我正在尝试将地理坐标系转换为 Esri Webmercator，但是当我进行转换时，生成的 x 和 y 的值为 0000003232112222… 和 00000012665321…。 这很奇怪，因为坐标不存在。
var positions = [];
positions.push(x, y);
var g = new esri.geometry.Point(positions);
g = esri.geometry.geographicToWebMercator(g);
x = g.x;
y = g.y;
最佳答案
您应该尝试 esri/geometry/webMercatorUtils 模块中的 geographicToWebMercator 方法。请参阅详细信息 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 + " )");
现场演示:
<!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>希望对您有所帮助。
关于javascript - 将地理 WGS 84 转换为 Web 墨卡托 102100，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11957538/