": {"fill-color": "#a3dde8","fill-outline-color": "blue"}
},
{
	"id": "built-up_area",
	"source": "opentopomap-vector",
	"source-layer": "land",
	"filter": [
		"all",
		["in", "type", "residential","industrial","commercial"]
	],
	"type": "fill",
	"paint": {"fill-color": "#dadada"}
},
{
	"id": "built-up_area2",
	"source": "opentopomap-vector",
	"source-layer": "sites",
	"filter": [
		"all",
		["in", "type", "university","college","school","hospital"]
	],
	"type": "fill",
	"paint": {"fill-color": "#dadada"}
},
{
	"id": "parks",
	"source": "opentopomap-vector",
	"source-layer": "land",
	"minzoom": 12,
	"filter": [
		"all",
		["in", "type", "park", "playground", "village_green", "golf_course", "pitch"]
	],
	"type": "fill",
	"paint": {"fill-color": "#c2f3a2"}
},
{
	"id": "forests",
	"source": "opentopomap-vector",
	"source-layer": "land",
	"filter": [
		"all",
		["==", "type", "forest"]
	],
	"type": "fill",
	"paint": {"fill-color": "#cce599","fill-outline-color": "#91c067"}
},
/*{
	"id": "landuses",
	"source": "opentopomap-vector",
	"source-layer": "land",
	"type": "fill",
	"paint": {"fill-pattern": ["get","type"]}
},*/
{
	"id": "hillshade",
	"type": "hillshade",
	"source": "dem",
	"layout": { "visibility": "visible" },
	"paint": { "hillshade-shadow-color": "#2d3100", "hillshade-method": "igor"}
},
{
	"id": "contour-lines",
	"type": "line",
	"source": "contour-source",
	"source-layer": "contours",
	"paint": {
		"line-color": "rgba(196,87,0,0.7)",
		"line-width": ["match", ["get", "level"], 1, 0.6, 0.2],
	},
},
{
	"id": "contour-labels",
	"type": "symbol",
	"source": "contour-source",
	"source-layer": "contours",
	"filter": [
		"case",
		["<=", ["zoom"], 13], 
		[">", ["get", "level"], 0],
		true // "type don"t care" (return true to show all features)
	],
	"layout": {
		"symbol-placement": "line",
		"symbol-spacing": 200,
		"text-max-angle": 120,
		"text-keep-upright": false,
        "text-field": "{ele}",
        "text-size": ["step",["zoom"],8,15, ["case",[">", ["get", "level"], 0], 10, 8]],
        "text-font": ["Roboto Regular"]
	},
	"paint": {
		"text-color": "#bc7e55",
		"text-halo-color": "rgba(255, 255, 255, 0.5)",
		"text-halo-width": 1.5
	}
},
{
	"id": "water-line",
	"source": "opentopomap-vector",
	"source-layer": "water_lines",
	"type": "line",
	"paint": {
		"line-color": "blue",
		"line-width": ["interpolate",["linear"],["zoom"],
			6, ["match", ["get", "type"], "river", 0.7, "stream", 0, 0.3],
			12, ["match", ["get", "type"], "river", 2.0, "stream", 0.6, 0.5],
		],
	}	
},        
{
	"id": "water-poly",
	"source": "opentopomap-vector",
	"source-layer": "water_polygons",
	"type": "fill",
	"paint": {"fill-color": "#a3dde8","fill-outline-color": "blue"}
},
// Labels
{
	"id": "water-line-labels",
	"source": "opentopomap-vector",
	"source-layer": "water_lines_labels",
	"type": "symbol",
	"layout": {
		"symbol-placement": "line-center",
        "text-field": "{name}",
        //"text-size": ["interpolate",["linear"],["zoom"],13,10, 18,12],
        
        "text-size": [
			"interpolate", ["linear"], ["zoom"],
			13, ["match", ["get", "type"], "canal",10, "river",10, "stream",9, 9],
			18, ["match", ["get", "type"], "canal",12, "river",12, "stream",11, 11],
		],        
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-color": "blue",
		"text-halo-color": "white", //["match",["get","type"],"river","#a3dde8","white"],
		"text-halo-width": 1.0
	}
},
{
	"id": "water-polygon-labels",
	"source": "opentopomap-vector",
	"source-layer": "water_polygon_labels",
	"type": "symbol",
	"layout": {
        "text-field": "{name}",
        "text-size": ["interpolate",["linear"],["zoom"],13,10, 18,12],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-color": "blue"
	}
},
{
	"id": "boundary",
	"source": "opentopomap-vector",
	"source-layer": "boundaries",
	"type": "line",
	"paint": {
		"line-color": "rgba(206,96,239,0.8)",
		"line-width": ["interpolate",["linear"],["zoom"],
			6, ["match", ["get", "admin_level"],1,3.0, 2,2.5, 3,1.0, 4,1.0, 5,1.0, 6,1.0, 7,0.8, 8,0.5, 0.5],
			8, ["match", ["get", "admin_level"],1,6.0, 2,5.0, 3,2.5, 4,2.5,	5,2.0, 6,1.0, 7,2.0, 8,2.0, 2.0]
		]
	}	
},
{
	"id": "natural_lines",
	"source": "opentopomap-vector",
	"source-layer": "natural_lines",
	"type": "line",
	"paint": {
		"line-color": ["match", ["get", "type"],["cliff","city_wall","embankment"],"black", "pier","#777", "weir","#999", ["dam","crevasse","dyke","breakwater","groyne"],"red", "green"],
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			 10, ["match", ["get", "type"], ["cliff","city_wall","embankment"],0.5, "dam",2.0, 1.0],
			 17, ["match", ["get", "type"], ["cliff","city_wall","embankment"],0.5, "dam",3.0, 2.0]
		],
	}
},
{
	"id": "cliff-teeth",
	"source": "opentopomap-vector",
	"source-layer": "natural_lines",
	"filter": ["any",
		["==", "type", "cliff"],
		["==", "type", "city_wall"],
		["==", "type", "embankment"],
	],
	"type": "line",
	"paint": {
		"line-color": "black",
		"line-width": ["interpolate",["linear"],["zoom"],12,1, 17,3],
		"line-offset": ["interpolate",["linear"],["zoom"],12,0.5, 17,1.5],
		"line-dasharray": [1,1],
	}
},
{
	"id": "buildings",
