D3 Examples - AC100 vs WS 100 - Elevation Profile

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
body {
  font: 10px sans-serif;
}
​
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
​
.x.axis path {
  display: none;
}
​
.area.above {
  fill: rgb(145,207,96);
}
​
.area.below {
  fill: rgb(252,141,89);
}
​
.legendSizeLine line {
    stroke: rgb(145,207,96);
   }
​
.line {
  fill: none;
  stroke: #000;
  stroke-width: 1.5px;
}
​
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/1.6.0/d3-legend.min.js""></script>
<script>
​
var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
​
var x = d3.scale.linear()
    .range([0, width]);
​
var y = d3.scale.linear()
    .range([height, 0]);
​
var xAxis = d3.svg.axis()
    .scale(x)
//    .orient("bottom");
​
var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left");
​
var line = d3.svg.area()
    .interpolate("linear")
    .x(function(d) { return x(d.mile); })
    .y(function(d) { return y(d["WS100"]); });
​
var area = d3.svg.area()
    .interpolate("linear")
    .x(function(d) { return x(d.mile); })
    .y1(function(d) { return y(d["WS100"]); });
​
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
//https://d3-legend.susielu.com/
var linear = d3.scale.linear()
  .domain([0,10])
  .range(["rgb(252,141,89)", "rgb(145,207,96)"]);
​
//var svg = d3.select("svg");
​
svg.append("g")
  .attr("class", "legendLinear")
  .attr("transform", "translate(20,400)");
​
var legendLinear = d3.legend.color()
  .shapeWidth(100)
 // .cells([1, 2]
  .cells(2)
  .orient('horizontal')
  .labels(["WS100 higher el.", "AC100 higher el."])
  .scale(linear);
​
svg.select(".legendLinear")
  .call(legendLinear);
​
d3.tsv("data.tsv", function(error, data) {
  if (error) throw error;
​
  data.forEach(function(d) {
    d["mile"]= +d["mile"];
    d["WS100"]= +d["WS100"];
    d["AC100"] = +d["AC100"];
  });
​
  x.domain(d3.extent(data, function(d) { return d.mile; }));
​
  y.domain([
    d3.min(data, function(d) { return Math.min(d["WS100"], d["AC100"]); }),
    d3.max(data, function(d) { return Math.max(d["WS100"], d["AC100"]); })
  ]);
​
  svg.datum(data);
​
  svg.append("clipPath")
      .attr("id", "clip-below")
    .append("path")
      .attr("d", area.y0(height));
​
  svg.append("clipPath")
      .attr("id", "clip-above")
    .append("path")
      .attr("d", area.y0(0));
​
  svg.append("path")
      .attr("class", "area above")
      .attr("clip-path", "url(#clip-above)")
      .attr("d", area.y0(function(d) { return y(d["AC100"]); }));
​
  svg.append("path")
      .attr("class", "area below")
      .attr("clip-path", "url(#clip-below)")
      .attr("d", area);
​
  svg.append("path")
      .attr("class", "line")
      .attr("d", line);
​
  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", "-4.75em")
      .style("text-anchor", "end")
      .text("Elevation (feet)");
​
      svg.append("g")
      .attr("class", "xaxis")
      .call(xAxis)
    .append("text")
      .attr("transform", "rotate(0)")
      .attr("x", 880)
      .attr("dx", ".95em")
      .style("text-anchor", "end")
      .text("Distance (miles)");
​
});
​
</script>
<div>Source of elevation data: <a href="https://catalog.data.gov/dataset/national-elevation-dataset-ned-1-3-arc-second-downloadable-data-collection-national-geospatial">USGS National Map (1/3 arc-second DEMs)</a></div>
​
    