Interrupted Homolosine Condensed (Work In Progress) by fil

This interrupted homolosine projection is available as d3.geoInterruptedHomolosine in d3-geo-projection.

Working on the “condensed” version used by Herbert Bayer and the CCA in The World Geographical Atlas.

Will need much more :) See https://github.com/rveciana/d3-composite-projections/tree/master/src

Forked from mbostock‘s block: Interrupted Homolosine

forked from Fil‘s block: Interrupted Homolosine Condensed

index.html

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

.stroke {
  fill: none;
  stroke: #000;
  stroke-width: 3px;
}

.fill {
  fill: #fff;
}

.graticule {
  fill: none;
  stroke: #777;
  stroke-width: 0.5px;
  stroke-opacity: 0.5;
}

.land {
  fill: #222;
}

.boundary {
  fill: none;
  stroke: #fff;
  stroke-width: 0.5px;
}

</style>
<svg width="960" height="484"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="d3-geo.js"></script>
<script src="d3-geo-projection.js"></script>
<script src="https://d3js.org/topojson.v2.min.js"></script>
<script>

var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height");

  
var projections = [
  d3.geoInterruptedHomolosine()
  .clipPolygon({type: "Polygon", coordinates: [[[-20,0], [-30,0], [-30,45],[-70,45],[-70,89.9], [180,89.9], [180,0], [180,-89.9], [-20,-89.9], [-20, 0]]]})
.clipExtent([[480,0],[960, 500]])
  ,
  d3.geoInterruptedHomolosine()
.lobes([[[[-180,0],[-100,90],[90,0]]],[[[-180,0],[-160,-90],[-100,0]],[[-100,0],[-60,-90],[-20,0]],[[-20,0],[20,-90],[80,0]],[[80,0],[140,-90],[180,0]]]])
.clipPolygon({type: "Polygon", coordinates: [[[-179,0], [-179,89], [-10,89],
                                              [-10, 60], [-40, 60], [-40,10],
                                              [-30,10],
                                              [-30,-89], [-180,-89], [-180, 0]]]})
  //.clipExtent([[0,0],[480, 500]])
  ];

    var paths = projections.map(p => d3.geoPath(p));
    var projection = {};
    projection.invert = function(p) {
      for( var i = 0; i < projections.length; i++) {
        var k = projections[i].invert(p);
        if (k && paths[i]({type:"Point", coordinates: k}))
          return k;
      }
    }

  
var graticule = d3.geoGraticule();

    var path = function(d) {
      return paths.map(p => p(d))
      .filter(d => !!d)
      .join("") || null; 
    }

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

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

defs.append("clipPath")
    .attr("id", "clip")
  .append("use")
    .attr("xlink:href", "#sphere");

svg.append("use")
    .attr("class", "stroke")
    .attr("xlink:href", "#sphere");

svg.append("use")
    .attr("class", "fill")
    .attr("xlink:href", "#sphere");

svg.append("path")
    .datum(graticule)
    .attr("class", "graticule")
//    .attr("clip-path", "url(#clip)")
    .attr("d", path);

var marker = svg.append("path")
  .attr("fill", "red")

svg.on('mousemove', function() {
  var mouse = d3.mouse(this);
  marker.attr("d", path({type:"Point", coordinates: projection.invert(mouse)}));
});


d3.json("https://gist.githubusercontent.com/mbostock/4090846/raw/d534aba169207548a8a3d670c9c2cc719ff05c47/world-110m.json", function(error, world) {
  if (error) throw error;

  svg.insert("path", ".graticule")
      .datum(topojson.feature(world, world.objects.land))
      .attr("class", "land")
      //.attr("clip-path", "url(#clip)")
      .attr("d", path);

  svg.insert("path", ".graticule")
      .datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
      .attr("class", "boundary")
      //.attr("clip-path", "url(#clip)")
      .attr("d", path);
});

</script>