<graph mode=interactive>{{#tag:syntaxhighlight|

{

 "version": 2,
 "width": 500,
 "height": 260,
 "padding": 12,
 "background": "#edf1f7",
 "data": [
   {
     "name": "countryNames",
     "url": "wikidatasparql:///?query=PREFIX%20wikibase%3A%20%3Chttp%3A%2F%2Fwikiba.se%2Fontology%23%3E%0APREFIX%20wd%3A%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fentity%2F%3E%20%0APREFIX%20wdt%3A%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fid%20%3Fvalue%20WHERE%20%7B%0A%20%20%20%7B%20SELECT%20DISTINCT%20%3Fid%20%20WHERE%20%7B%0A%20%20%20%20%20%3Fplace%20wdt%3AP17%20%3Fid%20.%0A%20%20%20%7D%20%7D%0A%20%20%20%3Fid%20wdt%3AP299%20%3Fcode%20.%0A%20%20%20SERVICE%20wikibase%3Alabel%20%7B%0A%20%20%20%20%20bd%3AserviceParam%20wikibase%3Alanguage%20%22en%2Cen%22%20.%0A%20%20%20%20%20%3Fid%20rdfs%3Alabel%20%3Fvalue%0A%20%20%20%7D%0A%7D%0A",
     "format": { "type": "json" }
   },
   {
     "name": "countryPopulation",
     "url": "wikidatasparql:///?query=PREFIX%20wikibase%3A%20%3Chttp%3A%2F%2Fwikiba.se%2Fontology%23%3E%0APREFIX%20wd%3A%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fentity%2F%3E%20%0APREFIX%20wdt%3A%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20%3Fid%20%3Fvalue%20WHERE%20%7B%0A%20%20%20%7B%20SELECT%20DISTINCT%20%3Fid%20%20WHERE%20%7B%0A%20%20%20%20%20%3Fplace%20wdt%3AP17%20%3Fid%20.%0A%20%20%20%7D%20%7D%0A%20%20%20%3Fid%20wdt%3AP299%20%3Fcode%20.%0A%20%20%20%3Fid%20wdt%3AP1082%20%3Fvalue%20.%0A%7D%0A",
     "format": { "type": "json" }
   },
   {
     "name": "museumCounts",
     "url":"wikidatasparql:///?query=PREFIX%20wikibase%3A%20%3Chttp%3A%2F%2Fwikiba.se%2Fontology%23%3E%0APREFIX%20wd%3A%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fentity%2F%3E%20%0APREFIX%20wdt%3A%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fdirect%2F%3E%0A%0ASELECT%20DISTINCT%20%3Fid%20(count(*)%20as%20%3Fvalue)%20WHERE%20%7B%0A%20%20%20%3Fplace%20wdt%3AP31%2Fwdt%3AP279*%20wd%3AQ33506%20.%0A%20%20%20%3Fplace%20wdt%3AP17%20%3Fid%20.%0A%7D%0A%0AGROUP%20BY%20%3Fid",
     "format": { "type": "json" }
   },
   {
     "name": "map",
     "url": "wikiraw:///Extension:Graph/Demo/RawData:WorldMap-json",
     "format": {"type": "topojson","feature": "countries"},
     "transform": [
       {
         "type": "geopath",
         "value": "data",
         "scale": 80,
         "center": [-180,125],
         "translate": [0,0],
         "projection": "equirectangular"
       },
       {
         "type": "lookup",
         "keys": ["id"],
         "on": "countryNames",
         "onKey": "id",
         "as": ["name"],
         "default": {"value": {"value": "???"} }
       },
       { "type": "formula", "field": "name", "expr": "datum.name.value" },
       {
         "type": "lookup",
         "keys": ["id"],
         "on": "countryPopulation",
         "onKey": "id",
         "as": ["population"],
         "default": {"value": {"value": 0} }
       },
       { "type": "formula", "field": "population", "expr": "datum.population.value" },
       {
         "type": "lookup",
         "keys": ["id"],
         "on": "museumCounts",
         "onKey": "id",
         "as": ["museums"],
         "default": {"value": {"value": 0} }
       },
       { "type": "formula", "field": "museums", "expr": "datum.museums.value" },
       {
         "type": "formula",
         "field": "rate",
         "expr": "datum.population > 0 && datum.museums > 0 ? (datum.museums / datum.population) : 0.000000001"
       }
     ]
   }
 ],
 "signals": [
   {
     "name": "tooltipSignal",
     "init": {"expr": "{x: 0, y: 0, datum: {name:, population:, museums:} }"}, 
     "streams": [
       {  
         "type": "@map:mouseover",    
         "expr": "{x: eventX(), y: eventY(), datum: eventItem().datum}"
       },
       {  
         "type": "@map:mouseout",
         "expr": "{x: 0, y: 0, datum: {name:, population:, museums:} }"
       }
     ] 
   }
 ],
 "scales": [
   {
     "name": "color",
     "type": "log",
     "domain": {"data": "map","field": "rate"},
     "zero": false,
     "range":  ["#FFEDBC", "#f83600"]
   }
 ],
 "marks": [
   {
     "type": "text",
     "properties": {
       "enter": {
         "text": {"value": "Museums"},
         "x": {"value": 0},
         "y": {"value": 25},
         "fontSize": {"value": 32},
         "fontWeight": {"value": "bold"},
         "fill": {"value": "steelblue"}
       }
     }
   },
   {
     "name": "map",
     "type": "path",
     "from": {"data": "map"},
     "properties": {
       "enter": {"path": {"field": "layout_path"} },
       "update": {
         "fill": [
           {
             "test": "datum.rate !== null",
             "scale": "color",
             "field": "rate"
           },
           {"value": "grey"}
         ]
       },
       "hover": {"fill": {"value": "#989898"} }
     }
   },
   {
     "type": "text",
     "properties": {
       "enter": {
         "x": {"value": 500},
         "y": {"value": 10},
         "align": {"value": "right"},
         "fontSize": {"value": 17},
         "fill": {"value": "black"}
       },
       "update": {
         "text": {"template": "\u007b{tooltipSignal.datum.name}\u007d \u007b{tooltipSignal.datum.museums}\u007d"}
       }
     }
   }
 ],
 "legends": [
   {
     "fill": "color",
     "title": "Per Capita",
     "offset": -300,
      "properties": {
      "labels": {
        "text": {"value": ""}
       },
       "gradient": {
         "stroke": {"value": "transparent"}
       },
       "title": {
         "fontSize": {"value": 14}
       },
       "legend": {
         "x": {"value": 0},
         "y": {"value": 180}
       }
     }
   }
 ]

} |lang=javascript}}</graph>