The function geoNaturalEarth() is used to return the Natural Earth projection.
Syntax :
d3.geoNaturalEarth()
Parameters: This method does not accept any parameters.
Return Value: This method creates and returns geoNaturalEarth() projection from given JSON data.
Example 1: The following example creates geoNaturalEarth() projection of the world with the 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:600px;" >
< svg width = "700" height = "550" >
</ svg >
</ div >
< script >
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
// Natural Earth projection
// Center(0,0) and no rotation
var gfg = d3.geoNaturalEarth()
.scale(width / 1.5 / Math.PI)
.rotate([0, 0])
.center([0, 0])
.translate([width / 2, height / 3])
// Loading the json data
d3.json("https://raw.githubusercontent.com/"
+"epistler999/GeoLocation/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:
Example 2: In the following example we will create geoNaturalEarth() projection of the world with the center at (30, 0) and rotating 30 degrees anti-clockwise 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;" >
< svg width = "700" height = "550" >
</ svg >
</ div >
< script >
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
// geoNaturalEarth() projection
// Center(30, 0) and 30 degree rotation
var gfg = d3.geoNaturalEarth()
.scale(width / 1.5 / Math.PI)
.rotate([-30, 0])
.center([30, 0])
.translate([width / 2, height / 2])
// Loading the json data
// Used json file stored at
// GeoLocation/master/world.json
d3.json("https://raw.githubusercontent.com/"
+"epistler999/GeoLocation/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: