stephanebachelier/coins.json

## coins.json
[
  {
    "id": 62,
    "loc": [
      12.34,
      55.4
    ],
    "state": 2,
    "gender": 0,
    "coinType": "Lisbon",
    "visibilityArea": {
      "lat": 55.4,
      "lng": 13.340000000000014,
      "radius": 1.0000000000000002
    }
  },
  {
    "id": 48,
    "loc": [
      10.2,
      53.33
    ],
    "state": 2,
    "gender": 0,
    "coinType": "Lisbon",
    "visibilityArea": {
      "radius": 1.0000000000000002,
      "lng": 11.200000000000014,
      "lat": 53.33
    }
  },
  {
    "id": 36,
    "loc": [
      13.25,
      52.3
    ],
    "state": 2,
    "gender": 0,
    "coinType": "Lisbon",
    "visibilityArea": {
      "radius": 3.1999999999999966,
      "lng": 16.450000000000045,
      "lat": 52.3
    }
  }
]

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

svg {
  background: #eee;
}

.sphere {
  fill: #fff;
}

.land {
  fill: #000;
}

.boundary {
  fill: none;
  stroke: #fff;
  stroke-linejoin: round;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.overlay {
  fill: none;
  pointer-events: all;
}

</style>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<body>
<script>
// radius 2.5 is used for centered coin (user's coin)
function addCircleToElement (element, center, radius, style) {
  element.append('circle')
    .attr('cx', center.x)
    .attr('cy', center.y)
    .attr('r', radius)
    .attr('fill', style.fill)
    .attr('stroke', style.stroke)
    .attr('stroke-width', style.strokeWidth)
}

</script>

<script>

var coin = {
  id: 3,
  loc: [
    8.49,
    53.5
  ]
};

var width = 960,
    height = 960;

var projection = d3.geo.mercator()
    .translate([width / 2, height / 2])
    .scale((width - 1) / 2 / Math.PI);

var zoom = d3.behavior.zoom()
    .scaleExtent([1, 8])
    .on("zoom", zoomed);

var path = d3.geo.path()
    .projection(projection);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
  .append("g");

var g = svg.append("g");

svg.append("rect")
    .attr("class", "overlay")
    .attr("width", width)
    .attr("height", height);

svg
    .call(zoom)
    .call(zoom.event);

d3.json("/mbostock/raw/4090846/world-50m.json", function(error, world) {
  if (error) throw error;

  g.append("path")
      .datum({type: "Sphere"})
      .attr("class", "sphere")
      .attr("d", path);

  g.append("path")
      .datum(topojson.merge(world, world.objects.countries.geometries))
      .attr("class", "land")
      .attr("d", path);

  g.append("path")
      .datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
      .attr("class", "boundary")
      .attr("d", path);
});

d3.json("/stephanebachelier/raw/2dd298230d83a07027358e3dada75c49/coins.json", function(error, coins) {
  if (error) throw error;
  // coins should be appened as circle

  // append `coin` to map and center the map on it. This is the coin owned by
  // append coins to map
})

function zoomed() {
  g.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}

d3.select(self.frameElement).style("height", height + "px");

</script>
	[
	{
	"id": 62,
	"loc": [
	12.34,
	55.4
	],
	"state": 2,
	"gender": 0,
	"coinType": "Lisbon",
	"visibilityArea": {
	"lat": 55.4,
	"lng": 13.340000000000014,
	"radius": 1.0000000000000002
	}
	},
	{
	"id": 48,
	"loc": [
	10.2,
	53.33
	],
	"state": 2,
	"gender": 0,
	"coinType": "Lisbon",
	"visibilityArea": {
	"radius": 1.0000000000000002,
	"lng": 11.200000000000014,
	"lat": 53.33
	}
	},
	{
	"id": 36,
	"loc": [
	13.25,
	52.3
	],
	"state": 2,
	"gender": 0,
	"coinType": "Lisbon",
	"visibilityArea": {
	"radius": 3.1999999999999966,
	"lng": 16.450000000000045,
	"lat": 52.3
	}
	}
	]
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	svg {
	background: #eee;
	}

	.sphere {
	fill: #fff;
	}

	.land {
	fill: #000;
	}

	.boundary {
	fill: none;
	stroke: #fff;
	stroke-linejoin: round;
	stroke-linecap: round;
	vector-effect: non-scaling-stroke;
	}

	.overlay {
	fill: none;
	pointer-events: all;
	}

	</style>
	<script src="//d3js.org/d3.v3.min.js"></script>
	<script src="//d3js.org/topojson.v1.min.js"></script>
	<body>
	<script>
	// radius 2.5 is used for centered coin (user's coin)
	function addCircleToElement (element, center, radius, style) {
	element.append('circle')
	.attr('cx', center.x)
	.attr('cy', center.y)
	.attr('r', radius)
	.attr('fill', style.fill)
	.attr('stroke', style.stroke)
	.attr('stroke-width', style.strokeWidth)
	}

	</script>

	<script>

	var coin = {
	id: 3,
	loc: [
	8.49,
	53.5
	]
	};

	var width = 960,
	height = 960;

	var projection = d3.geo.mercator()
	.translate([width / 2, height / 2])
	.scale((width - 1) / 2 / Math.PI);

	var zoom = d3.behavior.zoom()
	.scaleExtent([1, 8])
	.on("zoom", zoomed);

	var path = d3.geo.path()
	.projection(projection);

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height)
	.append("g");

	var g = svg.append("g");

	svg.append("rect")
	.attr("class", "overlay")
	.attr("width", width)
	.attr("height", height);

	svg
	.call(zoom)
	.call(zoom.event);

	d3.json("/mbostock/raw/4090846/world-50m.json", function(error, world) {
	if (error) throw error;

	g.append("path")
	.datum({type: "Sphere"})
	.attr("class", "sphere")
	.attr("d", path);

	g.append("path")
	.datum(topojson.merge(world, world.objects.countries.geometries))
	.attr("class", "land")
	.attr("d", path);

	g.append("path")
	.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
	.attr("class", "boundary")
	.attr("d", path);
	});

	d3.json("/stephanebachelier/raw/2dd298230d83a07027358e3dada75c49/coins.json", function(error, coins) {
	if (error) throw error;
	// coins should be appened as circle

	// append `coin` to map and center the map on it. This is the coin owned by
	// append coins to map
	})

	function zoomed() {
	g.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
	}

	d3.select(self.frameElement).style("height", height + "px");

	</script>