	"source": "opentopomap-vector",
	"source-layer": "buildings",
	"type": "fill",
	"paint": {
		"fill-color": ["interpolate",["linear"],["zoom"],
			12,"gray",
			13, ["match", ["get", "type"],["roof", "carport", "garage", "garages"], "#888",	"#333"],
			16, ["match", ["get", "type"],["roof", "carport", "garage", "garages"], "#AAA",	"gray"]
		],
		"fill-outline-color": ["interpolate",["exponential",0.5],["zoom"],12,"gray",13,"#333",14,"black"],
	}
},

// Rails
{
	"id": "railway",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",["==", "type", "rail"]
	],
	"type": "line",
	"paint": {
		"line-color": "black",
		"line-width": ["interpolate",["linear"],["zoom"],8,1, 11,1.3, 13,1.6, 17,5],
		"line-opacity": ["case", ["to-boolean", ["get","tunnel"]], 0.5, 1],
	}
},
// Roads
//################
// embankment
{
	"id": "embankment",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",
		["==", "embankment", true]
	],
	"type": "line",
	"paint": {
		"line-color": "black",		
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			10, ["+",2,["match", ["get", "type"], "motorway",5.0, "trunk",4.5, "primary",3.6, "secondary",2.4, "tertiary",2.2, "unclassified",1.3, "residential",1.3, "service",1.3, "track",1.3, "path",0.1, 0.1]],
			12, ["+",2,["match", ["get", "type"], "motorway",6.6, "trunk",6.3, "primary",4.9, "secondary",4.5, "tertiary",3.5, "unclassified",3.5, "residential",3.2, "service",2.5, "track",1.5, "path",0.1, 0.1]],
			14, ["+",2,["match", ["get", "type"], "motorway",7.0, "trunk",7, "primary",7, "secondary",6, "tertiary",6.0, "unclassified",6, "residential",5, "service",5, "track",1.5, "path",0.1, 0.1]],
			15, ["+",2,["match", ["get", "type"], "motorway",8.0, "trunk",7.5, "primary",7.5, "secondary",7.5, "tertiary",6.5, "unclassified",6.5, "residential",6, "service",6, "track",2, "path",2, 0.1]],
			19, ["+",2,["match", ["get", "type"], "motorway",20, "trunk",21, "primary",21, "secondary",21, "tertiary",21, "unclassified",21, "residential",14, "service",14, "track",2, "path",2, 0.1]],
		],
		"line-dasharray": [0.2,0.25],
	}
},

// Road casing
{
	"id": "roads-casing",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",
		["!=", "bridge", true],
		["!=", "type", "path"]
	],
	"type": "line",
	"paint": {
		//"line-color": "black",
		"line-color": ["match", ["get", "type"], "track","black", "path","black", "black"],
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			 5, ["match", ["get", "type"], "motorway",1.4, 1.4],
			 6, ["match", ["get", "type"], "motorway",2.3, "trunk",2.3, "primary",1.7, 1.6],
			 7, ["match", ["get", "type"], "motorway",3.1, "trunk",2.9, "primary",2.3, 2.0],
			 8, ["match", ["get", "type"], "motorway",3.8, "trunk",3.8, "primary",3.0, "secondary",1.9, 1.5],
			 9, ["match", ["get", "type"], "motorway",4.7, "motorway_link",3.5, "trunk",4.4, "trunk_link",3.5, "primary",3.5, "primary_link",3.5, ["secondary","secondary_link"],1.9, ["tertiary","tertiary_link"],1.9, 1.5],
			10, ["match", ["get", "type"], "motorway",5.0, "motorway_link",3.5, "trunk",4.5, "trunk_link",3.5, "primary",3.6, "primary_link",3.5, ["secondary","secondary_link"],2.6, ["tertiary","tertiary_link"],2.4, 1.5],
			11, ["match", ["get", "type"], "motorway",5.3, "motorway_link",3.5, "trunk",4.7, "trunk_link",3.5, "primary",3.5, "primary_link",3.5, ["secondary","secondary_link"],3.0, ["tertiary","tertiary_link"],2.5, "unclassified",0.5, ["residential","living_street","pedestrian"],0.5, 0.5],
			12, ["match", ["get", "type"], "motorway",6.6, "motorway_link",4.0, "trunk",6.3, "trunk_link",4.0, "primary",4.4, "primary_link",3.9, ["secondary","secondary_link"],3.5, ["tertiary","tertiary_link"],3.5, "unclassified",3.0, ["residential","living_street","pedestrian"],2.5, "service",2.0, 0.5],
			13, ["match", ["get", "type"], "motorway",6.6, "motorway_link",4.3, "trunk",6.3, "trunk_link",4.3, "primary",4.9, "primary_link",4.2, ["secondary","secondary_link"],4.5, ["tertiary","tertiary_link"],3.5, "unclassified",3.5, ["residential","living_street","pedestrian"],3.2, "service",2.5, 0.5],
			14, ["match", ["get", "type"], "motorway",7.0, "motorway_link",5.0, "trunk",7.0, "trunk_link",5.0, "primary",6.0, "primary_link",4.5, ["secondary","secondary_link"],5.5, ["tertiary","tertiary_link"],4.5, "unclassified",4.9, ["residential","living_street","pedestrian"],4.1, "service",3.0, 0.5],
			15, ["match", ["get", "type"], "motorway",8.0, "motorway_link",8.0, "trunk",7.5, "trunk_link",8.0, "primary",7.5, "primary_link",7.0, ["secondary","secondary_link"],7.5, ["tertiary","tertiary_link"],6.5, "unclassified",6.5,  ["residential","living_street","pedestrian"],6, "service",3.5, 0.5],
			19, ["match", ["get", "type"], "motorway",20, "motorway_link",20, "trunk",21, "trunk_link",21, "primary",21, "primary_link",21, ["secondary","secondary_link"],21, ["tertiary","tertiary_link"],20, "unclassified",21, ["residential","living_street","pedestrian"],20, "service",11, 0.5],
		],
		"line-opacity": ["case", ["to-boolean", ["get","tunnel"]], 0.5, 1],
		//"line-dasharray": [1,1],
	}
},
{
	"id": "roads-lowgrade-casing",	// merge with roads-casing once line-dasharray supports data-driven styling.
