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geo_custom_projection.vg.json
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geo_custom_projection.vg.json
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{
"$schema": "https://vega.github.io/schema/vega/v5.json",
"background": "white",
"padding": 5,
"width": 900,
"height": 560,
"style": "view",
"data": [
{
"name": "source_0",
"url": "data/us-10m.json",
"format": {"type": "topojson", "feature": "states"}
},
{
"name": "source_1",
"url": "data/airports.csv",
"format": {"type": "csv"},
"transform": [
{
"type": "geopoint",
"projection": "projection",
"fields": ["longitude", "latitude"],
"as": ["layer_1_x", "layer_1_y"]
}
]
}
],
"projections": [
{
"name": "projection",
"translate": [1200, 700],
"type": "albersUsa",
"scale": 3000
}
],
"marks": [
{
"name": "layer_0_marks",
"type": "shape",
"clip": true,
"style": ["geoshape"],
"from": {"data": "source_0"},
"encode": {
"update": {
"fill": {"value": "#ccc"},
"stroke": {"value": "#fff"},
"ariaRoleDescription": {"value": "geoshape"}
}
},
"transform": [{"type": "geoshape", "projection": "projection"}]
},
{
"name": "layer_1_marks",
"type": "symbol",
"clip": true,
"style": ["circle"],
"from": {"data": "source_1"},
"encode": {
"update": {
"opacity": {"value": 0.7},
"fill": {"value": "#4c78a8"},
"ariaRoleDescription": {"value": "circle"},
"description": {
"signal": "\"longitude: \" + (format(datum[\"longitude\"], \"\")) + \"; latitude: \" + (format(datum[\"latitude\"], \"\"))"
},
"x": {"field": "layer_1_x"},
"y": {"field": "layer_1_y"},
"size": {"value": 10},
"shape": {"value": "circle"}
}
}
}
],
"config": {"style": {"cell": {"stroke": null}}}
}