The JavaScript D3.js library provides interactive data visualizations for web page using HTML5, Scalable Vector Graphics, and Cascading Style Sheets. The geoNaturalEarth1() function in d3.js is used to draw the Natural Earth projection.
Syntax:
d3.geoNaturalEarth1()
Parameters: This method does not accept any parameters.
Returns: This method creates The Natural Earth projection from given JSON data.
Example #1: The following example creates NaturalEarth1 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"/> </head> <body> <div style="width:700px; height:500px;"> <center> <h3 style="color:black"> </h3> </center> <svg width="600" height="450"> </svg> </div> <script src= </script> <script>var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height");// NaturalEarth1 projection// Center(0, 0) with 0 rotationvar gfg = d3.geoNaturalEarth1() .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( 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 NaturalEarth1 projection of world with center at (0, 10) and rotating 60 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" /> </head> <body> <div style="width: 700px; height: 600px;"> <center> <h3 style="color: black;"></h3> </center> <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"); // NaturalEarth1 projection /*Center(0, 10) and 60 degree rotation w.r.t Y axis*/ var gfg = d3 .geoNaturalEarth1() .scale(width / 1.7 / Math.PI) .rotate([60, 0]) .center([0, 10]) .translate([width / 2, height / 2]); // Loading the json data /* Used json file stored at /datageojson/master/world.json*/ d3.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 :
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