D3 Examples - NV_Earthquake

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<!DOCTYPE html>
<meta charset="utf-8">
<title>Map of Earthquakes in the past week</title>
​
<div id="sliderContainer">
    <input id="timeslide" type="range" min="0" max="11" value="0" step="1"/><br>
    <span id="range">Monday</span>
</div>
​
<style>
body {
  position: absolute;
  margin: 10px;
  }
svg {
  background-color: #45b3b3;
}
.info {
  font-family: sans-serif;
  color: #0f0f0f;
  position: absolute;
  top: 450px;
  left: 800px;
}
path {
  fill: #595959;
  stroke: #bfbfbf;
  position: absolute;
  
}
body {
    position: absolute;
    font-family: "Proxima Nova", "Montserrat", sans-serif;
}
h1, h2 {
    position: absolute;
    left: 10px;
    font-size: 1.3em;
    font-weight: 100;
}
h2 {
    top: 30px;
    font-size: 1em;
}
.hover {
    fill: yellow;   
}
#sliderContainer {
    text-align: center;
    position: relative;
    top: 600px;
}
</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 = 1200, height = 700;
var data;  // declare a global variable
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
    .on("mousemove", mousemoved);
  
 // Append g element to the SVG
// "g" will contain geometry elements
var layer = svg.append('g');
var layer2 = svg.append('g');
var info = d3.select("body").append("div")
    .attr("class", "info");
  
// Set Projection Parameters
var projection = d3.geoAlbersUsa();
var path = d3.geoPath()
    .projection(projection);
​
 // Create GeoPath function that uses built-in D3 functionality to turn
// lat/lon coordinates into screen coordinates
var pathQuake = d3.geoPath()
    .pointRadius(5)
    .projection(projection);
  
// If you use this URL, you won't need your own copy of the data.
//Loads the map dataset
var url = "https://umbcvis.github.io/classes/class-03/us.json";
  
//Loads the earthquake dataset
var usgs = "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_week.geojson";
​
// Classic D3... Select non-existent elements, bind the data, append the elements, and apply attributes
  
d3.json(usgs, plotQuakes)
d3.json(url, plotStates);
 
  function plotQuakes(error, data) {
  if (error) console.log(error);
    
 // Define the data earthquakes
var features = data.features;
    
var inputValue = null;
var days = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"];
    
 // Plot the earthquakes
  layer2.selectAll("path.quake")//path
      .data(features)//rodents_json.features
        .enter().append("path")//"path"
        .attr("fill", initialDate)
      .attr("class", "quake")
      .style('fill', 'crimson')
        .attr( "stroke", "blue" )
      .attr("d", path)// "d", geoPath
        .attr( "class", "incident")
        
}
  
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);
}
​
// when the input range changes update the value 
d3.select("#timeslide").on("input", function() {
    update(+this.value);
});
  
​
​
// update the fill of each SVG of class "incident" with value
function update(value) {
    document.getElementById("range").innerHTML=days[value];
    inputValue = days[value];
    d3.selectAll(".incident")
        .attr("fill", dateMatch);
} 
​
function dateMatch(data, value) {
var d = new Date(data.properties.OPEN_DT);
var days = days[d.getDay()];
    if (inputValue == days) {
        this.parentElement.appendChild(this);
        return "red";
    } else {
        return "#999";
    };
}
  
function initialDate(d,i){
    var d = new Date(d.properties.OPEN_DT);
    var dy = d[d.getDay()];
    if (dy == "Monday") {
        this.parentElement.appendChild(this);
        return "red";
    } else {
        return "#999";
    };
}
​
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");
}
​
//Title of Map
svg.append('text')
   .attr('y', '92')
  .style('font-size', '2em')
   .text('Map of Earthquake in the US')
</script>
    