Created
March 31, 2017 00:55
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homework 7
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
#streets { | |
fill: none; | |
stroke: black; | |
stroke-width: 1.5px; | |
stroke-linejoin: round; | |
} | |
</style> | |
<svg width="960" height="500"></svg> | |
<script src="//d3js.org/d3.v4.min.js"></script> | |
<script src="//d3js.org/d3-tile.v0.0.min.js"></script> | |
<script src="//d3js.org/topojson.v1.min.js"></script> | |
<script> | |
var pi = Math.PI, | |
tau = 2 * pi; | |
var svg = d3.select("svg"), | |
width = +svg.attr("width"), | |
height = +svg.attr("height"); | |
var projection = d3.geoMercator() | |
.scale((1 << 18) / tau) | |
.translate([width / 2, height / 2]) | |
.center([-83.15, 42.43]); | |
var path = d3.geoPath() | |
.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.queue() | |
.defer(d3.json, url) | |
.defer(d3.json, usgs) | |
.await(ready) | |
function ready(error, us, json) { | |
if (error) throw error; | |
var states = us.objects.us.geometries.map(function(d) { return topojson.feature(us, d); }) | |
var ok = states.filter(function(d) {return d.properties.name === "Oklahoma"; }); | |
console.log('here i am', states.length, ok.length); | |
var extent = [[0,0], [width, height]]; | |
projection.fitExtent(extent, ok[0]); | |
var tiles = d3.tile() | |
.size([width, height]) | |
.scale(projection.scale() * tau) | |
.translate(projection([0, 0])) | |
(); | |
svg.selectAll("image") | |
.data(tiles) | |
.enter().append("image") | |
.attr("xlink:href", function(d) { return "http://" + "abc"[d[1] % 3] + ".tile.openstreetmap.org/" + d[2] + "/" + d[0] + "/" + d[1] + ".png"; }) | |
.attr("x", function(d) { return (d[0] + tiles.translate[0]) * tiles.scale; }) | |
.attr("y", function(d) { return (d[1] + tiles.translate[1]) * tiles.scale; }) | |
.attr("width", tiles.scale) | |
.attr("height", tiles.scale); | |
svg.append("path") | |
.attr("id", "streets") | |
.datum(topojson.mesh(us, us.objects.us)) | |
.attr("d", path); | |
console.log('here i am before', json.features.length) | |
var quakes = json.features.filter(function(d){return d3.geoContains(ok[0], d.geometry.coordinates)}) | |
console.log('here i am after', quakes.length) | |
svg.selectAll("path.quake") | |
.data(quakes) | |
.enter().append("path") | |
.attr("class", "quake") | |
.style("fill", "crimson") | |
.attr("d", path) | |
} | |
</script> |
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