Created
January 17, 2013 01:41
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albers example from d3.js
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"> | |
<title>Albers Projection</title> | |
<script type="text/javascript" src="../../d3.v2.js"></script> | |
<script type="text/javascript" src="../../lib/jquery/jquery.min.js"></script> | |
<script type="text/javascript" src="../../lib/jquery-ui/jquery-ui.min.js"></script> | |
<style type="text/css"> | |
@import url("../../lib/jquery-ui/jquery-ui.css"); | |
body, .ui-widget { | |
font: 14px Helvetica Neue; | |
} | |
svg { | |
width: 960px; | |
height: 500px; | |
border: solid 1px #ccc; | |
background: #eee; | |
} | |
#states path { | |
fill: #ccc; | |
stroke: #fff; | |
} | |
#states circle { | |
fill: #fcc; | |
stroke: #000; | |
} | |
div { | |
width: 960px; | |
} | |
</style> | |
</head> | |
<body> | |
<h3>Albers Projection</h3> | |
<script type="text/javascript"> | |
// Our projection. | |
var xy = d3.geo.albers(), | |
path = d3.geo.path().projection(xy); | |
d3.select("body") | |
.append("svg") | |
.append("g") | |
.attr("id", "states"); | |
d3.json("../data/us-states.json", function(collection) { | |
d3.select("#states") | |
.selectAll("path") | |
.data(collection.features) | |
.enter().append("path") | |
.attr("d", path); | |
d3.select("#states") | |
.append("circle") | |
.attr("r", 10) | |
.attr("transform", "translate(" + xy(xy.origin()).join(",") + ")") | |
}); | |
function refresh() { | |
d3.selectAll("#states path") | |
.attr("d", path); | |
d3.select("#states circle") | |
.attr("transform", "translate(" + xy(xy.origin()).join(",") + ")") | |
d3.select("#parallels span") | |
.text(xy.parallels()); | |
d3.select("#lon span") | |
.text(xy.origin()[0]); | |
d3.select("#lat span") | |
.text(xy.origin()[1]); | |
d3.select("#scale span") | |
.text(xy.scale()); | |
d3.select("#translate-x span") | |
.text(xy.translate()[0]); | |
d3.select("#translate-y span") | |
.text(xy.translate()[1]); | |
} | |
</script><p> | |
<div id="lon">origin.longitude: <span>-98</span></div> | |
<div id="lat">origin.latitude: <span>38</span></div><p> | |
<div id="parallels">parallels: <span>29.5,45.5</span></div><p> | |
<div id="scale">scale: <span>1000</span></div><p> | |
<div id="translate-x">translate.x: <span>480</span></div> | |
<div id="translate-y">translate.y: <span>250</span></div> | |
<script type="text/javascript"> | |
$("#parallels").slider({ | |
range: true, | |
min: -90, | |
max: 90, | |
step: 1e-1, | |
values: [29.5, 45.5], | |
slide: function(event, ui) { | |
xy.parallels(ui.values); | |
refresh(); | |
} | |
}); | |
$("#lon").slider({ | |
min: -180, | |
max: 180, | |
step: 1e-1, | |
value: -98, | |
slide: function(event, ui) { | |
var origin = xy.origin(); | |
origin[0] = ui.value; | |
xy.origin(origin); | |
refresh(); | |
} | |
}); | |
$("#lat").slider({ | |
min: -90, | |
max: 90, | |
step: 1e-1, | |
value: 38, | |
slide: function(event, ui) { | |
var origin = xy.origin(); | |
origin[1] = ui.value; | |
xy.origin(origin); | |
refresh(); | |
} | |
}); | |
$("#scale").slider({ | |
min: 0, | |
max: 3000, | |
value: 1000, | |
slide: function(event, ui) { | |
xy.scale(ui.value); | |
refresh(); | |
} | |
}); | |
$("#translate-x").slider({ | |
min: -2000, | |
max: 2000, | |
value: 480, | |
slide: function(event, ui) { | |
var translate = xy.translate(); | |
translate[0] = ui.value; | |
xy.translate(translate); | |
refresh(); | |
} | |
}); | |
$("#translate-y").slider({ | |
min: -2000, | |
max: 2000, | |
value: 250, | |
slide: function(event, ui) { | |
var translate = xy.translate(); | |
translate[1] = ui.value; | |
xy.translate(translate); | |
refresh(); | |
} | |
}); | |
</script> | |
</body> | |
</html> |
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