Published
Edited
Nov 27, 2021
1 star
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{
// ZOOM: attempt at zoom with mouse
// MAP DRAWING
return vl.markGeoshape({fill: '#f2f2f2', stroke: '#fff', strokeWidth: 2})
.data(
vl.topojson('data/us-10m.json')
.feature('states')
)
// adding parameters from the zoom to this map element
// .params(panzoom)
// the projection
.project(
vl.projection('mercator')
//.scale(vl.expr('zoom'))
// .center(vl.expr('[leftRight, upDown]'))
// .center(-117,47.5) // first number left-right, second number up-down
)
.render()
}
// range inputs can be used for paning and zooming, the snipped below can be added to add sliders
// .params(
// vl.param('zoom')
// .value(500)
// .bind(vl.slider(500,30000,1)),
// vl.param('leftRight')
// .value(-117)
// .bind(vl.slider(-300,300,0.25)),
// vl.param('upDown')
// .value(47.5)
// .bind(vl.slider(0,200,0.5))
// )
vl.markCircle()
.data(randomData)
.params(
vl.selectInterval()
.bind('scales')
)
.encode(
vl.x().fieldQ('Active Jobs'),
vl.y().fieldQ('Sponsored')
)
.render()
{
"$schema": "https://vega.github.io/schema/vega/v5.json",
"description": "An interactive world map supporting pan and zoom.",
"width": 900,
"height": 500,
"autosize": "none",
"signals": [
{ "name": "tx", "update": "width / 2" },
{ "name": "ty", "update": "height / 2" },
{
"name": "scale",
"value": 150,
"on": [{
"events": {"type": "wheel", "consume": true},
"update": "clamp(scale * pow(1.0005, -event.deltaY * pow(16, event.deltaMode)), 150, 3000)"
}]
},
{
"name": "angles",
"value": [0, 0],
"on": [{
"events": "mousedown",
"update": "[rotateX, centerY]"
}]
},
{
"name": "cloned",
"value": null,
"on": [{
"events": "mousedown",
"update": "copy('projection')"
}]
},
{
"name": "start",
"value": null,
"on": [{
"events": "mousedown",
"update": "invert(cloned, xy())"
}]
},
{
"name": "drag", "value": null,
"on": [{
"events": "[mousedown, window:mouseup] > window:mousemove",
"update": "invert(cloned, xy())"
}]
},
{
"name": "delta", "value": null,
"on": [{
"events": {"signal": "drag"},
"update": "[drag[0] - start[0], start[1] - drag[1]]"
}]
},
{
"name": "rotateX", "value": 0,
"on": [{
"events": {"signal": "delta"},
"update": "angles[0] + delta[0]"
}]
},
{
"name": "centerY", "value": 0,
"on": [{
"events": {"signal": "delta"},
"update": "clamp(angles[1] + delta[1], -60, 60)"
}]
}
],
"projections": [
{
"name": "projection",
"type": "mercator",
"scale": {"signal": "scale"},
"rotate": [{"signal": "rotateX"}, 0, 0],
"center": [0, {"signal": "centerY"}],
"translate": [{"signal": "tx"}, {"signal": "ty"}]
}
],
"data": [
{
"name": "world",
"url": "data/world-110m.json",
"format": {
"type": "topojson",
"feature": "countries"
}
},
{
"name": "graticule",
"transform": [
{ "type": "graticule", "step": [15, 15] }
]
}
],
"marks": [
{
"type": "shape",
"from": {"data": "graticule"},
"encode": {
"enter": {
"strokeWidth": {"value": 1},
"stroke": {"value": "#ddd"},
"fill": {"value": null}
}
},
"transform": [
{ "type": "geoshape", "projection": "projection" }
]
},
{
"type": "shape",
"from": {"data": "world"},
"encode": {
"enter": {
"strokeWidth": {"value": 0.5},
"stroke": {"value": "#bbb"},
"fill": {"value": "#e5e8d3"}
}
},
"transform": [
{ "type": "geoshape", "projection": "projection" }
]
}
]
}
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Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
