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geo_point.vg.json
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geo_point.vg.json
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{
"$schema": "https://vega.github.io/schema/vega/v5.json",
"background": "white",
"padding": 5,
"width": 500,
"height": 300,
"style": "view",
"data": [
{
"name": "source_0",
"url": "data/airports.csv",
"format": {"type": "csv"},
"transform": [
{
"type": "geojson",
"fields": ["longitude", "latitude"],
"signal": "geojson_0"
},
{
"type": "geopoint",
"projection": "projection",
"fields": ["longitude", "latitude"],
"as": ["x", "y"]
}
]
}
],
"projections": [
{
"name": "projection",
"size": {"signal": "[width, height]"},
"fit": {"signal": "geojson_0"},
"type": "albersUsa"
}
],
"marks": [
{
"name": "marks",
"type": "symbol",
"style": ["circle"],
"from": {"data": "source_0"},
"encode": {
"update": {
"opacity": {"value": 0.7},
"fill": {"value": "#4c78a8"},
"ariaRoleDescription": {"value": "circle"},
"description": {
"signal": "\"longitude: \" + (format(datum[\"longitude\"], \"\")) + \"; latitude: \" + (format(datum[\"latitude\"], \"\"))"
},
"x": {"field": "x"},
"y": {"field": "y"},
"size": {"value": 10},
"shape": {"value": "circle"}
}
}
}
],
"config": {"style": {"cell": {"stroke": "transparent"}}}
}