D3.js geoGinzburg6() Function
D3.js is a JavaScript library for producing dynamic, interactive data visualizations in web browsers. It makes use of Scalable Vector Graphics, HTML5, and Cascading Style Sheets standards.
The geoGinzburg6() function in d3.js is used to draw the Ginzburg VI projection.
Syntax:
d3.geoGinzburg6()
Parameters: This method does not accept any parameters.
Return Value: This method creates and returns the Ginzburg6 projection from the given JSON data.
Example 1: The following example makes Ginzburg6 projection of the world with the center at (0,0) and 0 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= </script></head> <body> <div style="width:700px; height:500px;"> <svg width="600" height="450"> </svg> </div> <script> var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height"); // Ginzburg6 projection // Center(0,0) with 0 rotation var gfg = d3.geoGinzburg6() .scale(width / 1.5 / Math.PI) .rotate([0,0]) .center([0,0]) .translate([width / 2, height / 2]); // Loading the json data d3.json( +"janasayantan/datageojson/master/world.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:
Ginzburg6 projection of World with no rotation and centered at (0,0)
Example 2: The following example draws Ginzburg6 projection of the world after customizing the center and 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= </script></head> <body> <div style="width:500px; height:600px;"> <svg width="500" height="450"> </svg> </div> <script> var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height"); // Ginzburg6 projection // Center(20,20) and 45 degree // rotation w.r.t Y axis var gfg = d3.geoGinzburg6() .scale(width / 1.3 / Math.PI) .rotate([45,0]) .center([20,20]) .translate([width / 2, height / 2]) // Loading the json data d3.json( +"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> |
Output:
Ginzburg6 projection with 45-degree rotation w.r.t X-axis and centered at (20,20)
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