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Last active Aug 10, 2017
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winding problem
license: mit
<!DOCTYPE html>
<meta charset="utf-8">
<script src=""></script>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
var width = 960,
height = 500;
var svg ='body')
.attr('width', width)
.attr('height', height);
d3.json('istanbul.geojson', function(error,json) {
var projection = d3.geoMercator();
var path = d3.geoPath().projection(projection)
json.features.forEach(item => {
if (d3.geoArea(item)> 2 * Math.PI) {
item.geometry.coordinates = => => e.reverse())); = true;
projection.fitExtent([[0,0],[width,height]], json);
.style("fill", d => ? "yellow" : "lightblue")
.style('opacity', '0.1')
.attr("d", path)
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