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",
		["!=", "bridge", true],
		["==", "type", "path"],
	],
	"type": "line",
	"paint": {
		"line-color": "black",
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			12, ["match", ["get", "tracktype"], "grade2",0.4, 0.2],
			14, ["match", ["get", "tracktype"], "grade2",0.7, "grade3",0.6, "grade4",0.5, "grade5",0.3, 0.5],
		],
		"line-opacity": ["case", ["to-boolean", ["get","tunnel"]], 0.5, 1],
		"line-dasharray": [6,6],
	}
},
// Road fill
//###########
{
	"id": "street-polygons",
	"source": "opentopomap-vector",
	"source-layer": "street_polygons",
	"type": "fill",
	"paint": {
		"fill-color": ["match",["get","type"],"pedestrian","#BBC", "#EEEEEE"],
		"fill-outline-color": "black"
	}
},
{
	"id": "roads-fill",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": ["all",
		["!=", "bridge", true]
	],
	"type": "line",
	"layout": {"line-cap": "round"},
	"paint": {
		"line-color": [
			"step",["zoom"],"white",
			 6, ["match", ["get", "type"], ["motorway","motorway_link"],"#fdb548", ["trunk","trunk_link"],"#fdfd4f", "primary","white", "primary_link","white", "secondary","white", "tertiary","white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			10, ["match", ["get", "type"], ["motorway","motorway_link"],"#fb9e2a", ["trunk","trunk_link","primary","primary_link","secondary","secondary_link"],"#fdfd4f", ["tertiary","tertiary_link"],"white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			11, ["match", ["get", "type"], ["motorway","motorway_link","trunk","trunk_link","primary","primary_link"],"#fb9e2a", ["secondary","secondary_link"],"#fdfd4f", ["tertiary","tertiary_link"],"white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			13, ["match", ["get", "type"], ["motorway","motorway_link","trunk","trunk_link","primary","primary_link"],"#fb9e2a", ["secondary","secondary_link","tertiary","tertiary_link"],"#fdfd4f", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
		],
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			 6, ["match", ["get", "type"], "motorway",1.4, "motorway_link",1.4, "trunk",1.1, "trunk_link",1.1, "primary",1.2, "primary_link",1.2, ["secondary","secondary_link"],1.5, ["tertiary","tertiary_link"],1.5, "unclassified",0, ["residential","living_street"],0, "service",1.0, 0],
			 9, ["match", ["get", "type"], "motorway",2.9, "motorway_link",2.0, "trunk",2.5, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.5, ["tertiary","tertiary_link"],1.5, "unclassified",0, ["residential","living_street"],0, "service",1.0, 0],
			11, ["match", ["get", "type"], "motorway",3.5, "motorway_link",2.0, "trunk",3.2, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.6, ["tertiary","tertiary_link"],1.6, "unclassified",0, ["residential","living_street"],0, "service",1.0, 0],
			11.05, ["match", ["get", "type"], "motorway",3.5, "motorway_link",2.0, "trunk",3.2, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.6, ["tertiary","tertiary_link"],1.6, "unclassified",1.5, ["residential","living_street","pedestrian"],1.1, "service",1.0, 0],
			12, ["match", ["get", "type"], "motorway",3.8, "motorway_link",2.2, "trunk",3.6, "trunk_link",2.5, "primary",2.3, "primary_link",2.1, ["secondary","secondary_link"],1.7, ["tertiary","tertiary_link"],1.7, "unclassified",1.5, ["residential","living_street","pedestrian"],1.1, "service",1.0, 0],
			13, ["match", ["get", "type"], "motorway",4.2, "motorway_link",2.5, "trunk",4.0, "trunk_link",2.5, "primary",3.0, "primary_link",2.5, ["secondary","secondary_link"],2.9, ["tertiary","tertiary_link"],1.8, "unclassified",2.0, ["residential","living_street","pedestrian"],1.5, "service",1.2, 0],
			14, ["match", ["get", "type"], "motorway",4.6, "motorway_link",3.5, "trunk",4.5, "trunk_link",3.5, "primary",4.0, "primary_link",3.0, ["secondary","secondary_link"],3.7, ["tertiary","tertiary_link"],3.0, "unclassified",2.8, ["residential","living_street","pedestrian"],2.7, "service",1.5, 0],
			15, ["match", ["get", "type"], "motorway",5.0, "motorway_link",5.0, "trunk",5.0, "trunk_link",5.0, "primary",5.0, "primary_link",5.0, ["secondary","secondary_link"],4.5, ["tertiary","tertiary_link"],4.2, "unclassified",4.5, ["residential","living_street","pedestrian"],4.0, "service",2.0, 0],
			19, ["match", ["get", "type"], "motorway",17,  "motorway_link",17,  "trunk",17,  "trunk_link",17,  "primary",17,  "primary_link",17,  ["secondary","secondary_link"],17,  ["tertiary","tertiary_link"],17,  "unclassified",17,  ["residential","living_street","pedestrian"],17,  "service",9.5 , 0],
