Week 11: Choropleth Map

childMortality_2015.csv

countries.json

d3-legend.min.js

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index.html

<!DOCTYPE html>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<style>


body {
    font-family: Helvetica, sans-serif;

}

.countries {
    stroke: #fff;
    stroke-width:1px;
}

.countries:hover{
    opacity: .7;
}

.legendLinear text {
    font-size: 9px;
}

/*.d3-tip {
    font-weight: bold;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.5);
    color: #0099FF;
    border-radius: 2px;
}*/

svg {
    display: block;
    margin: auto;
}


</style>
<body>

    <h2>Under-Five Mortality Rates (per 1000 live births) in the World in 2015</h2>
    <p>Compared to the rest of the world, Sub-Saharan Africa and South Asia experience the highest rates of mortality in the World.</p>
    <p>Source: <a href="http://data.worldbank.org/indicator/SH.DYN.MORT">WHO</a>. Data shown is most recent data for countries with data available.</p>

    <div id="vis"></div>

<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/queue.v1.min.js"></script>
<script src="d3-legend.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script src="tooltip.js"></script>
<script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>

<script>

var width = 1300,
    height = 600;

// var tip = d3.tip()
//   .attr('class', 'd3-tip')
//   // .offset([-2, 0])
//   .html(function(d) {
//     var dataRow = countryById.get(d.id);
//     if (dataRow) {
//         return d.properties.name + ": " + dataRow.mortality;
//     } else {
//         console.log("no dataRow", d);
//         return d.properties.name + ": No data.";
//     }
//   })

var svg = d3.select('#vis').append('svg')
    .attr('width', width)
    .attr('height', height)
    .call(d3.behavior.zoom()
    .on("zoom", redraw))
    .append("g");
    // .call(tip);



function redraw() {
    svg.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}



var projection = d3.geo.mercator()
    .scale(225) // mess with this if you want
    .translate([width / 2, height / 2]);

var path = d3.geo.path()
    .projection(projection);

var colorScale = d3.scale.linear().range(["#d1e5f0","#b2182b"]).interpolate(d3.interpolateLab);
// var colorScale = d3.scale.linear().range(["#fff5f0", "#67000d"]).interpolate(d3.interpolateLab);
// var colorScale = d3.scale.category20();

var countryById = d3.map();

// we use queue because we have 2 data files to load.
queue()
    .defer(d3.json, "countries.json")
    .defer(d3.csv, "childMortality_2015.csv", typeAndSet) // process
    .await(loaded);


function typeAndSet(d) {
    d.mortality = +d.mortality;
    countryById.set(d.ISO3, d);
    return d;
}

function getColor(d) {
    var dataRow = countryById.get(d.id);
    if (dataRow) {
        console.log(dataRow);
        return colorScale(dataRow.mortality);
    } else {
        console.log("no dataRow", d);
        return "rgba(0, 0, 0, 0.7)";
    }
}

function getText(d) {
    var dataRow = countryById.get(d.id);
    if (dataRow) {
        return "<strong>" + d.properties.name + "</strong>" + ": " + dataRow.mortality;
    } else {
        console.log("no dataRow", d);
        return "<strong>" + d.properties.name + "</strong>" + ": No data.";
    }
}

function loaded(error, countries, mortalityRate) {

    console.log(countries);
    console.log(mortalityRate);
    // console.log(malaria);

    colorScale.domain(d3.extent(mortalityRate, function(d) {return d.mortality;}));
    

    var countries = topojson.feature(countries, countries.objects.units).features;


    // svg.append("rect").attr("width", "100%")
    // .attr("height", "100%")
    // .attr("fill", "rgba(166,206,227,0.2)");

    svg.selectAll('path.countries')
        .data(countries)
        .enter()
        .append('path')
        .attr('class', 'countries')
        .attr('d', path)
        // .on('mouseover', tip.show)
        // .on('mouseout', tip.hide)
        .attr('fill', function(d,i) {
            console.log(d.properties.name);
            return getColor(d);
        })
        .call(d3.helper.tooltip(
            function(d, i){
                return getText(d);
            })); //tooltip based in an example from Roger Veciana: http://bl.ocks.org/rveciana/5181105
        // .append("title")
        // .text(function(d) {
        //     return getText(d);
        // });
    

    var linear = colorScale;

    svg.append("g")
      .attr("class", "legendLinear")
      .attr("transform", "translate(20,20)");

    var legendLinear = d3.legend.color()
      .shapeWidth(30)
      .orient('horizontal')
      .scale(linear);

    svg.select(".legendLinear")
      .call(legendLinear);

}

</script>
</body>
</html>

thumbnail.png

tooltip.js

//tooltip based in an example from Roger Veciana: http://bl.ocks.org/rveciana/5181105

d3.helper = {};

d3.helper.tooltip = function(accessor){
    return function(selection){
        var tooltipDiv;
        var bodyNode = d3.select('body').node();
        selection.on("mouseover", function(d, i){
            // Clean up lost tooltips
            d3.select('body').selectAll('div.tooltip').remove();
            // Append tooltip
            tooltipDiv = d3.select('body').append('div').attr('class', 'tooltip');
            var absoluteMousePos = d3.mouse(bodyNode);
            tooltipDiv.style('left', (absoluteMousePos[0] + 10)+'px')
                .style('top', (absoluteMousePos[1] - 15)+'px')
                .style('position', 'absolute')
                .style('z-index', 1001)
                .style('border-radius', '2px')
                .style('color', '#0099FF')
                .style('padding', '10px 15px')
                .style('background', 'rgba(255, 255, 255, 0.7)');
            // Add text using the accessor function
            var tooltipText = accessor(d, i) || '';
            // Crop text arbitrarily
            //tooltipDiv.style('width', function(d, i){return (tooltipText.length > 80) ? '300px' : null;})
            //    .html(tooltipText);
        })
        .on('mousemove', function(d, i) {
            // Move tooltip
            var absoluteMousePos = d3.mouse(bodyNode);
            tooltipDiv.style('left', (absoluteMousePos[0] + 10)+'px')
                .style('top', (absoluteMousePos[1] - 15)+'px');
            var tooltipText = accessor(d, i) || '';
            tooltipDiv.html(tooltipText);
        })
        .on("mouseout", function(d, i){
            // Remove tooltip
            tooltipDiv.remove();
        });

    };
};