Published
Edited
Apr 22, 2019
//import {chart} from "@mbostock/d3-choropleth"
import {chart as choropleth} from "@chagel/d3-choropleth"
choropleth
bosNeighborhoods = d3.json('https://gist.githubusercontent.com/jdev42092/5c285c4a3608eb9f9864f5da27db4e49/raw/a1c33b1432ca2948f14f656cc14c7c7335f78d95/boston_neighborhoods.json')
width = 700;
height = 580;
{
// Create SVG
let svg = d3.select( "body" )
.append( "svg" )
.attr( "width", width )
.attr( "height", height );
// Append empty placeholder g element to the SVG
// g will contain geometry elements
let g = svg.append( "g" );
return svg.node();
}
bosProjection = d3.geoAlbers()
.scale( 190000 )
.rotate( [71.057,0] )
.center( [0, 42.313] )
.translate( [width/2,height/2] );
// Create GeoPath function that uses built-in D3 functionality to turn
// lat/lon coordinates into screen coordinates
bos_geoPath = d3.geoPath()
.projection(bosProjection)
newbosProjection = d3.geoEquirectangular()
.scale( 190000 )
.rotate( [71.057,0] )
.center( [0, 42.313] )
.translate( [width/2,height/2] );
//create new projection object
newbos_geoPath = d3.geoPath()
.projection(newbosProjection)
{
// Create SVG
let svg = d3.select(DOM.svg(width, height));
// Append empty placeholder g element to the SVG
// g will contain geometry elements
let g = svg.append("g");
// Classic D3... Select non-existent elements, bind the data, append the elements, and apply attributes
g.selectAll( "path" )
.data( bosNeighborhoods.features )
.enter()
.append( "path" )
.attr( "fill", "#ccc" )
.attr( "stroke", "#333")
.attr( "d", bos_geoPath );
return svg.node();
}
rodentData = d3.json('https://gist.githubusercontent.com/jdev42092/ee94f6d469d7084e8dca4e8533817e0e/raw/7cfd6c34c974d3a86ff19c6180cfa22ee9ce3946/boston_rodents.json')
{
// Create SVG
let svg = d3.select(DOM.svg(width, height));
// Append empty placeholder g element to the SVG
// g will contain geometry elements
let g = svg.append( "g" );
let rodents = svg.append( "g" );
// Classic D3... Select non-existent elements, bind the data, append the elements, and apply attributes
g.selectAll( "path" )
.data( bosNeighborhoods.features )
.enter()
.append( "path" )
.attr( "fill", "#ccc" )
.attr( "stroke", "#333")
.attr( "d", bos_geoPath );
rodents.selectAll( "path" )
.data( rodentData.features )
.enter()
.append( "path" )
.attr( "fill", "#900" )
.attr( "stroke", "#999" )
.attr( "d", bos_geoPath );
return svg.node();
}
html`
<style>
.incident {
fill : steelblue;
stroke : none;
opacity : 0.5;
}
</style>
}`
//not sure what is meant herez
]
// your code here
//instead the rodents are drawn first and the map is drawn second (on top) when we flip the order of how we draw the geometry code (g) and the location code (rodents)
{
// Create SVG
let svg = d3.select(DOM.svg(width, height));
// Append empty placeholder g element to the SVG
// g will contain geometry elements
let rodents = svg.append( "g" );
let g = svg.append( "g" );
// Classic D3... Select non-existent elements, bind the data, append the elements, and apply attributes
rodents.selectAll( "path" )
.data( rodentData.features )
.enter()
.append( "path" )
.attr( "fill", "#900" )
.attr( "stroke", "#999" )
.attr( "d", bos_geoPath );
g.selectAll( "path" )
.data( bosNeighborhoods.features )
.enter()
.append( "path" )
.attr( "fill", "#ccc" )
.attr( "stroke", "#333")
.attr( "d", bos_geoPath );
return svg.node();
}
{
// Create SVG
let svg = d3.select(DOM.svg(width, height));
// Append empty placeholder g element to the SVG
// g will contain geometry elements
let g = svg.append( "g" );
let rodents = svg.append( "g" );
// Classic D3... Select non-existent elements, bind the data, append the elements, and apply attributes
g.selectAll( "path" )
.data( bosNeighborhoods.features )
.enter()
.append( "path" )
.attr( "fill", "#ccc" )
.attr( "stroke", "#333")
.attr( "d", bos_geoPath );
rodents.selectAll( "path" )
.data( rodentData.features )