		],
		"line-opacity": ["case", ["to-boolean", ["get","tunnel"]], 0.5, 1],
	}
},
// Bridges
//########
{
	"id": "bridge-layer1-casing",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",
		["==", "bridge", true],
		["==", "layer", 1]
	],
	"type": "line",
	"paint": {
		"line-color": "black",
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			 5, ["+",1,["match", ["get", "type"], "motorway",1.4, 1.4]],
			 6, ["+",1,["match", ["get", "type"], "motorway",2.3, "trunk",2.3, "primary",1.7, 1.6]],
			 7, ["+",1,["match", ["get", "type"], "motorway",3.1, "trunk",2.9, "primary",2.3, 2.0]],
			 8, ["+",1,["match", ["get", "type"], "motorway",3.8, "trunk",3.8, "primary",3.0, "secondary",1.9, 1.5]],
			 9, ["+",1,["match", ["get", "type"], "motorway",4.7, "motorway_link",3.5, "trunk",4.4, "trunk_link",3.5, "primary",3.5, "primary_link",3.5, "secondary",1.9, "tertiary",1.9, 1.5]],
			10, ["+",1,["match", ["get", "type"], "motorway",5.0, "motorway_link",3.5, "trunk",4.5, "trunk_link",3.5, "primary",3.6, "primary_link",3.5, "secondary",2.6, "tertiary",2.4, 1.5]],
			11, ["+",1,["match", ["get", "type"], "motorway",5.3, "motorway_link",3.5, "trunk",4.7, "trunk_link",3.5, "primary",3.5, "primary_link",3.5, "secondary",3.0, "tertiary",2.5, "unclassified",0.5, ["residential","living_street","pedestrian"],0.5, 0.5]],
			12, ["+",1,["match", ["get", "type"], "motorway",6.6, "motorway_link",4.0, "trunk",6.3, "trunk_link",4.0, "primary",4.4, "primary_link",3.9, ["secondary","secondary_link"],3.5, ["tertiary","tertiary_link"],3.5, "unclassified",3.0, ["residential","living_street","pedestrian"],2.5, "service",2.0, 0.5]],
			13, ["+",1,["match", ["get", "type"], "motorway",6.6, "motorway_link",4.3, "trunk",6.3, "trunk_link",4.3, "primary",4.9, "primary_link",4.2, "secondary",4.5, "tertiary",3.5, "unclassified",3.5, ["residential","living_street","pedestrian"],3.2, "service",2.5, 0.5]],
			14, ["+",1,["match", ["get", "type"], "motorway",7.0, "motorway_link",5.0, "trunk",7.0, "trunk_link",5.0, "primary",6.0, "primary_link",4.5, "secondary",5.5, "tertiary",4.5, "unclassified",4.9, ["residential","living_street","pedestrian"],4.1, "service",3.5, 0.5]],
			15, ["+",1.5,["match", ["get", "type"], "motorway",8.0, "motorway_link",8.0, "trunk",7.5, "trunk_link",8.0, "primary",7.5, "primary_link",7.0, "secondary",7.5, "tertiary",6.5, "unclassified",6.5, ["residential","living_street","pedestrian"],6, "service",4.5, 0.5]],
			19, ["+",2,["match", ["get", "type"], "motorway",20, "motorway_link",20, "trunk",21, "trunk_link",21, "primary",21, "primary_link",21, "secondary",21, "tertiary",21, "unclassified",21, ["residential","living_street","pedestrian"],21, "service",14, 0.5]],
		],
	}
},
{
	"id": "bridge-layer1-fill",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",
		["==", "bridge", true],
		["==", "layer", 1]
	],
	"type": "line",
	"layout": {"line-cap": "round"},
	"paint": {
		"line-color": [
			"step",["zoom"],"white",
			 6, ["match", ["get", "type"], ["motorway","motorway_link"],"#fdb548", ["trunk","trunk_link"],"#fdfd4f", "primary","white", "primary_link","white", "secondary","white", "tertiary","white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			10, ["match", ["get", "type"], ["motorway","motorway_link"],"#fb9e2a", ["trunk","trunk_link","primary","primary_link","secondary","secondary_link"],"#fdfd4f", ["tertiary","tertiary_link"],"white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			11, ["match", ["get", "type"], ["motorway","motorway_link","trunk","trunk_link","primary","primary_link"],"#fb9e2a", ["secondary","secondary_link"],"#fdfd4f", ["tertiary","tertiary_link"],"white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			13, ["match", ["get", "type"], ["motorway","motorway_link","trunk","trunk_link","primary","primary_link"],"#fb9e2a", ["secondary","secondary_link","tertiary","tertiary_link"],"#fdfd4f", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
		],
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			 6, ["match", ["get", "type"], "motorway",1.4, "motorway_link",1.4, "trunk",1.1, "trunk_link",1.1, "primary",1.2, "primary_link",1.2, ["secondary","secondary_link"],1.5, ["tertiary","tertiary_link"],1.5, "unclassified",0, "residential",0, "service",1.0, 0],
			 9, ["match", ["get", "type"], "motorway",2.9, "motorway_link",2.0, "trunk",2.5, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.5, ["tertiary","tertiary_link"],1.5, "unclassified",0, "residential",0, "service",1.0, 0],
