{
  //
  // ATTENTION: This code is maintained at https://www.mediawiki.org/wiki/Template:Graph:Street_map_with_marks
  //            Please do not modify it anywhere else, as it may get copied and override your changes.
  //            Suggestions can be made at https://www.mediawiki.org/wiki/Template_talk:Graph:Street_map_with_marks
  //
  // Template translation is in /wiki/Data:Original/Template:Graphs.tab
  //
  "version": 2, "width":400, "height": 300, "padding": 0,
  "signals":[
    // These signals allow us to quickly move the map within the image, e.g. to leave space for the legend
{"name":"legendWidth", "init": {"expr": "0"} },
    {"name":"legendHeight", "init": {"expr": "height"} },
    {"name":"imgWidth", "init": {"expr": "width-legendWidth"} },
    {"name":"imgHeight", "init": {"expr": "height"} },
    {"name":"imgXC", "init": {"expr": "imgWidth/2"} },
    {"name":"imgYC", "init": {"expr": "imgHeight/2"} },
    {"name":"imgTileSize", "init": {"expr": "256"} },
    {"name":"imgLat", "init": {"expr": "40.347"} },
    {"name":"imgLon", "init": {"expr": "47.260"} },
    {"name":"imgZoom", "init": {"expr": "6"} },
    {"name":"picWidth", "init": {"expr": "180"} },
    {"name":"picHeight", "init": {"expr": "picWidth/2"} },
    {"name":"picXC", "init": {"expr": "imgWidth-(picWidth/2)"} },
    {"name":"picYC", "init": {"expr": "imgHeight-(picHeight/2)"} },
    {"name":"showMiniMap", "init": {"expr": "imgZoom>4 && imgWidth>200 && imgHeight>110"} },
  ],
  "data": [
    {
      "name": "data",
// Otherwise use the first unnamed argument for source values
      "values": [ 
        {"lat":65.6, "lon":-168.1, "color":"#f00", "size": 10},
        {"lat":90, "lon":-180, "shape":"cross", "color":"#f00", "size": 500},
        {"lat":-90, "lon":180, "shape":"cross", "color":"#f00", "size": 500},
        {"lat":0, "lon":-180, "shape":"cross", "color":"#f00", "size": 500},
        {"lat":0, "lon":180, "shape":"cross", "color":"#f00", "size": 500},
        {"lat":20, "lon":-120, "color":"#0f0"},
        {"lat":40, "lon":-120, "shape":"diamond", "color":"#0f0", "size": 80, "text": "Some cool text", "textColor": "#0ff", "textFontSize": 20, "textBaseline": "middle"},
        {"lat":-10, "lon":20, "img":"Volcano red 32x32.svg", "offsetY":-10},
        {"lat":0, "lon":0, "img":"Volcano red 32x32.svg", "width":25, "height": 25, "offsetY":-10, "text": "Big volcano", "textFontWeight": "bold", "textFontSize": 20, "textColor": "#fff"},
        {"lat":37.774755, "lon":-122.454688, "color":"#f00", "size": 10},
        
      ],
      "transform": [

        {
          "type": "geo",
          "projection": "mercator",
          "scale": {"expr": "imgTileSize/PI/2*pow(2,imgZoom)"},
          "translate": [{"expr": "imgXC"}, {"expr": "imgYC"}],
          "center": [{"expr": "imgLon"}, {"expr": "imgLat"}],
          "lon": "lon", "lat": "lat"
        },
        { "type": "formula", "field":"layout_x", "expr": "datum.layout_x + (datum.offsetX || 0)" },
        { "type": "formula", "field":"layout_y", "expr": "datum.layout_y + (datum.offsetY || 0)" },
        { "type": "formula", "field":"color", "expr": "datum.color || '#c33'" },
        { "type": "formula", "field":"textColor", "expr": "datum.textColor || datum.color" },
        { "type": "formula", "field":"strokeColor", "expr": "datum.strokeColor || '#ffe7e6'" }
      ]
    },
    {
      // Hack: single value data source for drawing/hiding images and other non-series elements
      "name": "dummyData",
      "values": [{}]
    }
  ],

