class 3 - states // source http://jsbin.com/ginefe

<!DOCTYPE html>
<meta charset="utf-8">
<title>class 5 - states</title>
<style>
body {
  position: absolute;
  margin: 0px;
}
svg {
  background-color: #4682b4;
}
.info {
  font-family: sans-serif;
  color: #000;
  position: absolute;
  top: 450px;
  left: 800px;
}
path {
  fill: #555555;
  stroke: #aaaaaa;
}
</style>

<body>
    // Global variable for state data
var state_data;

// Global variable for USGS data
var usgs_data;
  
<script>
var width = 960, height = 500, padding = 38;
var oColorScaleDefn=["1-2",
				"2-3","3-4%","4 and up"];

var data;  // declare a global variable
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
    .on("mousemove", mousemoved);
var layer = svg.append('g');
var layer2 = svg.append('g');
var info = d3.select("body").append("div")
    .attr("class", "info");
var projection = d3.geoAlbersUsa();
var path = d3.geoPath()
    .projection(projection);
  
var pathQuake = d3.geoPath()
    .pointRadius(5)
    .projection(projection);
var usgs = "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_week.geojson";
  d3.json(usgs, plotQuakes);  
  function plotQuakes(error, data) {
  if (error) console.log(error);
  
  // Filter the small earthquakes
  var features = data.features;
  // Plot the earthquakes
  layer2.selectAll("path.quake")
      .data(features)
    .enter().append("path")
      .attr("class", "quake")
  .style('fill','crimson')
      .attr("d", path)
}
  
// If you use this URL, you won't need your own copy of the data.
var url = "https://umbcvis.github.io/classes/class-03/us.json"

d3.json(url, plotStates);
function plotStates(error, json) {
  // Create array of GeoJSON features -- this defines the global variable "data"
  data = json.objects.us.geometries.map(function(d) { return topojson.feature(json, d); })
  // Put your code here
  // Plot the features
  
  layer.selectAll("path")
      .data(data)
    .enter()
      .append("path")
      .attr("d", path);
  
  /*Add Legend*/
  
  state_data = json.objects.us.geometries.map(
    function(d) { 
      return topojson.feature(json, d);
    })
  
  function plotQuakes(error, json) {
  
    // Assign the json to a global variable "usgs_data"
    usgs_data = json;
    
    // Filter the features by magnitude
    var features1 = usgs_data.features.filter(function(d) {
      return (d.properties.mag >= 1.0) && (d.properties.mag < 2.0)
    });
    
    var features2 = usgs_data.features.filter(function(d) {
      return (d.properties.mag >= 2.0) && (d.properties.mag < 3.0)
    });
  
    var features3 = usgs_data.features.filter(function(d) {
      return (d.properties.mag >= 3.0) && (d.properties.mag < 4.0)
    });
    
    var features4 = usgs_data.features.filter(function(d) {
      return (d.properties.mag >= 4.0)
    });
  }

var ordinal = d3.scaleOrdinal()
  .domain(["1.0 - 2.0", "2.0 - 3.0", "3.0 - 4.0", "4.0 +"])
  .range([ "rgb(50, 205, 50)", "rgb(255, 255, 0)", "rgb(255, 140, 0)", "rgb(255, 0, 0)"]);

var svg2 = d3.select("svg").append("svg")
  .attr("x", 825)
  .attr("y", 450);

}

function mousemoved() {
  info.text(formatLocation(projection.invert(d3.mouse(this)), projection.scale()));
}
function formatLocation(p, k) {
  var format = d3.format("." + Math.floor(Math.log(k) / 2 - 2) + "f");
  return (p[1] < 0 ? format(-p[1]) + "°S" : format(p[1]) + "°N") + " "
       + (p[0] < 0 ? format(-p[0]) + "°W" : format(p[0]) + "°E");
}

</script>
<script id="jsbin-source-html" type="text/html">
<!DOCTYPE html>
<meta charset="utf-8">
<title>class 5 - states</title>
<style>
body {
  position: absolute;
  margin: 0px;
}
svg {
  background-color: #4682b4;
}
.info {
  font-family: sans-serif;
  color: #000;
  position: absolute;
  top: 450px;
  left: 800px;
}
path {
  fill: #555555;
  stroke: #aaaaaa;
}
</style>

<body>
    // Global variable for state data
var state_data;

// Global variable for USGS data
var usgs_data;
  
<script>
var width = 960, height = 500, padding = 38;
var oColorScaleDefn=["1-2",
				"2-3","3-4%","4 and up"];

var ordinal = d3.scaleOrdinal()
  .domain(["1.0 - 2.0", "2.0 - 3.0", "3.0 - 4.0", "4.0 +"])
  .range([ "rgb(50, 205, 50)", "rgb(255, 255, 0)", "rgb(255, 140, 0)", "rgb(255, 0, 0)"]);

var svg2 = d3.select("svg").append("svg")
  .attr("x", 825)
  .attr("y", 450);

}

<\/script>

</script>

https://d3js.org/d3.v4.min.js

https://d3js.org/topojson.v2.min.js

https://d3js.org/d3.v4.min.js

https://d3js.org/topojson.v2.min.js