<!DOCTYPE html>
<meta charset="utf-8">
<!-- Include d3 library -->
<script src="https://d3js.org/d3.v7.min.js"></script>
<!-- Create a container to host the chart -->
<div id="viz_container"></div>
// set the dimensions and margins of the graph
const margin = {top: 50, right: 20, bottom: 50, left: 40};
const width = 450 - margin.left - margin.right;
const height = 350 - margin.top - margin.bottom;
// append the svg object to the body of the page
const svg = d3.select("#viz_container")
.append("svg")
.attr("width", "100%")
.attr("height", "100%")
.attr("viewBox", "0 0 450 350")
.attr("preserveAspectRatio", "xMinYMin")
.append("g")
.attr("transform", `translate(${margin.left}, ${margin.top})`);
// parse the data
d3.csv("https://raw.githubusercontent.com/GDS-ODSSS/unhcr-dataviz-platform/master/data/change_over_time/area_d3.csv").
then(function(data){
// X scale and Axis
const parseTime = d3.timeParse("%Y")
const xScale = d3.scaleTime()
.domain(d3.extent(data, d => parseTime(d.year))).nice()
.range([0, width])
svg
.append('g')
.attr("transform", `translate(0, ${height})`)
.call(d3.axisBottom(xScale).tickSize(0).tickPadding(8));
// Y scale and Axis
const formater = d3.format("~s")
const yScale = d3.scaleLinear()
.domain([0, d3.max(data, d => +d.refugee_number)])
.range([height, 0]);
svg
.append('g')
.call(d3.axisLeft(yScale).ticks(6).tickSize(0).tickPadding(6).tickFormat(formater))
.call(d => d.select(".domain").remove()
);
// set horizontal grid line
const GridLine = () => d3.axisLeft().scale(yScale);
svg
.append("g")
.attr("class", "grid")
.call(GridLine()
.tickSize(-width,0,0)
.tickFormat("")
.ticks(6)
);
// draw graph
svg
.append("path")
.datum(data)
.attr("fill", "#0072BC")
.attr("d", d3.area()
.x(d => xScale(parseTime(d.year)))
.y0(yScale(0))
.y1(d => yScale(+d.refugee_number))
);
// set title
svg
.append("text")
.attr("class", "chart-title")
.attr("x", -(margin.left)*0.7)
.attr("y", -(margin.top)/1.5)
.attr("text-anchor", "start")
.text("Number of refugees | 1991-2021")
// set Y axis label
svg
.append("text")
.attr("class", "chart-label")
.attr("x", -(margin.left)*0.7)
.attr("y", -(margin.top/4))
.attr("text-anchor", "start")
.text("Displaced population (millions)")
// set source
svg
.append("text")
.attr("class", "chart-source")
.attr("x", -(margin.left)*0.7)
.attr("y", height + margin.bottom*0.7)
.attr("text-anchor", "start")
.text("Source: UNHCR Refugee Data Finder")
// set copyright
svg
.append("text")
.attr("class", "copyright")
.attr("x", -(margin.left)*0.7)
.attr("y", height + margin.bottom*0.9)
.attr("text-anchor", "start")
.text("©UNHCR, The UN Refugee Agency")
})
