D3.js geoBertin1953() Function

Last Updated : 23 Sep, 2020

The geoBertin1953() function in d3.js is used to draw the Jacques Bertin’s 1953 projection. It makes the Baker Bertin’s 1953 projection from given geo JSON data.

Syntax:

d3.geoBertin1953()

Parameters: This method does not accept any parameters.

Return value: This method returns the Bertin1953 projection.

Example: The following example makes the Bertin’s 1953 projection of Africa.

HTML

<!DOCTYPE html>  
<html lang="en">  
  
<head>  
    <meta charset="UTF-8" />  
    <meta name="viewport"
        content="width=device-width,  
                initial-scale=1.0"/> 
    <script src= 
        "https://d3js.org/d3.v4.js"> 
    </script> 
    <script src= 
        "https://d3js.org/d3-geo-projection.v2.min.js"> 
    </script> 
</head> 
  
<body>  
    <div style="width:400px; height:300px;">  
        <svg width="600" height="300">  
        </svg>  
    </div>  
      
    <script> 
        var svg = d3.select("svg"), 
            width = +svg.attr("width"), 
            height = +svg.attr("height"); 
  
        // Bertin1953 projection 
        var gfg = d3.geoBertin1953() 
            .scale(width / 1.5 / Math.PI) 
            .translate([width / 2, height / 2]) 
  
        // Loading the json data  
        d3.json("https://raw.githubusercontent.com/" 
            + "janasayantan/datageojson/master/" 
            + "geoAfrica.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>