vega-lite-q3

vega-lite-q3

{
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "width": "container",
  "height": "container",
  "data": {
    "url": "https://raw.githubusercontent.com/vda-lab/vda-lab.github.io/master/assets/station_366.json"
  },
  "transform": [
    {
      "filter": {"field": "endstation_id", "equal": "336"}
    }
  ],
  "selection": {
    "grid": {
      "type": "interval", "bind": "scales"
    }
  },
  "mark": "circle",
  "encoding": {
    "x": {"field": "startstation_longitude", "type": "quantitative","axis": {"title": "longitude"}},
    "y": {"field": "startstation_latitude", "type": "quantitative","axis": {"title": "latitude"}},
    "size": {
      "aggregate": "count"
    },
    "opacity": {
      "value": 0.7
    }
}
}