D3.js is a JavaScript library which provides interactive data visualizations for web pages using HTML5, Scalable Vector Graphics and Cascading Style Sheets. The geoGringortenQuincuncial() function of D3.js is used to draw the Gringorten square equal-area projection.
Syntax:
d3.geoGringortenQuincuncial()
Parameters: This method does not accept any parameter.
Return Values: This method creates Gringorten square equal-area projection from the given JSON data.
Example 1: The following example draws geoGringortenQuincuncial projection of world with 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" /> </head> <body> <div style="width:700px; height:500px;"> <svg width="600" height="450"> </svg> </div> <script src= </script> <script src= </script> <script> var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height"); // GringortenQuincuncial projection // Center(0, 0) with 0 rotation var gfg = d3.geoGringortenQuincuncial() .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 // /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: The following output shows GringortenQuincuncial projection of world with no rotation and centered at (0, 0)
Example 2: The following example draws GringortenQuincuncial projection of world after altering 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" /> </head> <body> <div style="width:700px; height:600px;"> <svg width="500" height="450"></svg> </div> </script> <script src= </script> <script> var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height"); // GringortenQuincuncial projection // Center(0, 20) and 20 degree // rotation to Y axis var gfg = d3.geoGringortenQuincuncial() .scale(width / 1.5 / Math.PI) .rotate([20, 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", "Turquoise") .attr("d", d3.geoPath() .projection(gfg) ) .style("stroke", "#ffff") }) </script> </body> </html> |
Output: The following output shows the GringortenQuincuncial projection with 20 degree rotation with respect to Y axis and centered at (0, 20)
