topic Re: Get LongLat of Point in ArcGIS JavaScript Maps SDK Questions

Get LongLat of Point

ChristianGruber — Mon, 08 Dec 2014 19:47:54 GMT

Hi,

I'm using ESRI JavaScript API and would like to know how I can transform a Point object (given X,Y and SpatialReference) to Longitude and Latitude? I already tried to create a new Point object and called getLatitude() / getLongitude() but it doesn't work.

Example data: X=154814.29750000034, Y=258542.16709999926, SpatialReference=31254

Any suggestions?

Thanks in advance,

Christian

Re: Get LongLat of Point

SteveCole — Mon, 08 Dec 2014 19:50:40 GMT

Yes- you'll need to add the webMercatorUtils into your project and use those methods.

Re: Get LongLat of Point

ChristianGruber — Mon, 08 Dec 2014 20:00:31 GMT

I tried

require(["esri/geometry/webMercatorUtils"], function (webMercatorUtils) {

var normalizedVal = webMercatorUtils.xyToLngLat(154814.29750000034, 258542.16709999926);

console.log(normalizedVal);

var value = webMercatorUtils.xyToLngLat(154814.29750000034, 258542.16709999926, true);

console.log(value);

});

but none of them returned correct values.

Re: Get LongLat of Point

HeikoHeijenga — Mon, 08 Dec 2014 20:28:00 GMT

Your data is not in a webmercator projection so you can't use webMercatorUtils. Instead you need to use the Geometry service to do the projection: geometryservice-amd | API Reference | ArcGIS API for JavaScript

See working sample here http://jsfiddle.net/Heiko/01examzx/