// Legend only works if showLegend and colorScaleField are set

  "marks": [
    {
      "type": "image",
      "from": {
        "data": "dummyData",
        "transform": [
          { "type": "formula", "field":"url", "expr": "'mapsnapshot:///?width='+imgWidth+'&height='+imgHeight+'&zoom='+imgZoom+'&lat='+imgLat+'&lon='+imgLon" }
        ]
      },
      "properties": {
        "enter": {
          "url": {"field": "url"},
          "xc": {"signal": "imgXC"}, "yc": {"signal": "imgYC"},
          "width": {"signal": "imgWidth"}, "height": {"signal": "imgHeight"}
        }
      }
    },
    {
      // Places an image of a given name and size at the [lan,lon] location
      "type": "image",
      "from": {
        "data": "data",
        "transform": [
          { "type": "filter", "test": "datum.img" },
          { "type": "formula", "field":"iconWidth", "expr": "datum.width || 0" },
          { "type": "formula", "field":"iconHeight", "expr": "datum.height || 0" },
          { "type": "formula", "field":"img",
            "expr": "if(!test(/^[a-z]+:\\/\\//, datum.img), 'wikifile:///'+datum.img, datum.img)" },
          // Ensure that either width or height parameter is passed to wikifile:// request
          { "type": "formula", "field":"img",
            "expr": "if((datum.iconWidth || datum.iconHeight) && !test(/[?&](width|height)=\\d/, datum.img),if(datum.iconWidth,datum.img+'?width='+datum.iconWidth,datum.img+'?height='+datum.iconHeight), datum.img)" },
      ]},
      "properties": {
        "enter": {
          "url": {"field": "img"},
          "xc": {"field": "layout_x"}, "yc": {"field": "layout_y"},
          "width": {"field": "iconWidth"}, "height": {"field": "iconHeight"}
        }
      }
    },
    {
      // Draw marks of a given color, shape, and size at the [lan,lon] location
      "type": "symbol",
      "from": {
        "data": "data",
        "transform": [{ "type": "filter", "test": "!datum.img" }]
      },
      "properties": {
        "enter": {
          "x": {"field": "layout_x"},
          "y": {"field": "layout_y"},
          // If colorScaleField is set, use color scaling, otherwise use the preset color value
          "fill": { "field": "color" },
          "size": {"field": "size"},
          "shape": {"field": "shape"},
          "stroke": {"field": "strokeColor"}
        }
      }
    },
    {
      // Draw text with the given color and size at the [lan,lon] location
      // See https://github.com/vega/vega/wiki/Marks#text for all parameter description (prepend "text" and capitalize them)
      "type": "text",
      "from": {
        "data": "data",
        "transform": [
          { "type": "filter", "test": "datum.text" },
          // Figure out if this is an LTR or RTL page. For LTR, show label to the right of the icon, left-aligned. For RTL, reverse.
          { "type": "formula", "field":"isLTR", "expr": "'‎' == '\\u200E'" },
          // If these values are not defined ("undefined" is not allowed, so test for truthiness and not 0)
          { "type": "formula", "field":"textDx", "expr": "if(!datum.textDx && datum.textDx != 0, if(datum.isLTR,8,-8), datum.textDx)" },
          { "type": "formula", "field":"textAlign", "expr": "if(!datum.textAlign, if(datum.isLTR,'left','right'), datum.textAlign)" },
          { "type": "formula", "field":"textBaseline", "expr": "datum.textBaseline || 'middle'" }
      ]},
      "properties": {
        "enter": {
          "text": {"field": "text"},
          "x": {"field": "layout_x" },
          "y": {"field": "layout_y"},
          "dx": {"field": "textDx" },
          "dy": {"field": "textDy"},
          "fill": {"field": "textColor"},
          "align": {"field": "textAlign"},
          "baseline": {"field": "textBaseline"},
          "radius": {"field": "textRadius"},
          "theta": {"field": "textTheta"},
          "angle": {"field": "textAngle"},
          "font": {"field": "textFont"},
          "fontSize": {"field": "textFontSize"},
          "fontWeight": {"field": "textFontWeight"},
          "fontStyle": {"field": "textFontStyle"}
        }
      }
    },
    {
      // Draw a low-zoom locator map frame
      "type": "rect",
      "from": {
        "data": "dummyData",
        "transform": [
          { "type": "filter", "test": "showMiniMap" }
        ]
      },
      "properties": {
        "enter": {
          "xc": {"signal": "picXC"}, "yc": {"signal": "picYC"},
          "width": {"signal": "picWidth", "offset":2}, "height": {"signal": "picHeight"},
          "stroke": {"value":"#fff"},"strokeWidth": {"value":6},
        }
      }
    },
    {
      // Draw a low-zoom locator map by using a premade world map image
      "type": "image",
      "from": {
        "data": "dummyData",
        "transform": [
          { "type": "filter", "test": "showMiniMap" },
          { "type": "formula", "field":"url", "expr": "1" }
        ]
      },
      "properties": {
        "enter": {
          "url": {"value": "wikirawupload:"},
          "xc": {"signal": "picXC"}, "yc": {"signal": "picYC"},
          "width": {"signal": "picWidth"}, "height": {"signal": "picHeight"}
        }
      }
    },
    {
      // Draw a zoom-out mark at the [lan,lon] location
      "type": "symbol",
      "from": {
        "data": "dummyData",
        "transform": [
          { "type": "filter", "test": "showMiniMap" },
          { "type": "formula", "field":"lat", "expr": "imgLat" },
          { "type": "formula", "field":"lon", "expr": "imgLon" },
          {
            "type": "geo",
            "projection": "equirectangular",
            "scale": {"expr": "180/2/PI"},
            "translate": [{"expr": "picXC"}, {"expr": "picYC"}],
            "center": [{"expr": "0"}, {"expr": "0"}],
            "lon": "lon", "lat": "lat"
          }
        ]
      },
      "properties": {
        "enter": {
          "x": {"field": "layout_x"}, "y": {"field": "layout_y"},
          "fill": {"value": "#c33"},
          "stroke": {"value": "#ffe7e6"},
          "size": {"value": 40}
        }
      }
    }
  ]
}