Vega-lite visualization of the trees in one corner of San Francisco

trees-san-francisco.vl.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.1.json",
  "width": 700,
  "height": 800,
  "data": {
    "url": "https://san-francisco.datasettes.com/sf-trees-ebc2ad9.jsono?sql=select+latitude%2C+longitude%2C+qSpecies+from+Street_Tree_List+where+latitude+is+not+null and Latitude > 37.77 and Longitude < -122.45",
    "format": {
      "type": "json",
      "property": "rows"
    }
  },
  "projection": {
    "type": "albersUsa"
  },
  "mark": "point",
  "encoding": {
    "longitude": {
      "field": "Longitude",
      "type": "quantitative"
    },
    "latitude": {
      "field": "Latitude",
      "type": "quantitative"
    },
    "size": {
      "value": 1
    },
    "color": {
      "field": "qSpecies",
      "type": "nominal"
    }
  }
}