Public
Edited
Nov 12, 2020
1 star
Insert cell
Insert cell
map = {
const svg = d3
.create("svg")
.attr("width", w)
.attr("height", h)
.attr("viewBox", [0, 0, w, h])

let map = svg
.append('g')
const s = 6
map.selectAll('.point')
.data(weather_data)
.enter()
.append('rect')
.attr('width', s)
.attr('height', s)
.attr('class', 'point')
.attr('transform', d => {
let p = projection([d.X, d.Y])
return `translate(${p[0]-s/2} ${p[1]-s/2})`
})
.attr('fill', d => temp_color(d.Value))
let screen = map.append('g')
.attr('class', 'screen')
screen.append('rect')
.attr('width', w*1.2)
.attr('height', h*1.2)
.attr('x', -w*0.1)
.attr('y', -h*0.1)
.attr('class', 'screenrect')
screen
.selectAll(".subunit")
.data(provinces.features)
.enter()
.append("path")
.attr("class", "subunit")
.attr("d", path)
map
.append('path')
.datum(topojson.merge(italy, italy.objects.subunits.geometries))
.attr("d", path)
.attr("class", "italy")
map
.append('path')
.datum(topojson.mesh(italy, italy.objects.subunits, (a,b) => a !== b && usu.get(a.id).codice_regione == usu.get(b.id).codice_regione))
.attr("d", path)
.attr("class", "subunits_borders")
map
.append('path')
.datum(topojson.mesh(italy, italy.objects.subunits, (a,b) => a !== b && usu.get(a.id).codice_regione != usu.get(b.id).codice_regione))
.attr("d", path)
.attr("class", "units_borders")
/*
map
.selectAll('.bubble')
.data(provinces.features)
.enter()
.append('g')
.attr('transform', d => {
let point = projection([usu.get(d.id).long, usu.get(d.id).lat])
return `translate(${point[0]} ${point[1]})`
})
.append('circle')
.attr('r', d => Math.random()*5)
.attr("class", "bubble")
*/
// zoom
function zoomed() {
map.attr('transform', d3.event.transform)
map.selectAll('.bubble').attr('transform', `scale(${1/d3.event.transform.k})`)
}
svg.call(d3.zoom()
.scaleExtent([0, Infinity])
.on('zoom', zoomed))
return svg.node()
}
Insert cell
Insert cell
Insert cell
Insert cell
html`
<style>
.italy {
fill: none;
stroke: #222;
stroke-width: 0.5;
vector-effect: non-scaling-stroke;
}
.subunit {
fill: #777;
}
.subunits_borders {
fill: none;
stroke: #999;
stroke-width: 0.5;
vector-effect: non-scaling-stroke;
mix-blend-mode: multiply;
}
.screen {
mix-blend-mode: screen;
}
.screenrect {
fill: white;
}
.units_borders {
fill: none;
stroke: #222;
stroke-width: 0.5;
vector-effect: non-scaling-stroke;
mix-blend-mode: multiply;
}
.bubble {
fill: black;
fill-opacity: 0.2;
stroke: black;
stroke-width: 0.75;
vector-effect: non-scaling-stroke;
pointer-events: none;
}
</style>
`
Insert cell
temp_color = d3.scaleLinear()
.domain([-10,0,15,20])
.range([d3.hcl(290,70,15),d3.hcl(230,70,45),d3.hcl(80,70,75),d3.hcl(10,70,45)])
.interpolate(d3.interpolateHcl)
Insert cell
Insert cell
Insert cell
weather_data = d3.csvParse(await FileAttachment("Temperatura_media_anno.csv").text(), d3.autoType)
Insert cell
units_subunits_data = d3.csvParse(await FileAttachment("units_subunits.csv").text(), d3.autoType)
Insert cell
usu = new Map(units_subunits_data.map(d => [d.codice_provincia, d]))
Insert cell
Insert cell
italy = FileAttachment("italy.json").json()
Insert cell
provinces = topojson.feature(italy, italy.objects.subunits)
Insert cell
Insert cell
Insert cell
projection = d3.geoAzimuthalEqualArea() // Lambert equal-area
.rotate([-9, -53]) // centered in Germany
.fitExtent([[0, 0], [w, h]], provinces)
Insert cell
path = d3.geoPath().projection(projection)
Insert cell
Insert cell
Insert cell
Insert cell

One platform to build and deploy the best data apps

Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.
Learn more