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December 17, 2015 00:05
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FinalExam_pt1
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.land { | |
fill: #222; | |
} | |
.county-boundary { | |
fill: none; | |
stroke: #fff; | |
stroke-width: .5px; | |
} | |
.state-boundary { | |
fill: none; | |
stroke: #fff; | |
} | |
circle { | |
fill: red; | |
} | |
</style> | |
<body> | |
<script src="https://d3js.org/d3.v3.min.js"></script> | |
<script src="https://d3js.org/topojson.v1.min.js"></script> | |
<script> | |
var width = 960, | |
height = 500; | |
var projection = d3.geo.albersUsa() | |
.scale(1000) | |
.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); | |
var places = [ | |
{ | |
name: "Washington, DC", | |
location: { | |
latitude: 38.8951100, | |
longitude: -77.0363700 | |
} | |
}]; | |
d3.json("https://gist.githubusercontent.com/mbostock/4090846/raw/us.json", function(error, us) { | |
if (error) throw error; | |
svg.insert("path", ".graticule") | |
.datum(topojson.feature(us, us.objects.land)) | |
.attr("class", "land") | |
.attr("d", path); | |
svg.insert("path", ".graticule") | |
.datum(topojson.mesh(us, us.objects.counties, function(a, b) { return a !== b && !(a.id / 1000 ^ b.id / 1000); })) | |
.attr("class", "county-boundary") | |
.attr("d", path); | |
svg.insert("path", ".graticule") | |
.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; })) | |
.attr("class", "state-boundary") | |
.attr("d", path); | |
svg.selectAll(".pin") | |
.data(places) | |
.enter().append("circle", ".pin") | |
.attr("r", 5) | |
.attr("transform", function(d) { | |
return "translate("+projection([d.location.longitude,d.location.latitude])+")"; | |
}); | |
}); | |
d3.select(self.frameElement).style("height", height + "px"); | |
</script> |
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