			11, ["match", ["get", "type"], "motorway",3.5, "motorway_link",2.0, "trunk",3.2, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.6, ["tertiary","tertiary_link"],1.6, "unclassified",0, "residential",0, "service",1.0, 0],
			11.05, ["match", ["get", "type"], "motorway",3.5, "motorway_link",2.0, "trunk",3.2, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.6, ["tertiary","tertiary_link"],1.6, "unclassified",1.5, "residential",1.1, "service",1.0, 0],
			12, ["match", ["get", "type"], "motorway",3.8, "motorway_link",2.2, "trunk",3.6, "trunk_link",2.5, "primary",2.3, "primary_link",2.1, ["secondary","secondary_link"],1.7, ["tertiary","tertiary_link"],1.7, "unclassified",1.5, "residential",1.1, "service",1.0, 0],
			13, ["match", ["get", "type"], "motorway",4.2, "motorway_link",2.5, "trunk",4.0, "trunk_link",2.5, "primary",3.0, "primary_link",2.5, ["secondary","secondary_link"],2.9, ["tertiary","tertiary_link"],1.8, "unclassified",2.0, "residential",1.5, "service",1.2, 0],
			14, ["match", ["get", "type"], "motorway",4.6, "motorway_link",3.5, "trunk",4.5, "trunk_link",3.5, "primary",4.0, "primary_link",3.0, ["secondary","secondary_link"],3.7, ["tertiary","tertiary_link"],3.0, "unclassified",2.8, "residential",2.7, "service",1.5, 0],
			15, ["match", ["get", "type"], "motorway",5.0, "motorway_link",5.0, "trunk",5.0, "trunk_link",5.0, "primary",5.0, "primary_link",5.0, ["secondary","secondary_link"],4.5, ["tertiary","tertiary_link"],4.2, "unclassified",4.5, "residential",4.0, "service",2.0, 0],
			19, ["match", ["get", "type"], "motorway",17,  "motorway_link",17,  "trunk",17,  "trunk_link",17,  "primary",17,  "primary_link",17,  ["secondary","secondary_link"],17,  ["tertiary","tertiary_link"],17,  "unclassified",17,  "residential",17,  "service",9.5 , 0],
		],
	}
},
{
	"id": "bridge-layer2-casing",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",
		["==", "bridge", true],
		["!=", "layer", 1]
	],
	"type": "line",
	"paint": {
		"line-color": "black",
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			 5, ["+",1,["match", ["get", "type"], "motorway",1.4, 1.4]],
			 6, ["+",1,["match", ["get", "type"], "motorway",2.3, "trunk",2.3, "primary",1.7, 1.6]],
			 7, ["+",1,["match", ["get", "type"], "motorway",3.1, "trunk",2.9, "primary",2.3, 2.0]],
			 8, ["+",1,["match", ["get", "type"], "motorway",3.8, "trunk",3.8, "primary",3.0, "secondary",1.9, 1.5]],
			 9, ["+",1,["match", ["get", "type"], "motorway",4.7, "motorway_link",3.5, "trunk",4.4, "trunk_link",3.5, "primary",3.5, "primary_link",3.5, "secondary",1.9, "tertiary",1.9, 1.5]],
			10, ["+",1,["match", ["get", "type"], "motorway",5.0, "motorway_link",3.5, "trunk",4.5, "trunk_link",3.5, "primary",3.6, "primary_link",3.5, "secondary",2.6, "tertiary",2.4, 1.5]],
			11, ["+",1,["match", ["get", "type"], "motorway",5.3, "motorway_link",3.5, "trunk",4.7, "trunk_link",3.5, "primary",3.5, "primary_link",3.5, "secondary",3.0, "tertiary",2.5, "unclassified",0.5, ["residential","living_street","pedestrian"],0.5, 0.5]],
			12, ["+",1,["match", ["get", "type"], "motorway",6.6, "motorway_link",4.0, "trunk",6.3, "trunk_link",4.0, "primary",4.4, "primary_link",3.9, ["secondary","secondary_link"],3.5, ["tertiary","tertiary_link"],3.5, "unclassified",3.0, ["residential","living_street","pedestrian"],2.5, "service",2.0, 0.5]],
			13, ["+",1,["match", ["get", "type"], "motorway",6.6, "motorway_link",4.3, "trunk",6.3, "trunk_link",4.3, "primary",4.9, "primary_link",4.2, "secondary",4.5, "tertiary",3.5, "unclassified",3.5, ["residential","living_street","pedestrian"],3.2, "service",2.5, 0.5]],
			14, ["+",1,["match", ["get", "type"], "motorway",7.0, "motorway_link",5.0, "trunk",7.0, "trunk_link",5.0, "primary",6.0, "primary_link",4.5, "secondary",5.5, "tertiary",4.5, "unclassified",4.9, ["residential","living_street","pedestrian"],4.1, "service",3.5, 0.5]],
			15, ["+",1.5,["match", ["get", "type"], "motorway",8.0, "motorway_link",8.0, "trunk",7.5, "trunk_link",8.0, "primary",7.5, "primary_link",7.0, "secondary",7.5, "tertiary",6.5, "unclassified",6.5, ["residential","living_street","pedestrian"],6, "service",4.5, 0.5]],
			19, ["+",2,["match", ["get", "type"], "motorway",20, "motorway_link",20, "trunk",21, "trunk_link",21, "primary",21, "primary_link",21, "secondary",21, "tertiary",21, "unclassified",21, ["residential","living_street","pedestrian"],21, "service",14, 0.5]],
		],
	}
},
{
	"id": "bridge-layer2-fill",
	"source": "opentopomap-vector",
