Extension:Graph/Demo/falkensee

Copied from vega demo, which was modeled on. { "version": 2, "width": 500, "height": 250, "padding": "auto", "data": [ {     "name": "table", "values": [ {"year": 1875,"population": 1309}, {"year": 1890,"population": 1558}, {"year": 1910,"population": 4512}, {"year": 1925,"population": 8180}, {"year": 1933,"population": 15915}, {"year": 1939,"population": 24824}, {"year": 1946,"population": 28275}, {"year": 1950,"population": 29189}, {"year": 1964,"population": 29881}, {"year": 1971,"population": 26007}, {"year": 1981,"population": 24029}, {"year": 1985,"population": 23340}, {"year": 1989,"population": 22307}, {"year": 1990,"population": 22087}, {"year": 1991,"population": 22139}, {"year": 1992,"population": 22105}, {"year": 1993,"population": 22242}, {"year": 1994,"population": 22801}, {"year": 1995,"population": 24273}, {"year": 1996,"population": 25640}, {"year": 1997,"population": 27393}, {"year": 1998,"population": 29505}, {"year": 1999,"population": 32124}, {"year": 2000,"population": 33791}, {"year": 2001,"population": 35297}, {"year": 2002,"population": 36179}, {"year": 2003,"population": 36829}, {"year": 2004,"population": 37493}, {"year": 2005,"population": 38376}, {"year": 2006,"population": 39008}, {"year": 2007,"population": 39366}, {"year": 2008,"population": 39821}, {"year": 2009,"population": 40179}, {"year": 2010,"population": 40511}, {"year": 2011,"population": 40465}, {"year": 2012,"population": 40905}, {"year": 2013,"population": 41258}, {"year": 2014,"population": 41777} ]   },    {      "name": "annotation", "values": [ {"start": 1933,"end": 1945,"text": "Nazi rule"}, {         "start": 1948, "end": 1989, "text": "GDR (East Germany)" }     ]    }  ],  "scales": [ {     "name": "x", "type": "linear", "range": "width", "zero": false, "domain": {"data": "table","field": "year"} },   {      "name": "y", "type": "linear", "range": "height", "nice": true, "domain": {"data": "table","field": "population"} },   {      "name": "color", "type": "ordinal", "domain": {"data": "annotation","field": "text"}, "range": ["black","red"] } ],  "axes": [ {     "type": "x", "scale": "x", "format": "d", "title": "Year", "ticks": 15 },   {      "type": "y", "scale": "y", "title": "Population", "grid": true, "layer": "back" } ],  "marks": [ {     "type": "rect", "from": {"data": "annotation"}, "properties": { "enter": { "x": {"scale": "x","field": "start"}, "x2": {"scale": "x","field": "end"}, "y": {"value": 0}, "y2": {"signal": "height"}, "fill": {"scale": "color","field": "text"}, "opacity": {"value": 0.2} }     }    },    {      "type": "line", "from": {"data": "table"}, "properties": { "enter": { "interpolate": {"value": "monotone"}, "x": {"scale": "x","field": "year"}, "y": {"scale": "y","field": "population"}, "stroke": {"value": "steelblue"}, "strokeWidth": {"value": 3} }     }    },    {      "type": "symbol", "from": {"data": "table"}, "properties": { "enter": { "x": {"scale": "x","field": "year"}, "y": {"scale": "y","field": "population"}, "stroke": {"value": "steelblue"}, "fill": {"value": "white"}, "size": {"value": 30} }     }    },    {      "type": "text", "from": { "data": "table", "transform": [ {           "type": "aggregate", "summarize": {"year": ["min","max"]} }       ]      },      "properties": { "enter": { "x": {"signal": "width","mult": 0.5}, "y": {"value": -10}, "text": { "template": "Population of Falkensee from \u007b{datum.min_year}\u007d to \u007b{datum.max_year}\u007d" },         "fill": {"value": "black"}, "fontSize": {"value": 16}, "align": {"value": "center"}, "fontWeight": {"value": "bold"} }     }    }  ],  "legends": [ {     "fill": "color", "title": "Period", "properties": { "symbols": { "strokeWidth": {"value": 0}, "shape": {"value": "square"}, "opacity": {"value": 0.3} },       "legend": { "x": {"value": 10}, "y": {"value": 5}, "fill": {"value": "white"} }     }    }  ] }