Week 11: Choropleth Map

contraceptive-data-recent-only.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;
    padding: 40px;
}

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

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


</style>
<body>

    <h2>Contraceptive Prevalence Worldwide</h2>
    <p>Source: <a href="http://data.worldbank.org/indicator/SP.DYN.CONU.ZS?page=6">World Bank</a>. Data shown is most recent data since 2005 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="world-data.js"></script>

</body>
</html>

world-data.js

var width = 1000,
    height = 600;

var svg = d3.select('#vis').append('svg')
    .attr('width', width)
    .attr('height', height);

var projection = d3.geo.mercator()
    .scale(150) // mess with this if you want
    .translate([width / 2, height / 2]);

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

//var colorScale = d3.scale.ordinal().range(['#105B63', '#9ADEB4',  '#FFD34E',  '#DB9E36', '#BD4932']);
var colorScale = d3.scale.linear().range(["#FF7F66", "#2185C5"]).interpolate(d3.interpolateLab);

var countryById = d3.map();

var myTooltip = d3.select("body")
    .append("div")
    .attr("class", "myTooltip");


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

function typeAndSet(d) {
    d.recent = +d.recent;
    countryById.set(d.CountryCode, d);
//    console.log("countryById", countryById);    
//    console.log("d", d);
    return d;
}

function getColor(d) {
//    console.log("getColor d", d);
    var dataRow = countryById.get(d.id);
//            console.log("dataRow", dataRow);
//            console.log("d.id", d.id);
        console.log("d", d);
    if (dataRow) {
        return colorScale(dataRow.recent);
    } else {
        console.log("no dataRow", d);
        return "#EBEBEB";
    }
}

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

function loaded(error, world, data) {

    console.log("world", world);
    console.log("data", data);

    colorScale.domain(d3.extent(data, function(d) {return d.recent;}));

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

    svg.selectAll('path.countries')
        .data(countries)
        .enter()
        .append('path')
        .attr('class', 'countries')
        .attr('d', path)
        .attr('fill', function(d,i) {
            return getColor(d);
        })
        .append("title")
        .text(function(d) {
            return getText(d);
        });

    var linear = colorScale;

    svg.append("g")
      .attr("class", "legendLinear")
      .attr("transform", "translate(20, 475)");

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

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

 /*======================================================================
      Mouse Events
    ======================================================================*/

//    [element]
//        .on("mouseover", mouseoverFunc)
//        .on("mousemove", mousemoveFunc)
//        .on("mouseout", mouseoutFunc);
//
//
//    function mouseoverFunc(d) {
//      console.log("moused over", d.x);
////            myTooltip
////            .style("display", null)
////            .html("<p><span class='tooltipHeader'>" + d.x + "</span><br>"+ d.method + ": " + d3.format("%")(d.y) + "</p>");
////        
//    }
//
//    function mousemoveFunc(d) {
//        myTooltip
//            .style("top", (d3.event.pageY - 5) + "px")
//            .style("left", (d3.event.pageX + 10) + "px");
//    }
//    
//    function mouseoutFunc(d) {
//        return myTooltip.style("display", "none"); // this sets it to invisible!
//    }

    /*======================================================================
    ======================================================================*/