d3noob/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    This small example was made to answer a quesition on the d3noob.org blog about how to add the names of the cities beside the dots.

  
## cities.csv

          
            code
            city
            country
            lat
            lon

            
              ZNZ
              ZANZIBAR
              TANZANIA
              -6.13
              39.31

            
              TYO
              TOKYO
              JAPAN
              35.68
              139.76

            
              AKL
              AUCKLAND
              NEW ZEALAND
              -36.85
              174.78

            
              BKK
              BANGKOK
              THAILAND
              13.75
              100.48

            
              DEL
              DELHI
              INDIA
              29.01
              77.38

            
              SIN
              SINGAPORE
              SINGAPOR
              1.36
              103.75

            
              BSB
              BRASILIA
              BRAZIL
              -15.67
              -47.43

            
              RIO
              RIO DE JANEIRO
              BRAZIL
              -22.90
              -43.24

            
              YTO
              TORONTO
              CANADA
              43.64
              -79.40

            
              IPC
              EASTER ISLAND
              CHILE
              -27.11
              -109.36

            
              SEA
              SEATTLE
              USA
              47.61
              -122.33

## index.html
<!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="http://d3js.org/topojson.v0.min.js"></script>
<script>
var width = 960,
    height = 500;

var projection = d3.geo.mercator()
    .center([0, 5 ])
    .scale(200)
    .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) {

// load and display the cities
d3.csv("cities.csv", function(error, data) {
    g.selectAll("circle")
       .data(data)
       .enter()
     .append("a")
				  .attr("xlink:href", function(d) {
					  return "https://www.google.com/search?q="+d.city;}
				  )
     .append("circle")
       .attr("cx", function(d) {
               return projection([d.lon, d.lat])[0];
       })
       .attr("cy", function(d) {
               return projection([d.lon, d.lat])[1];
       })
       .attr("r", 5)
       .style("fill", "red");

    g.selectAll("text")
       .data(data)
       .enter()
     .append("text") // append text
       .attr("x", function(d) {
               return projection([d.lon, d.lat])[0];
       })
       .attr("y", function(d) {
               return projection([d.lon, d.lat])[1];
       })
       .attr("dy", -7) // set y position of bottom of text
      .style("fill", "black") // fill the text with the colour black
      .attr("text-anchor", "middle") // set anchor y justification
      .text(function(d) {return d.city;}); // define the text to display

});

g.selectAll("path")
      .data(topojson.object(topology, topology.objects.countries)
          .geometries)
    .enter()
      .append("path")
      .attr("d", path)
});

// zoom and pan
var zoom = d3.behavior.zoom()
    .on("zoom",function() {
        g.attr("transform","translate("+
            d3.event.translate.join(",")+")scale("+d3.event.scale+")");
        g.selectAll("circle")
            .attr("d", path.projection(projection));
        g.selectAll("path")
            .attr("d", path.projection(projection));

  });

svg.call(zoom)

</script>
</body>
</html>

## thumbnail.png

      
    Raw
  

              thumbnail.png
            
          
## world-110m2.json

      
Display the source blob

    
Display the rendered blob

    
    Raw
  

              world-110m2.json
            
          
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code	city	country	lat	lon
ZNZ	ZANZIBAR	TANZANIA	-6.13	39.31
TYO	TOKYO	JAPAN	35.68	139.76
AKL	AUCKLAND	NEW ZEALAND	-36.85	174.78
BKK	BANGKOK	THAILAND	13.75	100.48
DEL	DELHI	INDIA	29.01	77.38
SIN	SINGAPORE	SINGAPOR	1.36	103.75
BSB	BRASILIA	BRAZIL	-15.67	-47.43
RIO	RIO DE JANEIRO	BRAZIL	-22.90	-43.24
YTO	TORONTO	CANADA	43.64	-79.40
IPC	EASTER ISLAND	CHILE	-27.11	-109.36
SEA	SEATTLE	USA	47.61	-122.33
	<!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="http://d3js.org/topojson.v0.min.js"></script>
	<script>
	var width = 960,
	height = 500;

	var projection = d3.geo.mercator()
	.center([0, 5 ])
	.scale(200)
	.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) {

	// load and display the cities
	d3.csv("cities.csv", function(error, data) {
	g.selectAll("circle")
	.data(data)
	.enter()
	.append("a")
	.attr("xlink:href", function(d) {
	return "https://www.google.com/search?q="+d.city;}
	)
	.append("circle")
	.attr("cx", function(d) {
	return projection([d.lon, d.lat])[0];
	})
	.attr("cy", function(d) {
	return projection([d.lon, d.lat])[1];
	})
	.attr("r", 5)
	.style("fill", "red");

	g.selectAll("text")
	.data(data)
	.enter()
	.append("text") // append text
	.attr("x", function(d) {
	return projection([d.lon, d.lat])[0];
	})
	.attr("y", function(d) {
	return projection([d.lon, d.lat])[1];
	})
	.attr("dy", -7) // set y position of bottom of text
	.style("fill", "black") // fill the text with the colour black
	.attr("text-anchor", "middle") // set anchor y justification
	.text(function(d) {return d.city;}); // define the text to display

	});

	g.selectAll("path")
	.data(topojson.object(topology, topology.objects.countries)
	.geometries)
	.enter()
	.append("path")
	.attr("d", path)
	});

	// zoom and pan
	var zoom = d3.behavior.zoom()
	.on("zoom",function() {
	g.attr("transform","translate("+
	d3.event.translate.join(",")+")scale("+d3.event.scale+")");
	g.selectAll("circle")
	.attr("d", path.projection(projection));
	g.selectAll("path")
	.attr("d", path.projection(projection));

	});

	svg.call(zoom)

	</script>
	</body>
	</html>