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D3.js geoSatellite() Function

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

Syntax :  

d3.geoSatellite()

Parameters: This method does not accept any parameters.

Return Value: This method creates the Satellite  projection from given JSON data.

Example 1: The following example creates Satellite projection of world with center at (0, 0) and no 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=
    </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");
  
       // Satellite projection
       // Center(0,0) with 0 rotation
       var gfg = d3.geoSatellite()
                 .scale(width / 1.1 / Math.PI)
                 .rotate([0,0])
                 .center([0,0])
                 .translate([width / 2, height / 2])
  
       // Loading the json data
       // Used json file stored at 
       // /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", "SeaGreen")
              .attr("d", d3.geoPath()
                  .projection(gfg)
               )
              .style("stroke", "#ffff")
        })
    </script>
</body
  
</html>


Output:

Example 2: In following example we will create  Satellite projection of world with center at (0, -20) 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=
    </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");
  
        // Satellite  projection
        // Center(0,-20) and 90 degree
        // rotation w.r.t Y axis
        var gfg = d3.geoSatellite()
                  .scale(width / 1.0/ Math.PI)
                  .rotate([90,0])
                  .center([0,-20])
                  .translate([width / 2, height / 2])
  
        // Loading the json data
        // Used json file stored at 
        // /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", "SlateBlue")
              .attr("d", d3.geoPath()
                  .projection(gfg)
              )
              .style("stroke", "#ffff")
        })
    </script>
</body
  
</html>


Output:



Last Updated : 30 Sep, 2020
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