topic Re: Change/Transform Geometry in Expression in ArcGIS Online Questions

Change/Transform Geometry in Expression

MarcoPoetsch_ret — Mon, 21 Jan 2019 03:04:09 GMT

Hi there,

I have the following issue:

I want to display the coordinates of points in AGOL in WKID 4326.
However, since the reference system of the map is different I get this error message:

Cannot create Geometry in this SpatialReference.
Engine is using a different spatial reference.

Is there a way to project the geometry using Arcade?

Re: Change/Transform Geometry in Expression

XanderBakker — Sat, 11 Dec 2021 23:53:00 GMT

Hi Marco Poetsch ,

Projection is not supported in the Arcade expression (yet). So in theory it is not possible to apply a projection in an Arcade expression. However, I have used a rather simple function to transform a point in Web Mercator Auxialiary Sphere to WGS 1984:

function MetersToLatLon(x, y) {
    // Converts XY point from Spherical Mercator EPSG:900913 to lat/lon in WGS84 Datum
    // Fuente: http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/
    var originShift = 2.0 * PI * 6378137.0 / 2.0;

    var lon = (x / originShift) * 180.0;
    var lat = (y / originShift) * 180.0;

    lat = 180.0 / PI * (2.0 * Atan( Exp( lat * PI / 180.0)) - PI / 2.0);
    return [lat, lon];
}‍‍‍‍‍‍‍‍‍‍‍

I have used this to create hyperlinks to Waze, Streetview and prefill a Survey123 surfey with a location. An example of how this is done (in Spanish) can be found here: https://community.esri.com/docs/DOC-11541-crear-un-enlace-para-navegar-con-waze-en-la-ventana-emergente-con-arcade

Re: Change/Transform Geometry in Expression

GSala — Tue, 17 Sep 2024 11:06:41 GMT

Hi XanderBakke,

There is any new in projections in arcade or they're not supported yet

Re: Change/Transform Geometry in Expression

BigLouC — Thu, 10 Apr 2025 18:35:16 GMT

Hi Xander,

do you have one that goes from 3857 to 2236, state plane XY?

Thanks