The geoBoggs() function in d3.js is used to draw the Boggs eumorphic projection. The Boggs eumorphic projection is a pseudo cylindrical, equal-area map projection used for world maps. It makes Boggs eumorphic projection from given geo JSON data.
Syntax:
d3.geoBoggs()
Parameters: This method does not accept any parameters.
Return Value: This method returns the Boggs projection.
Example: The following example makes the Boggs projection of Asia.
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content= "width=device-width, initial-scale=1.0" /> <script src= </script> </head> <body> <div style="width:700px; height:500px;"> <center> <h4 style="color:green"> Boggs Projection of Asia </h4> </center> <svg width="500" height="200"> </svg> </div> <script> var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height"); // Boggs projection var gfg = d3.geoBoggs() .scale(width / 1.5 / Math.PI) .translate([width / 2, height / 2]) // Loading the json data d3.json( + "janasayantan/datageojson/master/" + "geoasia.json", function (data) { // Draw the map svg.append("g") .selectAll("path") .data(data.features) .enter().append("path") .attr("fill", "black") .attr("d", d3.geoPath() .projection(gfg) ) .style("stroke", "#ffff") }) </script> </body> </html> |
Output:
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