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April 19, 2015 14:54
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Module 2: Dollar Values of Urban Forest in Four Cities
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CITY | TREESperhectare | NET_CARBON_SEQUESTRATION | LEAF_AREA | TREE_VALUE | |
---|---|---|---|---|---|
CHICAGO | 149.2 | 410.19 | 10917.34 | 48570 | |
PHILADELPHIA | 61.81 | 313.16 | 8281.563 | 51277 | |
MINNEAPOLIS | 64.81 | 275.15 | 6432.62 | 35486 | |
KANSAS CITY | 117.31 | 545.78 | 12219.971 | 51377 |
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="utf-8"> | |
<title>Comparison of the Dollar Values of Trees in Four U.S. Cities</title> | |
<script type="text/javascript" src="http://d3js.org/d3.v3.js"></script> | |
<style type="text/css"> | |
body { | |
background-color: #ddddff; | |
} | |
svg { | |
background-color: white; | |
} | |
</style> | |
</head> | |
<body> | |
<script type="text/javascript"> | |
var svg = d3.select("body") | |
.append("svg") | |
.attr("width", 600) | |
.attr("height", 134); | |
d3.csv("DataVis_TreeCensus_FourCities.csv", function(data) { | |
data.sort(function(a, b) { | |
return d3.descending(+a.TREE_VALUE, +b.TREE_VALUE); | |
//If your numeric values aren't sorting properly, | |
//try commenting out the line above, and instead using: | |
// | |
//return d3.descending(+a.lifeSatisfaction, +b.lifeSatisfaction); | |
// | |
//Data coming in from the CSV is saved as strings (text), | |
//so the + signs here force JavaScript to treat those | |
//strings instead as numeric values, thereby fixing the | |
//sort order (hopefully!). | |
}); | |
var rects = svg.selectAll("rect") | |
.data(data) | |
.enter() | |
.append("rect"); | |
rects.attr("x", 0) | |
.attr("y", function(d, i) { | |
return (i * 30)+ 10; | |
}) | |
.attr("width", function(d) { | |
return d.TREE_VALUE / 100; | |
}) | |
.attr("height", 24) | |
.append("title") | |
.text(function(d) { | |
return d.CITY + "'s trees are worth US$ " + d.TREE_VALUE + " per hectare"; | |
}); | |
}); | |
</script> | |
</body> | |
</html> |
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