Old school D3 from simpler times

All examples By author By category About

sabeehtaqi

Full window Github gist

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

<!DOCTYPE html>
<meta charset="utf-8">
<title>class 3 - states</title>
<style>
body {
  position: absolute;
  margin: 0px;
}
svg {
  background-color: none;
}
.info {
  font-family: sans-serif;
  color: blue;
  position: absolute;
  top: 450px;
  left: 800px;
  }
path.quake, circle.quake {
  fill: crimson;
  fill-opacity: 0.4;
}
path.state {
  fill: none;
  stroke: #000;
}  
path {
  fill: none;
  stroke: black;
}
</style>

<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/topojson.v2.min.js"></script>

<body>
<script>
var width = 960, height = 500;
var data;  // declare a global variable
var data2;

var info = d3.select("body").append("div")
    .attr("class", "info");
var projection = d3.geoAlbersUsa();
var path = d3.geoPath()
    .projection(projection);
// If you use this URL, you won't need your own copy of the data.
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);
  
var layer1 = svg.append("g");
var layer2 = svg.append("g");

var quakes = "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/2.5_day.geojson";
var url = "https://umbcvis.github.io/classes/class-03/us.json";
d3.json(url, plotStates);  
d3.json(quakes, plotQuakes); 
  
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
  
layer2.selectAll("path.state")
      .data(data)
    .enter()
      .append("path")
     .attr("class", "state")
      .attr("d", path)
  
}
 function plotQuakes(error, json) 
  {
  data2 = json;
    var features = data2.features;
  // Put your code here
  // Plot the features
  
    layer1.selectAll("path.quake")
      .data(features)
    .enter().append("path")
      .attr("class", "quake")
      .attr("d", path)
  }
  
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 3 - states</title>
<style>
body {
  position: absolute;
  margin: 0px;
}
svg {
  background-color: none;
}
.info {
  font-family: sans-serif;
  color: blue;
  position: absolute;
  top: 450px;
  left: 800px;
  }
path.quake, circle.quake {
  fill: crimson;
  fill-opacity: 0.4;
}
path.state {
  fill: none;
  stroke: #000;
}  
path {
  fill: none;
  stroke: black;
}
</style>

<script src="https://d3js.org/d3.v4.min.js"><\/script>
<script src="https://d3js.org/topojson.v2.min.js"><\/script>

<body>
<script>
var width = 960, height = 500;
var data;  // declare a global variable
var data2;

var info = d3.select("body").append("div")
    .attr("class", "info");
var projection = d3.geoAlbersUsa();
var path = d3.geoPath()
    .projection(projection);
// If you use this URL, you won't need your own copy of the data.
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);
  
var layer1 = svg.append("g");
var layer2 = svg.append("g");

var quakes = "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/2.5_day.geojson";
var url = "https://umbcvis.github.io/classes/class-03/us.json";
d3.json(url, plotStates);  
d3.json(quakes, plotQuakes); 
  
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
  
layer2.selectAll("path.state")
      .data(data)
    .enter()
      .append("path")
     .attr("class", "state")
      .attr("d", path)
  
}
 function plotQuakes(error, json) 
  {
  data2 = json;
    var features = data2.features;
  // Put your code here
  // Plot the features
  
    layer1.selectAll("path.quake")
      .data(features)
    .enter().append("path")
      .attr("class", "quake")
      .attr("d", path)
  }
  
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>

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