Converting geographic WGS 84 to Web Mercator 102100
I am trying to convert geographic coordinate system to Esri Webmercator, but when I do the conversion the resulted x and y have values of 0000003232112222… and 00000012665321…. This is very odd since coordinates as those do not exist.
var positions = [];
positions.push(x, y);
var g = new esri.geometry.Point(positions);
g = esri.geometry.geographicToWebMercator(g);
x = g.x;
y = g.y;
Answer
You should try geographicToWebMercator method in esri/geometry/webMercatorUtils module.see the detailed documentation.
//a point in GCS_WGS_1984(wkid is 4326)
var point = new Point(-118.15, 33.80, new SpatialReference({
wkid: 4326
}));
var pointWebMercator = webMercatorUtils.geographicToWebMercator(point);
alert("the point in 102100 is ( " + pointWebMercator.x + "," + pointWebMercator.y + " )");
a live demo:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no" />
<title>Converting geographic WGS 84 to Web Mercator 102100</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.20/esri/css/esri.css">
<style>
html,
body,
#map {
height: 100%;
margin: 0;
padding: 0;
}
</style>
<script src="https://js.arcgis.com/3.20/"></script>
<script>
var map;
require(["esri/map", "esri/geometry/Point", "esri/SpatialReference", "esri/geometry/webMercatorUtils", "dojo/domReady!"], function (Map, Point, SpatialReference, webMercatorUtils) {
map = new Map("map", {
basemap: "topo", //For full list of pre-defined basemaps, navigate to http://arcg.is/1JVo6Wd
center: [-122.45, 37.75], // longitude, latitude
zoom: 13
});
//a point in GCS_WGS_1984(wkid is 4326)
var point = new Point(-118.15, 33.80, new SpatialReference({
wkid: 4326
}));
var pointWebMercator = webMercatorUtils.geographicToWebMercator(point);
alert("the point in 102100 is ( " + pointWebMercator.x + "," + pointWebMercator.y + " )");
});
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>Hope it could help you.