.enter()
.append( "path" )
.attr( "fill", "steelblue" )
.attr( "stroke", "none" )
.attr( "opacity", 0.5)
.attr( "d", bos_geoPath )
.attr("class", "incident")
.on("mouseover", d => d3.select("#label").text(d.properties.LOCATION_STREET_NAME))
.on("mouseout", d => d3.select("#label").text("Empty Selection"));
return svg.node();
}
// html`
// <style>
// .incident {
// fill : steelblue;
// stroke : none;
// opacity : 0.5;
// }
// </style>
//
{
// Create Event Handlers for mouse
function handleMouseOver(d, i) { // Add interactivity
// Use D3 to select element, change color and size
d3.select(this)
.attr("fill", "orange");
}
function handleMouseOut(d, i) {
// Use D3 to select element, change color back to normal
d3.select(this).attr({
fill: "steelblue"
});
}
}
// your code here
topojson = require("topojson-client@3")
topodata = d3.json("https://unpkg.com/us-atlas@1/us/10m.json")
path = d3.geoPath();
//since we dont need to specify a projecttion
{
let width = 960;
let height = 600;
// Create SVG
let svg = d3.select(DOM.svg(width, height));
let g = svg.append("g");
// Bind TopoJSON data
g.selectAll("path")
.data(topojson.feature(topodata, topodata.objects.counties).features) // Bind TopoJSON data elements
.enter().append("path")
.attr("d", path)
.style("fill", "white")
.style("stroke", "black");
return svg.node();
}
// your code here
{
let width = 960;
let height = 600;
// Create SVG
let svg = d3.select(DOM.svg(width, height));
let g = svg.append("g");
// Bind TopoJSON data
g.selectAll("path")
.data(topojson.feature(topodata, topodata.objects.states).features) // Bind TopoJSON data elements
.enter().append("path")
.attr("d", path)
.style("fill", "white")
.style("stroke", "black");
return svg.node();
}
//yay that was easy
unemployment = d3.tsv("https://gist.githubusercontent.com/jdev42092/9a314291805640a097e16e58248627eb/raw/365c199c5a173a0018608615b6823b5cdcaa6bae/unemployment.tsv", ({id, rate}) => ({county: id, rate : +rate}))
unemp_data = {
// Create empty object for holding dataset
const rateById = {};
// Create property for each ID, give it value from rate
unemployment.forEach(d => (rateById[d.county] = +d.rate));
return rateById;
}
color = d3.scaleQuantize()
.domain([1, 10])
.range(d3.schemePurples[9]);
unemployment // all the tsv data
unemp_data //pulls out the rate values by each county value (ID)
{
let width = 960;
let height = 600;
// Create SVG
let svg = d3.select(DOM.svg(width, height));
let g = svg.append("g");
// Create empty object for holding dataset
const rateById = {};
// Create property for each ID, give it value from rate
unemployment.forEach(d => (rateById[d.county] = +d.rate));
// Bind TopoJSON data
g.selectAll("path")
.data(topojson.feature(topodata, topodata.objects.counties).features) // Bind TopoJSON data elements
.enter().append("path")
.attr("d", path)
.style("fill", d => color(rateById[d.id])) // get rate value for property matching data ID
// pass rate value to color function, return color based on domain and range
.style("stroke", "green");
return svg.node();
}
{
let width = 960;
let height = 600;
// Create SVG
let svg = d3.select(DOM.svg(width, height));
let g = svg.append("g");
// Create empty object for holding dataset
const rateById = {};
// Create property for each ID, give it value from rate
unemployment.forEach(d => (rateById[d.county] = +d.rate));
// Bind TopoJSON data
g.selectAll("path")
.data(topojson.feature(topodata, topodata.objects.counties).features) // Bind TopoJSON data elements
.enter().append("path")
.attr("d", path)
.style("fill", d => color(rateById[d.id]));
//we removed the stroke propery from the counties append
g.append("path")
.datum(topojson.mesh(topodata, topodata.objects.states, (a, b) => a !== b))
.attr("fill", "none")
.attr("stroke", "white")
.attr("d", path);
return svg.node();
}
topodata
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