//add d3
d3 = require("d3@5")
//add topojson
topojson = require("topojson-client@3")
//import the json
bostonjson = d3.json('https://gist.githubusercontent.com/cesandoval/09b2e39263c748fbcb84b927cecc7c46/raw/ab71d3638efd2545ec99c2651c6f2ddcea9d2a07/boston.json')
//import the csv
csv311 = await d3.csv('https://gist.githubusercontent.com/cesandoval/046a91586ae76889aeb5b3e9db53016e/raw/ffb0c410ce8503c8c839cde01235bafb39cb14ad/bostosn_311.csv')
//import the csv
csv311_reg = await d3.csv('https://gist.githubusercontent.com/cesandoval/046a91586ae76889aeb5b3e9db53016e/raw/ffb0c410ce8503c8c839cde01235bafb39cb14ad/bostosn_311.csv')
color = d3.scaleQuantize()
.domain([1, 4])
.range(d3.schemePurples[9]);
//set the projection
bosProjection = d3.geoAlbers()
.scale( 190000 )
.rotate( [71.057,0] ) //longitude
.center( [0, 42.313] ) //latitude
.translate( [width/2,height/2] );
// Create GeoPath function that uses built-in D3 functionality to turn
// lat/lon coordinates into screen coordinates
path = d3.geoPath()
.projection( bosProjection );
width = 700
height = 600
{
// Create SVG
let svg = d3.select(DOM.svg(width, height));
let g = svg.append("g");
g.selectAll("path") //bind TopoJSON data
.data( topojson.feature(bostonjson, bostonjson.objects.boston_neigh).features ) // Bind TopoJSON data elements
.enter()
.append("path")
.attr("d", path)
// get rate value for property matching data ID
.style("fill", d => color(Math.log(csv311_twitterByNeighborhood[d.properties.OBJECTID])))
.style("stroke", "black");
return svg.node();
}
{
// Create SVG
let svg = d3.select(DOM.svg(width, height));
let g = svg.append("g");
tooltip1
g.selectAll("path") //bind TopoJSON data
.data( topojson.feature(bostonjson, bostonjson.objects.boston_neigh).features ) // Bind TopoJSON data elements
.enter()
.append("path")
.attr("d", path)
.style("fill", d => color(Math.log(csv311_twitterByNeighborhood[d.properties.OBJECTID]))) // get rate value for property matching data ID
.style("stroke", "black")
//on mouseover, show Name
.on("mouseover", d => tooltip1.style("visibility","visible").text(d.properties.id))
//on mousemove, show Name: Tweets
.on("mousemove", d => tooltip1.style("top", (d3.event.pageY-10)+"px").style("left", (d3.event.pageX+10)+"px").text(d.properties.Name + ": " + (csv311_twitterByNeighborhood[d.properties.OBJECTID]/500)*100+"%"))
//on mouseout, hide tooltip
.on("mouseout", d => tooltip1.style("visibility", "hidden"));
return svg.node();
}
tooltip1 = d3.select("body")
.append("div")
.style("position","absolute")
.style("opacity",.6) //60% opaque
.style("font-size", "12px")
.style("background","#fff") //white background color
.style("padding","5px"); //5 pixels of padding
legend = g => {
const x = d3.scaleLinear()
.domain(d3.extent(color.domain()))
.rangeRound([0, 250]);
g.selectAll("rect")
.data(color.range().map(d => color.invertExtent(d)))
.join("rect")
.attr("height", 10)
.attr("x", d => x(d[0]))
.attr("width", d => x(d[1]) - x(d[0]))
.attr("fill", d => color(d[0]));
g.append("text")
.attr("x", x.range()[0])
.attr("y", 50)
.attr("fill", "currentColor")
.attr("text-anchor", "start")
.attr("font-weight", "bold")
.text("Tweets per neighborhood (log scale)");
g.call(d3.axisBottom(x)
.tickSize(13)
.tickFormat(d => d3.format(".2n")(d)) //defining decimal numbers
.tickValues(color.range().slice(1).map(d => color.invertExtent(d)[0])))
.select(".domain")
.remove();
}
{
// Create SVG
let svg = d3.select(DOM.svg(width, height));
tooltip1
let g = svg.append("g")
.call(legend);
g.selectAll("path") //bind TopoJSON data
.data( topojson.feature(bostonjson, bostonjson.objects.boston_neigh).features ) // Bind TopoJSON data elements
.enter()
.append("path")
.attr("d", path)
.style("fill", d => color(Math.log(csv311_twitterByNeighborhood[d.properties.OBJECTID]))) // get rate value for property matching data ID
.style("stroke", "black")
//on mouseover, show Name
.on("mouseover", d => tooltip1.style("visibility","visible").text(d.properties.id))
//on mousemove, show Name: Tweets
.on("mousemove", d => tooltip1.style("top", (d3.event.pageY-10)+"px").style("left", (d3.event.pageX+10)+"px").text(d.properties.Name + ": " + (csv311_twitterByNeighborhood[d.properties.OBJECTID]/500)*100+"%"))
//on mouseout, hide tooltip
.on("mouseout", d => tooltip1.style("visibility", "hidden"));
return svg.node();
}
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