D3.js geoSinusoidal() Function

Last Updated : 01 Oct, 2020

The JavaScript D3.js library provides interactive data visualizations for web page using HTML5, Scalable Vector Graphics, and Cascading Style Sheets. The geoSinusoidal() function in d3.js is used to draw the sinusoidal projection.

Syntax :

d3.geoSinusoidal()

Parameters : This method does not accept any parameters.

Returns : This method creates the Sinusoidal projection from given JSON data.

Example #1 : The following example creates sinusoidal projection of world with center at (0, 0) and without rotation.

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:700px; height:500px;">  
        <center>  
            <h3 style="color:black">  
            </h3>   
        </center> 
        <svg width="600" height="450"> </svg>  
    </div>  
  
    <script> 
  
      var svg = d3.select("svg"), 
      width = +svg.attr("width"), 
      height = +svg.attr("height"); 
  
     // Sinusoidal projection 
     // Center(0,0) with 0 rotation 
     var gfg = d3.geoSinusoidal() 
              .scale(width / 1.8 / Math.PI) 
              .rotate([0,0]) 
              .center([0,0]) 
              .translate([width / 2, height / 2]) 
  
     // Loading the json data 
     // Used json file stored at  
     // https://raw.githubusercontent.com/janasayantan 
     // /datageojson/master/world.json 
     d3.json("https://raw.githubusercontent.com/" 
     + "janasayantan/datageojson/master/world.json",  
     function(data){ 
  
         // Drawing 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:

Example 2: In following example we will create Sinusoidal projection of world with center at (-10, 0) and rotating 90 degree with respect to Y axis.

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:700px; height:600px;">  
        <center>  
            <h3 style="color:black"></h3>   
       </center> 
       <svg width="500" height="450"> </svg>  
    </div>  
  
    <script> 
  
       var svg = d3.select("svg"), 
       width = +svg.attr("width"), 
       height = +svg.attr("height"); 
  
      // Sinusoidal  projection 
      // Center(-10,0) and 90 degree 
      // rotation w.r.t Y axis 
      var gfg = d3.geoSinusoidal() 
               .scale(width / 1.8 / Math.PI) 
               .rotate([90,0]) 
               .center([-10,0]) 
               .translate([width / 2, height / 2]) 
  
     // Loading the json data 
     // Used json file stored at  
     // https://raw.githubusercontent.com/janasayantan 
     // /datageojson/master/world.json 
     d3.json("https://raw.githubusercontent.com/" 
     + "janasayantan/datageojson/master/world.json",  
     function(data){ 
  
         // Draw the map 
         svg.append("g") 
            .selectAll("path") 
            .data(data.features) 
            .enter().append("path") 
            .attr("fill", "grey") 
            .attr("d", d3.geoPath() 
            .projection(gfg) 
            ) 
            .style("stroke", "#ffff") 
         }) 
    </script> 
</body>  
  
</html> 