Skip to content

Instantly share code, notes, and snippets.

@darrenjaworski

darrenjaworski/README.md

Last active March 10, 2021 09:17
Show Gist options
  • Star 1 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save darrenjaworski/5397202 to your computer and use it in GitHub Desktop.
Save darrenjaworski/5397202 to your computer and use it in GitHub Desktop.
Download ZIP
Choropleth with time slider - 2
Raw
README.md

A continuation of my original post. This time with student teacher ratio and an expanded timeline. I'm going to be upgrading this one to version 2.0 of a time slider with a map. Data courtesy of the Oklahoma Policy Institute.

Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.county-border {
fill: none;
stroke: white;
pointer-events: none;
}
.axis text {
font: 10px sans-serif;
}
.axis line, .axis path {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
</style>
<html>
<body>
<input id="slider" type="range" min="1987" max="2010" value="1987" step="1" />
<span id="range">1987</span>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script src="https://raw.github.com/fryn/html5slider/master/html5slider.js"></script>
<script type="text/javascript">
onload = function() {
var $ = function(id) { return document.getElementById(id); };
$('slider').oninput = function() { $('range').innerHTML = this.value; };
$('slider').oninput();
};
</script>
<script>
//choropleth
var width = 800, height = 400;
var value;
var color = d3.scale.linear().domain([7, 25]).range(["#F7FBFF", "#08306B"]);
var projection = d3.geo.conicConformal().parallels([35 + 34 / 60, 90 + 46 / 60]).rotate([98 + 00 / 60, -35 + 00 / 60]).translate([width / 2, height / 2]);
var path = d3.geo.path().projection(projection);
var svg = d3.select("body").append("svg").attr("width", width).attr("height", height);
d3.json("ok-countiesStudentRatio.json", function(error, ok) {
var counties = topojson.feature(ok, ok.objects.counties);
projection.scale(1).translate([0, 0]);
var b = path.bounds(counties), s = .95 / Math.max((b[1][0] - b[0][0]) / width, (b[1][1] - b[0][1]) / height), t = [(width - s * (b[1][0] + b[0][0])) / 2, (height - s * (b[1][1] + b[0][1])) / 2];
projection.scale(s).translate(t);
svg.selectAll("path").data(counties.features.filter(function(d) {
return d.id;
})).enter().append("path").attr("class", "county").attr("d", path).style("fill", function(d) {
return color(d.properties.eightyseven);
}).append("title").text(function(d) {
return d.properties.county + " County";
});
svg.append("path").datum(topojson.mesh(ok, ok.objects.counties, function(a, b) {
return a !== b;
})).attr("class", "county-border").attr("d", path);
d3.selectAll("input").on("change", function change() {
var value = this.value;
d3.selectAll("path").style("fill", function(d) {
switch (value) {
case "1987":
return color(d.properties.eightyseven);
break;
case "1988":
return color(d.properties.eightyeight);
break;
case "1989":
return color(d.properties.eightynine);
break;
case "1990":
return color(d.properties.ninety);
break;
case "1991":
return color(d.properties.ninetyone);
break;
case "1992":
return color(d.properties.ninetytwo);
break;
case "1993":
return color(d.properties.ninetythree);
break;
case "1994":
return color(d.properties.ninetyfour);
break;
case "1995":
return color(d.properties.ninetyfive);
break;
case "1996":
return color(d.properties.ninetysix);
break;
case "1997":
return color(d.properties.ninetyseven);
break;
case "1998":
return color(d.properties.ninetyeight);
break;
case "1999":
return color(d.properties.ninetynine);
break;
case "2000":
return color(d.properties.aught);
break;
case "2001":
return color(d.properties.one);
break;
case "2002":
return color(d.properties.two);
break;
case "2003":
return color(d.properties.three);
break;
case "2004":
return color(d.properties.four);
break;
case "2005":
return color(d.properties.five);
break;
case "2006":
return color(d.properties.six);
break;
case "2007":
return color(d.properties.seven);
break;
case "2008":
return color(d.properties.eight);
break;
case "2009":
return color(d.properties.nine);
break;
case "2010":
return color(d.properties.ten);
break;
}
});
});
});
//end choropleth
//key
var w = 140, h = 400;
var key = d3.select("body").append("svg").attr("id", "key").attr("width", w).attr("height", h);
var legend = key.append("defs").append("svg:linearGradient").attr("id", "gradient").attr("x1", "100%").attr("y1", "0%").attr("x2", "100%").attr("y2", "100%").attr("spreadMethod", "pad");
legend.append("stop").attr("offset", "0%").attr("stop-color", "#08306B").attr("stop-opacity", 1);
legend.append("stop").attr("offset", "100%").attr("stop-color", "#F7FBFF").attr("stop-opacity", 1);
key.append("rect").attr("width", w - 100).attr("height", h - 100).style("fill", "url(#gradient)").attr("transform", "translate(0,10)");
var y = d3.scale.linear().range([300, 0]).domain([7, 25]);
var yAxis = d3.svg.axis().scale(y).orient("right");
key.append("g").attr("class", "y axis").attr("transform", "translate(41,10)").call(yAxis).append("text").attr("transform", "rotate(-90)").attr("y", 30).attr("dy", ".71em").style("text-anchor", "end").text("Student teacher ratio");
//end key
d3.select(self.frameElement).style("height", height + "px");
</script>
</body>
</html>
Display the source blob
Display the rendered blob
Raw
ok-countiesStudentRatio.json
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment