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HTML

              
                <div class="continer">
	<div class="header">
		<h1>Map of Meteorites Landing<br> around the world </h1>
	</div>
	
	<div id="map">
	</div>
</div>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Patua+One')

body
	background-color: #F5F5DC

.header
	text-align: center
	font-family: 'Patua One', cursive
	color: #66CCCC
	text-shadow: 5px 3px 7px #000

#map
	border: 1px solid #000
	margin: 40px
	box-shadow: 5px 5px 7px #555

.tooltip
	position: absolute         
	text-align: left          
	width: auto                 
	height: auto                
	padding: 20px             
	font: 1em
	background: hsla(0, 0%, 100%, .8)
	pointer-events: none         
	box-shadow: 0 5px 10px hsla(0, 0%, 0%, .2)
	line-height: 1.5em
              
            
!

JS

              
                var width = "100%",
    height = "800px",
    sizeModifier = 50,
    hue = 0, colors = {},
    meteorites;

var projection = d3.geo.mercator()
  .translate([780,360])
  .scale(300);

var zoom = d3.behavior.zoom()
  .translate([0, 0])
  .scale(1)
  .scaleExtent([.5, 18])
  .on("zoom", zoomed);

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

var svg = d3.select('#map')
  .append("svg")
  .attr("width", "100%")

// Set background color
svg.append("rect")
  .attr("width", width)
  .attr("height", height)
  .attr("fill", "#0099CC")
  .call(zoom)


d3.select(window).on("resize", sizeChange);

// Tooltip
var div = d3.select("body").append("div")
  .attr("class", "tooltip")
  .style("opacity", 0);

var map = svg.append("g");

// Map of earth
d3.json("https://d3js.org/world-50m.v1.json", function(json) {
  map.selectAll("path")
    .data(topojson.feature(json, json.objects.countries).features)
    .enter()
    .append("path")
    .attr("fill", "#008000")
    .attr("stroke", "#0099CC")
    .attr("d", path)
    //.call(zoom) // This is super jittery for some reason
});

// Data points
d3.json('https://data.nasa.gov/resource/y77d-th95.geojson', function(json) {

  json.features.sort(function(a,b) {
    return new Date(a.properties.year) - new Date(b.properties.year);
  })
  json.features.map(function(e) {
    hue+=.35;
    colors[e.properties.year] = hue;
    e.color = 'hsl(' + hue + ',100%, 50%)';
  })

  json.features.sort(function(a,b) {
    return b.properties.mass - a.properties.mass
  })

  meteorites = svg.append('g')
  .selectAll('path')
    .data(json.features)
    .enter()
      .append('circle')
      .attr('cx', function(d) { return projection([d.properties.reclong,d.properties.reclat])[0] })
      .attr('cy', function(d) { return projection([d.properties.reclong,d.properties.reclat])[1] })
      .attr('r', function(d) { 
        var range = 718750/2/2;
    
        if (d.properties.mass <= range) return 2;
        else if (d.properties.mass <= range*2) return 10;
        else if (d.properties.mass <= range*3) return 20;
        else if (d.properties.mass <= range*20) return 30;
        else if (d.properties.mass <= range*100) return 40;
        return 50;
      })
      .attr('fill-opacity', function(d) {
        var range = 718750/2/2;
        if (d.properties.mass <= range) return 1;
        return .5;
      })
      .attr('stroke-width', 1)
      .attr('stroke', '#EAFFD0')
      .attr('fill', function(d) { return d.color })
      .on('mouseover', function(d) {
        d3.select(this).attr('d', path).style('fill', 'black');
        // Show tooltip
        div.transition()
          .duration(200)
          .style('opacity', .9);
        div.html( '<span class="def">fall:</span> ' + d.properties.fall + '<br>' + 
                  '<span class="def">mass:</span> ' + d.properties.mass + '<br>' + 
                  '<span class="def">name:</span> ' + d.properties.name + '<br>' + 
                  '<span class="def">nametype:</span> ' + d.properties.nametype + '<br>' +
                  '<span class="def">recclass:</span> ' + d.properties.recclass + '<br>' + 
                  '<span class="def">reclat:</span> ' + d.properties.reclat + '<br>' + 
                  '<span class="def">year:</span> ' + d.properties.year + '<br>')
          .style('left', (d3.event.pageX+30) + 'px')
          .style('top', (d3.event.pageY/1.5) + 'px')
      })
      .on('mouseout', function(d) {
        // Reset color of dot
        d3.select(this).attr('d', path).style('fill', function(d) { return d.properties.hsl });

        // Fade out tooltip
        div.transition()
          .duration(500)
          .style('opacity', 0);
      });
  
  // Initialize map sizes
  sizeChange();
});

// Move and scale map and meteorites on interaction
function zoomed() {
  map.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
  meteorites.attr('transform', 'translate(' + d3.event.translate + ')scale(' + d3.event.scale + ')');
}


// Resize map on window resize
function sizeChange() {
  d3.selectAll("g").attr("transform", "scale(" + $("#map").width()/1900 + ")");
  $("svg").height($("#map").width()/2);
}
              
            
!
999px

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