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@mbostock
Last active Feb 1, 2020
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New York Block Groups
license: gpl-3.0

13,837 census block groups; 13,866 polygons. 2.1M TopoJSON, 620K gzipped. Made by customizing the makefile in the U.S. Atlas project:

topojson \
	-o ny.json \
	--projection 'd3.geo.mercator().center([-75.819, 42.795]).scale(6193).translate([480, 350]).precision(0)' \
	-q 1e5 \
	-s .5 \
	-- blockgroups=shp/ny/blockgroups.shp
<!DOCTYPE html>
<meta charset="utf-8">
<style>
path {
fill: none;
stroke: #000;
stroke-width: .5px;
stroke-linejoin: round;
stroke-linecap: round;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 700;
var path = d3.geo.path()
.projection(null);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("ny.json", function(error, ny) {
if (error) throw error;
svg.append("path")
.datum(topojson.mesh(ny))
.attr("d", path);
});
d3.select(self.frameElement).style("height", height + "px");
</script>
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