Skip to content

Instantly share code, notes, and snippets.

@git-ashish
Last active December 20, 2015 21:08
Show Gist options
  • Save git-ashish/6194859 to your computer and use it in GitHub Desktop.
Save git-ashish/6194859 to your computer and use it in GitHub Desktop.
Scaling and Panning - d3.js colored world map using topojson
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.graticule {
fill: none;
stroke: #777;
stroke-opacity: .5;
stroke-width: .5px;
}
.land, .country {
fill: #222;
fill: #d3d3d3;
}
.boundary {
fill: none;
stroke: #222;
stroke: #fff;
stroke-width: .5px;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>
<!--
var w=window,d=document,e=d.documentElement,g=d.getElementsByTagName('body')[0],x=w.innerWidth||e.clientWidth||g.clientWidth,y=w.innerHeight||e.clientHeight||g.clientHeight;
//-->
var width = x-100,
height = y-100;
var projection = d3.geo.mercator()
.scale((width + 1) / 2 / Math.PI)
.translate([width / 2, height / 2])
.precision(.1);
var path = d3.geo.path()
.projection(projection);
var graticule = d3.geo.graticule();
var svg = d3.select("body").append("svg")
.attr("id", "baseSvg")
.attr("width", width)
.attr("height", height);
var zoom = d3.behavior.zoom()
//.translate([margin.left, margin.top])
.scale(1)
.on("zoom", zoomed);
svg.call(zoom);
var scale0 = [1,1];
function zoomed(){
console.log(d3.event.translate[0] + ' | ' + d3.event.translate[0]/scale0[0]);
scale0 = d3.event.translate;
//console.log(d3.select("#viz-wrapper"));
d3.select("#viz-wrapper").attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}
//svg.append("path")
var viz = svg.append("g")
.attr("id","viz-wrapper");
/*
.append("path")
.datum(graticule)
.attr("class", "graticule")
.attr("d", path);
*/
var color = d3.scale.category20();
/*
d3.json("world-50m.json", function(error, world) {
console.log(world);
viz.insert("path", ".graticule")
.datum(topojson.feature(world, world.objects.land))
.attr("class", "land")
.attr("d", path);
viz.insert("path", ".graticule")
.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
.attr("class", "boundary")
.attr("d", path);
});
*/
d3.json("world-50m.json", function(error, world) {
var countries = topojson.feature(world, world.objects.countries).features,
neighbors = topojson.neighbors(world.objects.countries.geometries);
viz.selectAll(".country")
.data(countries)
.enter().insert("path", ".graticule")
//.attr("class", "country")
.attr("class", function(d){ return "country "+d.id })
.attr("d", path)
//.style("fill", function(d, i) { return color(d.color = d3.max(neighbors[i], function(n) { return countries[n].color; }) + 1 | 0); });
.style("fill", function(d,i){ return color(Math.random()*20); })
/*
viz.insert("path", ".graticule")
.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
.attr("class", "boundary")
.attr("d", path);
*/
});
d3.select(self.frameElement).style("height", height + "px");
</script>
Display the source blob
Display the rendered blob
Raw
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment