Extension:Graph/Demo/Airports

From http://vega.github.io/vega-editor/?spec=airports { "version":2, "width": 620, "height": 430, "padding": {"top": 25, "left": 0, "right": 0, "bottom": 0},

"data": [ {     "name": "states", "url": "wikiraw:///Extension:Graph/data/us-10m-json", "format": {"type": "topojson", "feature": "states"}, "transform": [ {         "type": "geopath", "projection": "albersUsa", "scale": 800, "translate": [300, 200] }     ]    },    {      "name": "traffic", "url": "wikiraw:///Extension:Graph/data/flights-airport-csv", "format": {"type": "csv", "parse": "auto"}, "transform": [ {         "type": "aggregate", "groupby": ["origin"], "summarize": [{"field": "count", "ops": ["sum"], "as": ["flights"]}] }     ]    },    {      "name": "airports", "url": "wikiraw:///Extension:Graph/data/airports-csv", "format": {"type": "csv", "parse": "auto"}, "transform": [ {         "type": "lookup", "on": "traffic", "onKey": "origin", "keys": ["iata"], "as": ["traffic"] },       {          "type": "filter", "test": "datum.traffic != null" },       {          "type": "geo", "projection": "albersUsa", "scale": 800, "translate": [300, 200], "lon": "longitude", "lat": "latitude" },       {          "type": "filter", "test": "datum.layout_x != null && datum.layout_y != null" },       { "type": "sort", "by": "-traffic.flights" }, { "type": "voronoi", "x": "layout_x", "y": "layout_y" } ]   },    {      "name": "routes", "url": "wikiraw:///Extension:Graph/data/flights-airport-csv", "format": {"type": "csv", "parse": "auto"}, "transform": [ { "type": "filter", "test": "hover && hover.iata == datum.origin" }, {         "type": "lookup", "on": "airports", "onKey": "iata", "keys": ["origin", "destination"], "as": ["_source", "_target"] },       { "type": "filter", "test": "datum._source && datum._target" }, { "type": "linkpath" } ]   }  ],

"scales": [ {     "name": "size", "type": "linear", "domain": {"data": "traffic", "field": "flights"}, "range": [16, 1000] } ],

"signals": [ {     "name": "hover", "init": null, "streams": [ {"type": "@cell:mouseover", "expr": "datum"}, {"type": "@cell:mouseout", "expr": "null"} ]   },    {      "name": "title", "init": "U.S. Airports, 2008", "streams": [{ "type": "hover", "expr": "hover ? hover.name + ' (' + hover.iata + ')' : 'U.S. Airports, 2008'" }]   },    {      "name": "cell_stroke", "init": null, "streams": [{"type": "dblclick", "expr": "cell_stroke ? null : 'brown'"}] } ],

"marks": [ {     "type": "path", "from": {"data": "states"}, "properties": { "enter": { "fill": {"value": "#dedede"}, "stroke": {"value": "white"} },       "update": { "path": {"field": "layout_path"} }     }    },    {      "type": "symbol", "from": {"data": "airports"}, "properties": { "enter": { "size": {"scale": "size", "field": "traffic.flights"}, "fill": {"value": "steelblue"}, "fillOpacity": {"value": 0.8}, "stroke": {"value": "white"}, "strokeWidth": {"value": 1.5} },       "update": { "x": {"field": "layout_x"}, "y": {"field": "layout_y"} }     }    },    {      "type": "path", "name": "cell", "from": {"data": "airports"}, "properties": { "enter": { "fill": {"value": "transparent"}, "strokeWidth": {"value": 0.35} },       "update": { "path": {"field": "layout_path"}, "stroke": {"signal": "cell_stroke"} }     }    },    {      "type": "path", "interactive": false, "from": {"data": "routes"}, "properties": { "enter": { "path": {"field": "layout_path"}, "stroke": {"value": "black"}, "strokeOpacity": {"value": 0.35} }     }    },    {      "type": "text", "interactive": false, "properties": { "enter": { "x": {"value": 600}, "y": {"value": 0}, "fill": {"value": "black"}, "fontSize": {"value": 20}, "align": {"value": "right"} },       "update": { "text": {"signal": "title"} }     }    }  ] }