Created
February 11, 2015 20:03
-
-
Save vlandham/db0b55dab7322eed173a to your computer and use it in GitHub Desktop.
display geojson with d3
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
$ -> | |
width = 900 | |
height = 900 | |
projection = d3.geo.albersUsa().scale(1).translate([0,0]) | |
path = d3.geo.path().projection(projection) | |
vis = d3.select("#vis") | |
.append("svg") | |
.attr("width", width) | |
.attr("height", height) | |
d3.json "data/kc_tracts.json", (json) -> | |
# code to automatically figure out projection scale and translation | |
# from: http://bl.ocks.org/mbostock/4707858 | |
bounds = path.bounds(json) | |
s = .95 / Math.max((bounds[1][0] - bounds[0][0]) / width, (bounds[1][1] - bounds[0][1]) / height) | |
t = [(width - s * (bounds[1][0] + bounds[0][0])) / 2, (height - s * (bounds[1][1] + bounds[0][1])) / 2] | |
projection | |
.scale(s) | |
.translate(t) | |
vis.append("g") | |
.attr("class", "tracts") | |
.selectAll("path") | |
.data(json.features) | |
.enter().append("path") | |
.attr("d", path) | |
.attr("fill-opacity", 0.5) | |
.attr("fill", (d) -> if d.properties["STATEFP10"] == "20" then "#B5D9B9" else "#85C3C0") | |
.attr("stroke", "#222") |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment