D3 Examples -

Old school D3 from simpler times

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

.land {
  fill: rgb(117, 87, 57);
  stroke-opacity: 1;
}

.countries path {
  stroke: rgb(80, 64, 39);  
  stroke-linejoin: round;
  stroke-width:.5;
  fill: rgb(117, 87, 57);
  opacity: .1;
}

.countries path:hover {
  fill-opacity:.1;
  stroke-width:1;
  opacity: 1;
}

.graticule {
  fill: none;
  stroke: black;
  stroke-width:.5;
  opacity:.2;
}

.labels {
    font: 8px sans-serif;
    fill: black;
    opacity: .5;
}

.noclicks {
  pointer-events:none;
}

.point{
  opacity:.6;
}
</style>

<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://d3js.org/queue.v1.min.js"></script>
<script src="https://d3js.org/topojson.v0.min.js"></script>
<script>
// Lots of code from:
//  http://bl.ocks.org/3757125
//  http://bl.ocks.org/3795040

d3.select(window)
    .on("mousemove", mousemove)
    .on("mouseup", mouseup);

var width = 960,
    height = 500;

var proj = d3.geo.orthographic()
    .scale(220)
    .translate([width / 2, height / 2])
    .clipAngle(90);

d3.timer(autoRotate);

var path = d3.geo.path().projection(proj).pointRadius(1.5);

var graticule = d3.geo.graticule();

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

queue()
    .defer(d3.json, "world-110m.json")
    .defer(d3.json, "places.json")
    .await(ready);

function ready(error, world, places) {
  var ocean_fill = svg.append("defs").append("radialGradient")
          .attr("id", "ocean_fill")
          .attr("cx", "75%")
          .attr("cy", "25%");
      ocean_fill.append("stop").attr("offset", "5%").attr("stop-color", "#ddf");
      ocean_fill.append("stop").attr("offset", "100%").attr("stop-color", "#9ab");

var globe_highlight = svg.append("defs").append("radialGradient")
        .attr("id", "globe_highlight")
        .attr("cx", "75%")
        .attr("cy", "25%");
      globe_highlight.append("stop")
        .attr("offset", "5%").attr("stop-color", "#ffd")
        .attr("stop-opacity","0.6");
      globe_highlight.append("stop")
        .attr("offset", "100%").attr("stop-color", "#ba9")
        .attr("stop-opacity","0.2");

var globe_shading = svg.append("defs").append("radialGradient")
        .attr("id", "globe_shading")
        .attr("cx", "50%")
        .attr("cy", "40%");
      globe_shading.append("stop")
        .attr("offset","50%").attr("stop-color", "#9ab")
        .attr("stop-opacity","0")
      globe_shading.append("stop")
        .attr("offset","100%").attr("stop-color", "#3e6184")
        .attr("stop-opacity","0.3")

var drop_shadow = svg.append("defs").append("radialGradient")
        .attr("id", "drop_shadow")
        .attr("cx", "50%")
        .attr("cy", "50%");
      drop_shadow.append("stop")
        .attr("offset","20%").attr("stop-color", "#000")
        .attr("stop-opacity",".5")
      drop_shadow.append("stop")
        .attr("offset","100%").attr("stop-color", "#000")
        .attr("stop-opacity","0")

svg.append("ellipse")
        .attr("cx", 440).attr("cy", 450)
        .attr("rx", proj.scale()*.90)
        .attr("ry", proj.scale()*.25)
        .attr("class", "noclicks")
        .style("fill", "url(#drop_shadow)");

svg.append("circle")
        .attr("cx", width / 2).attr("cy", height / 2)
        .attr("r", proj.scale())
        .attr("class", "noclicks")
        .style("fill", "url(#ocean_fill)");
    
    svg.append("path")
        .datum(topojson.object(world, world.objects.land))
        .attr("class", "land")
        .attr("d", path);

svg.append("path")
        .datum(graticule)
        .attr("class", "graticule noclicks")
        .attr("d", path);

svg.append("circle")
        .attr("cx", width / 2).attr("cy", height / 2)
        .attr("r", proj.scale())
        .attr("class","noclicks")
        .style("fill", "url(#globe_highlight)");

svg.append("circle")
        .attr("cx", width / 2).attr("cy", height / 2)
        .attr("r", proj.scale())
        .attr("class","noclicks")
        .style("fill", "url(#globe_shading)");

svg.append("g").attr("class","points")
        .selectAll("text").data(places.features)
      .enter().append("path")
        .attr("class", "point")
        .attr("d", path);

svg.append("g").attr("class","labels")
        .selectAll("text").data(places.features)
      .enter().append("text")
      .attr("class", "label")
      .text(function(d) { return d.properties.name })

position_labels();
}

function position_labels() {
  var centerPos = proj.invert([width/2,height/2]);

svg.selectAll(".label")
    .attr("text-anchor",function(d) {
      return d.geometry.coordinates[0] < centerPos[0]-10 ? "end" :
             d.geometry.coordinates[0] < centerPos[0]+10 ? "middle" :
             "start"
    })
    .attr("x",function(d){ 
      var offset = d.geometry.coordinates[0] < centerPos[0]-10 ? -5 :
                   d.geometry.coordinates[0] < centerPos[0]+10 ? 0 :
                   5
      return proj(d.geometry.coordinates)[0]+offset 
    })
    .attr("y",function(d){ return proj(d.geometry.coordinates)[1]-2 })
    .style("display",function(d) {
      var labelPos = d.geometry.coordinates,        
          labelOffset = [ Math.abs(labelPos[0]-centerPos[0]),
                          Math.abs(labelPos[1]-centerPos[1]) ]
      return (labelOffset[0] > 88 || labelOffset[1] > 88) ? 'none' : 'inline';
    })
    
}

// modified from http://bl.ocks.org/1392560
var m0, o0;
function mousedown() {
  m0 = [d3.event.pageX, d3.event.pageY];
  o0 = proj.rotate();
  d3.event.preventDefault();
}
function mousemove() {
  if (m0) {
    var m1 = [d3.event.pageX, d3.event.pageY]
      , o1 = [o0[0] + (m1[0] - m0[0]) / 6, o0[1] + (m0[1] - m1[1]) / 6];
    o1[1] = o1[1] > 30  ? 30  :
            o1[1] < -30 ? -30 :
            o1[1];
    proj.rotate(o1);
    refresh();
  }
}
function mouseup() {
  if (m0) {
    mousemove();
    m0 = null;
  }
}

var r = 0;
function autoRotate() {
    if (m0 == null) {
      proj.rotate([ r += .75, proj.rotate()[1] ]);
      refresh();
    }
}

function refresh() {
  svg.selectAll(".land").attr("d", path);
  svg.selectAll(".countries path").attr("d", path);
  svg.selectAll(".graticule").attr("d", path);
  svg.selectAll(".point").attr("d", path);

position_labels();
}

</script>

Updated missing url http://d3js.org/d3.v3.min.js to https://d3js.org/d3.v3.min.js

Updated missing url http://d3js.org/queue.v1.min.js to https://d3js.org/queue.v1.min.js

Updated missing url http://d3js.org/topojson.v0.min.js to https://d3js.org/topojson.v0.min.js

https://d3js.org/d3.v3.min.js

https://d3js.org/queue.v1.min.js

https://d3js.org/topojson.v0.min.js