D3.js geoSatellite() Function
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= </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= </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:
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