	"source-layer": "streets",
	"filter": [
		"all",
		["==", "bridge", true],
		["!=", "layer", 1]
	],
	"type": "line",
	"layout": {"line-cap": "round"},
	"paint": {
		"line-color": [
			"step",["zoom"],"white",
			 6, ["match", ["get", "type"], ["motorway","motorway_link"],"#fdb548", ["trunk","trunk_link"],"#fdfd4f", "primary","white", "primary_link","white", "secondary","white", "tertiary","white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			10, ["match", ["get", "type"], ["motorway","motorway_link"],"#fb9e2a", ["trunk","trunk_link","primary","primary_link","secondary","secondary_link"],"#fdfd4f", ["tertiary","tertiary_link"],"white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			11, ["match", ["get", "type"], ["motorway","motorway_link","trunk","trunk_link","primary","primary_link"],"#fb9e2a", ["secondary","secondary_link"],"#fdfd4f", ["tertiary","tertiary_link"],"white", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
			13, ["match", ["get", "type"], ["motorway","motorway_link","trunk","trunk_link","primary","primary_link"],"#fb9e2a", ["secondary","secondary_link","tertiary","tertiary_link"],"#fdfd4f", "living_street","#CCC", "pedestrian","#BBC", "rail","black", "white"],
		],
		"line-width": [
			"interpolate", ["linear"], ["zoom"],
			 6, ["match", ["get", "type"], "motorway",1.4, "motorway_link",1.4, "trunk",1.1, "trunk_link",1.1, "primary",1.2, "primary_link",1.2, ["secondary","secondary_link"],1.5, ["tertiary","tertiary_link"],1.5, "unclassified",0, "residential",0, "service",1.0, 0],
			 9, ["match", ["get", "type"], "motorway",2.9, "motorway_link",2.0, "trunk",2.5, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.5, ["tertiary","tertiary_link"],1.5, "unclassified",0, "residential",0, "service",1.0, 0],
			11, ["match", ["get", "type"], "motorway",3.5, "motorway_link",2.0, "trunk",3.2, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.6, ["tertiary","tertiary_link"],1.6, "unclassified",0, "residential",0, "service",1.0, 0],
			11.05, ["match", ["get", "type"], "motorway",3.5, "motorway_link",2.0, "trunk",3.2, "trunk_link",2.5, "primary",2.1, "primary_link",2.0, ["secondary","secondary_link"],1.6, ["tertiary","tertiary_link"],1.6, "unclassified",1.5, "residential",1.1, "service",1.0, 0],
			12, ["match", ["get", "type"], "motorway",3.8, "motorway_link",2.2, "trunk",3.6, "trunk_link",2.5, "primary",2.3, "primary_link",2.1, ["secondary","secondary_link"],1.7, ["tertiary","tertiary_link"],1.7, "unclassified",1.5, "residential",1.1, "service",1.0, 0],
			13, ["match", ["get", "type"], "motorway",4.2, "motorway_link",2.5, "trunk",4.0, "trunk_link",2.5, "primary",3.0, "primary_link",2.5, ["secondary","secondary_link"],2.9, ["tertiary","tertiary_link"],1.8, "unclassified",2.0, "residential",1.5, "service",1.2, 0],
			14, ["match", ["get", "type"], "motorway",4.6, "motorway_link",3.5, "trunk",4.5, "trunk_link",3.5, "primary",4.0, "primary_link",3.0, ["secondary","secondary_link"],3.7, ["tertiary","tertiary_link"],3.0, "unclassified",2.8, "residential",2.7, "service",1.5, 0],
			15, ["match", ["get", "type"], "motorway",5.0, "motorway_link",5.0, "trunk",5.0, "trunk_link",5.0, "primary",5.0, "primary_link",5.0, ["secondary","secondary_link"],4.5, ["tertiary","tertiary_link"],4.2, "unclassified",4.5, "residential",4.0, "service",2.0, 0],
			19, ["match", ["get", "type"], "motorway",17,  "motorway_link",17,  "trunk",17,  "trunk_link",17,  "primary",17,  "primary_link",17,  ["secondary","secondary_link"],17,  ["tertiary","tertiary_link"],17,  "unclassified",17,  "residential",17,  "service",9.5 , 0],
		],
	}
},
// All streets (for debugging)
/*{
	"id": "otherstreets",
	"source": "opentopomap-vector",
	"source-layer": "street_labels",
	//"minzoom": 15,
	"type": "line",
	"layout": {"line-cap": "round"},
	"paint": {"line-color": "red","line-width": 0.5}
},*/
{
	"id": "power-line",
	"source": "opentopomap-vector",
	"source-layer": "power_lines",
	"type": "line",
	"paint": {
		"line-color": "black",
		"line-width": 0.5,
	}
},
{
	"id": "power-line2",
	"source": "opentopomap-vector",
	"source-layer": "power_lines",
	"type": "symbol",
	"layout": {
		"symbol-placement": "line",
		"symbol-spacing": 30,
		"icon-image": "powerline",
		//"icon-rotate": 90,
		"icon-allow-overlap": true,
		"icon-ignore-placement": true,
	}
},
{
	"id": "power-tower",
	"source": "opentopomap-vector",
	"source-layer": "power_points",
	"type": "symbol",
	"layout": {
		"symbol-placement": "point",
        "icon-image": "powertower",
