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March 10, 2017 00:15
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license: mit |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<title>class 3 - states</title> | |
<style> | |
body { | |
position: absolute; | |
margin: 0px; | |
} | |
svg { | |
background-color: lightgreen; | |
} | |
.info { | |
font-family:'Helvetica Neue', Helvetica, Arial, sans-serif; | |
color: red; | |
position: absolute; | |
top: 450px; | |
left: 800px; | |
} | |
path { | |
fill: grey; | |
stroke:#555555 ; | |
} | |
</style> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script src="https://d3js.org/topojson.v2.min.js"></script> | |
<script src="d3.legend.js"></script> | |
<body> | |
<script> | |
var width = 960, height = 500; | |
var data; | |
var colors = d3.scaleOrdinal() | |
.domain( ["A", "B", "C", "D"] ) | |
.range(["#fe9929", "#ec7014", "#cc4c02", "#8c2d04"]); | |
var legend = d3.legend() | |
.translate([ width / 4 , height / 4 ]) | |
.colors(colors) | |
.cb(function() { console.log("Done!"); }); | |
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'); | |
layer2.call(legend); | |
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 url = "https://umbcvis.github.io/classes/class-03/us.json" | |
var usgs = "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_week.geojson"; | |
d3.json(url, plotStates); | |
d3.json(usgs, plotQuakes); | |
function plotQuakes(error, data) { | |
if (error) console.log(error); | |
console.log(data); | |
//Quakes | |
var point = layer2.selectAll("path.quake") | |
.data(data.features) | |
.enter(); | |
var areas = point.append("path") | |
.attr("d", path) | |
.attr("class", "quake"); | |
//labels | |
point.append("text") | |
.attr("x", function (d) { return path.centroid(d)[0]; }) | |
.attr("y", function (d) { return path.centroid(d)[1]; }) | |
.text (function (d) { return d.properties.mag; }); | |
} | |
function plotStates(error, json) | |
{ | |
data = json.objects.us.geometries.map(function(d) { return topojson.feature(json, d); }) | |
layer.selectAll("path") | |
.data(data) | |
.enter() | |
.append("path") | |
.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"); | |
} | |
</script> |
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