This is a simple map example centered on the Pacific.
<!DOCTYPE html>
<meta charset="utf-8">
<style>
path {
stroke: white;
stroke-width: 0.25px;
fill: grey;
}
</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script>
<script src="//d3js.org/topojson.v0.min.js"></script>
<script>
var width = 960,
height = 500;
var projection = d3.geo.mercator()
.center([0, 5 ])
.scale(150)
.rotate([-180,0]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var path = d3.geo.path()
.projection(projection);
var g = svg.append("g");
// load and display the World
d3.json("world-110m2.json", function(error, topology) {
g.selectAll("path")
.data(topojson.object(topology, topology.objects.countries)
.geometries)
.enter()
.append("path")
.attr("d", path)
});
</script>
</body>
</html>