        "icon-allow-overlap": true
	}
},

// Symbols & labels
// ============

{
	"id": "poi-symbols",
	"source": "opentopomap-vector",
	"source-layer": "pois",
	"type": "symbol",
	"layout": {
        "icon-image": ["coalesce", ["get", "type"], "wayside_cross"],
        "icon-offset": ["match", ["get", "type"],
			"wind_turbine",["literal",[3,-10]],
			"communications_tower",["literal",[0,-5]],
			"observation_tower",["literal",[0,-5]],
			"communications_mast",["literal",[0,-5]],
			"church",["literal",[0,-3]],
			"castle",["literal",[0,-3]],
			"castle_ruins",["literal",[0,-3]],
			["literal",[0,0]]
		],
        "icon-keep-upright": true,
        "icon-allow-overlap": true,
        "symbol-placement": "point"
	}
},
{
	"id": "housenumbers",
	"source": "opentopomap-vector",
	"source-layer": "addresses",
	"minzoom": 16,
	"type": "symbol",
	"layout": {
        "text-field": "{housenumber}\n{name}",
        "text-size": ["interpolate",["linear"],["zoom"],16,9, 18,12],
        "text-font": [
          "Roboto Regular"
        ],
	},
	"paint": {
		"text-halo-color": "gray",
		"text-halo-width": 1.5
	}
},
{
	"id": "street-refs",
	"source": "opentopomap-vector",
	"source-layer": "street_labels",
	"type": "symbol",
	"layout": {
		"symbol-placement": "line",
        "text-field": "{ref}",
        "text-offset": ['step',['zoom'],['literal',[0,0]], 14,['literal',[0,0.9]]],
        "text-size": ["interpolate",["linear"],["zoom"],14,9, 18,12],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-width": 1.5,
		"text-halo-color": [
			"step",["zoom"],"white",
			10, ["match", ["get", "type"], "motorway","#fb9e2a", "trunk","#fdfd4f", "primary","#fdfd4f", "secondary","#fdfd4f", "tertiary","white", "rail","black", "white"],
			11, ["match", ["get", "type"], "motorway","#fb9e2a", "trunk","#fb9e2a", "primary","#fb9e2a", "secondary","#fdfd4f", "tertiary","white", "rail","black", "white"],
			13, ["match", ["get", "type"], "motorway","#fb9e2a", "trunk","#fb9e2a", "primary","#fb9e2a", "secondary","#fdfd4f", "tertiary","#fdfd4f", "rail","black", "white"],
			14, "white",
		],
	}
},
{
	"id": "street-names",
	"source": "opentopomap-vector",
	"source-layer": "street_labels",
	"minzoom": 14,
	"metadata": {"translate": true},
	"type": "symbol",
	"layout": {
		"symbol-placement": "line",
        "text-field": "{name}",
        "text-size": ["interpolate",["linear"],["zoom"],14,9, 18,12],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": [
			"case",
			["in", ["get", "type"], ["literal", ["motorway", "motorway_link", "trunk", "trunk_link", "primary"]]], "#fb9e2a",
			["in", ["get", "type"], ["literal", ["secondary", "tertiary"]]], "#fdfd4f",
			//["==", ["get", "type"], "secondary"], "#fdfd4f",
			"white"
		],
		"text-halo-width": 1.5
	}
},
{
	"id": "poi-texts",
	"source": "opentopomap-vector",
	"source-layer": "pois",
	"type": "symbol",
	"layout": {
        "symbol-placement": "point",
        "text-field": "{name}",
        "text-size": ['step',['zoom'],0,15, 9,16, 10],
        "text-anchor": "top",
        "text-offset": [0,0.5],
        "text-font": [
          "Roboto Regular"
        ],
        //"text-allow-overlap": true,
	},
	"paint": {
		"text-halo-color": "white",
		"text-halo-width": 1.5
	}
},
{
	"id": "suburb",
	"source": "opentopomap-vector",
	"source-layer": "place_labels",
	"metadata": {"translate":true},
	"filter": [
		"all",["in", "type", "suburb", "quarter", "neighbourhood", "island", "hamlet", "isolated_dwelling", "farm"]
	],
	"type": "symbol",
	"minzoom": 12,
	"layout": {
        "text-field": "{name}",
        "text-size": ["interpolate",["linear"],["zoom"],10,10, 13,11],
        "text-variable-anchor": ["bottom-left","center","right","bottom","bottom-right","top-left","top","top-right"],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": "white",
		"text-halo-width": 1.5
	}
},
{
	"id": "village",
	"source": "opentopomap-vector",
	"source-layer": "place_labels",
	"metadata": {"translate": true},
	"filter": [
			"all",
			["==", ["get","type"], "village"],
			["any",
				["all",[">=", ["zoom"], 9],[">=", ["get", "population"], 1000]],
				["all",[">=", ["zoom"], 10],[">=", ["get", "population"], 1000]],
				["all",[">=", ["zoom"], 11],[">=", ["get", "population"], 100]],
				["all",[">=", ["zoom"], 12],["any",[">=", ["get", "population"], 0],["!",["has", "population"]]]]
			]
	],
	"type": "symbol",
	"layout": {
        "text-field": "{name}",
        "text-size":["interpolate",["linear"],["zoom"],
			9,["case",[">=",["get","population"],5000],11,10],
			10,["case",[">=",["get","population"],5000],11.5,10.5],
			11,["case",[">=",["get","population"],2000],12,11],
			12,["case",[">=",["get","population"],2000],13,12],
			13,["case",[">=",["get","population"],5000],15,15]
		],
        "text-max-width": 7,
		"text-variable-anchor": ["bottom-left","center","right","bottom","bottom-right","top-left","top","top-right"],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": "rgba(255,255,255,1)",
		"text-halo-width": 1.5
	}
},
{
	"id": "town",
	"source": "opentopomap-vector",
	"source-layer": "place_labels",
	"metadata": {"translate": true},
	"filter": [
			"all",
			["==", ["get","type"], "town"],
			["any",
				["all",[">=", ["zoom"], 7],[">=", ["get", "population"], 10000]],
				["all",[">=", ["zoom"], 8],[">=", ["get", "population"], 5000]],
				["all",[">=", ["zoom"], 9],[">=", ["get", "population"], 1000]],
				["all",[">=", ["zoom"], 10],[">=", ["get", "population"], 1000]],
				["all",[">=", ["zoom"], 11],["any",[">=", ["get", "population"], 0],["!",["has", "population"]]]]
			]
	],
	"type": "symbol",
	"layout": {
        "text-field": "{name}",
        "symbol-sort-key": ["get","population"],
        "text-size":["interpolate",["linear"],["zoom"],
			7,["case",[">",["get","population"],20000],10,9],
			8,["case",[">",["get","population"],10000],11.7,9.5],
			9,["case",[">",["get","population"],20000],14,12],
			10,["case",[">",["get","population"],15000],15,12],
			11,["case",[">",["get","population"],10000],17,14],
			13,["case",[">",["get","population"],500],20,17]
		],
		"text-max-width": 7,
        "text-variable-anchor": ["bottom-left","center","right","bottom","bottom-right","top-left","top","top-right"],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": "rgba(255,255,255,1)",
		"text-halo-width": 1.5
	}
},
{
	"id": "city",
	"source": "opentopomap-vector",
	"source-layer": "place_labels",
	"metadata": {"translate": true},
	"filter": [
		"all",["in", "type", "city"]
	],
	"type": "symbol",
	"layout": {
		"text-field": "{name}",
        "symbol-sort-key": ["-", ["to-number", ["get", "population"]]],
        //"text-allow-overlap": true,
        "text-size": ["interpolate",["linear"],["zoom"],6,10, 7,12, 8,16, 10,22],
        "text-max-width": 7,
        "text-variable-anchor": ["bottom-left","center","right","bottom","bottom-right","top-left","top","top-right"],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": "rgba(255,255,255,1)",
		"text-halo-width": 2
	}
},
{
	"id": "state_capital",
	"source": "opentopomap-vector",
	"source-layer": "place_labels",
	"metadata": {"translate": true},
	"filter": [
		"all",["in", "type", "state_capital"]
	],
	"type": "symbol",
	"layout": {
		"text-field": "{name}",
        "text-size": ["interpolate",["linear"],["zoom"],6,10, 8,17, 10,22],
        "text-max-width": 7,
        "text-variable-anchor": ["bottom-left","center","right","bottom","bottom-right","top-left","top","top-right"],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": "rgba(255,255,255,1)",
		"text-halo-width": 2
	}
},
{
	"id": "capital",
	"source": "opentopomap-vector",
	"source-layer": "place_labels",
	"metadata": {"translate": true},
	"filter": [
		"all",["in", "type", "capital"]
	],
	"type": "symbol",
	"layout": {
		"text-field": "{name}",
        "text-size": ["interpolate",["linear"],["zoom"],6,12, 8,17, 10,22],
        "text-transform": "uppercase",
        "text-max-width": 7,
        "text-variable-anchor": ["bottom-left","center","right","bottom","bottom-right","top-left","top","top-right"],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": "rgba(255,255,255,1)",
		"text-halo-width": 2
	}
},
{
	"id": "boundary-labels",
	"source": "opentopomap-vector",
	"source-layer": "boundary_labels",
	"metadata": {"translate": true},
	"min_zoom": 6,
	"max_zoom": 7,
	"filter": [
		"all",["==", "admin_level", 2]
	],
	"type": "symbol",
	"layout": {
        "text-field": "{name}",
        "symbol-sort-key": ["-", ["get","way_area"]],
        "text-size": ["interpolate",["linear"],["zoom"],3,10, 5,14, 6,13, 7,15],
        "text-letter-spacing": ["interpolate",["linear"],["zoom"],3,0, 5,0.5, 6,0.5, 7,2],
        "text-font": [
          "Roboto Regular"
        ]
	},
	"paint": {
		"text-halo-color": "white",
		"text-halo-width": 1.5
	}
},
{
	"id": "opentopomap-raster",
	"type": "raster",
	"source": "opentopomap-raster",
	"layout": {
		"visibility": "none",
	},
	"paint": {
		"raster-opacity": 1
	}
}
];