Winding Order

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

body {
  margin: 0;
}

svg {
  font: 10px sans-serif;
  border: solid 1px #ccc;
  margin-bottom: 10px;
}

</style>
<svg style="position:absolute;top:-1000px;">
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</svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var A = {type: "Polygon", coordinates: [[[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]]]},
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</script>
<script>

var path = d3.geoPath(d3.geoOrthographic().rotate([-20, -20]).precision(0.1));

var svg = d3.select("body").selectAll()
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svg.append("path")
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svg.append("path")
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svg.append("path")
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svg.append("text")
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svg.append("text")
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<script>

var path = d3.geoPath(d3.geoIdentity().translate([480 - 50, 250 - 50]).scale(10));

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    .attr("width", 958)
    .attr("height", 500);

svg.append("path")
    .attr("fill", "red")
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svg.append("text")
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    .attr("dy", "0.71em")
    .text(function(d) { return "ring = " + JSON.stringify(d.coordinates[0]); });

svg.append("text")
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    .attr("dy", "2em")
    .text(function(d) { return "area = " + path.area(d); });

</script>

https://d3js.org/d3.v4.min.js