topic Re: Arcade Expression for Geometry in ArcGIS Online Popup in ArcGIS Online Questions

Arcade Expression for Geometry in ArcGIS Online Popup

MaryEllen_Perko — Mon, 31 Jul 2017 15:44:29 GMT

Hi. In ArcGIS Online using the web map Attribute Expressions builder, I'm trying to pull feature xy coordinates to show in a popup. In the builder, my code successfully tests with a value; but the value in the popup and layer table is empty. I'm using a map service if that matters.

So, is this code supposed to work? Or am I doing something wrong?

Thanks.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Mon, 31 Jul 2017 16:02:36 GMT

Not sure what might be going wrong in your case. I just configured something similar and it works.

I entered the pop-up settings and added two expressions:

and the result is displayed:

Re: Arcade Expression for Geometry in ArcGIS Online Popup

KenBuja — Mon, 31 Jul 2017 16:26:07 GMT

This function seems to work properly.

Text(Geometry($feature).x);

and returns this in the popup

Have you checked the popup configuration to see if it's displaying the custom expression?

Re: Arcade Expression for Geometry in ArcGIS Online Popup

MaryEllen_Perko — Mon, 31 Jul 2017 16:36:58 GMT

Thanks for the help so far. Are you using map services or feature layers/services?

Thanks.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Mon, 31 Jul 2017 16:57:09 GMT

I used a hosted feature service.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

KenBuja — Mon, 31 Jul 2017 17:12:06 GMT

I also tried this using this map service: Hurricanes (MapServer)

It worked as well.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

MaryEllen_Perko — Mon, 31 Jul 2017 18:42:02 GMT

Thanks everyone for the help so far. I do see the code works with map services. The field in the table won't always populate (for me anyway) so I didn't catch that it worked in the popup.

I think the problem is with the map service I started with. I haven't figure out why, yet, but it appears that the "point" feature-type layer loaded via the map service is really a "multipoint" layer/feature class. For some reason the point-related arcade expression code works with the layer in the expression builder, but perhaps not outside of the builder. I'm looking more closely at our map service and the map viewer.

If anyone would like to take a closer look, here's the map service: NCDOT_STIP (MapServer)

Thanks again. I really appreciate the help.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Mon, 31 Jul 2017 19:14:57 GMT

For multipoint geometry you may want to try this:

return Round(Geometry($feature).points[0].X, 2)‍‍

and:

return Round(Geometry($feature).points[0].Y, 2)‍‍

... since it is a collection of points although each multipoint only has a single point (as far as I could see from a query on your REST service)

Re: Arcade Expression for Geometry in ArcGIS Online Popup

AdministraciónSIG — Wed, 09 Jan 2019 20:47:55 GMT

How can i get de X and Y point from my feature in the coordenate system from the rest url?

I need to create a custom expression to put it on the popup window with this info.

the Geoametry function retorns only in web mercator.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Wed, 09 Jan 2019 21:33:58 GMT

In case you need the coordinates in WGS 1984, I have a couple of posts that show an example of how you can convert Web Mercator coords to WGS 1984. This might be useful in case you need to create a hyperlink to Streetview or Waze or send the coordinates to prefill a Survey123 form.

Examples (in Spanish) can be found here:

Re: Arcade Expression for Geometry in ArcGIS Online Popup

KevinThompson — Wed, 24 Apr 2019 19:35:26 GMT

Hello Xander:

Thank you for posting this! I am wondering why my conversions are not lining up with my coordinates calculated in Arcmap. Is this the limit of this method as it is already less than 1 metre or do i need to set my Origin Shift differently perhaps?

X Conversion:

var originShift = 2.0 * PI * 6378137.0 / 2.0;
var lon = (Geometry($feature).x / originShift) * 180.0;
return [lon];

Y Conversion:

var originShift = 2.0 * PI * 6378137.0 / 2.0;
var lat = (Geometry($feature).y / originShift) * 180.0;
lat = 180.0 / PI * (2.0 * Atan( Exp( lat * PI / 180.0)) - PI / 2.0);
return [lat];

Kind Regards

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Wed, 24 Apr 2019 19:40:07 GMT

The arcade expression to calculate the lat/lon values is not the most precise way of calculating the data. In addition depending on the view scale Arcade might not retrieve the exact location from the feature. The precision will do to launch navigation with Waze or open a window with Streetview, but is not the solution for an exact conversion of the coordinates. I am still waiting for the projection engine to be implemented in Arcade to obtain more exact results.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

KevinMayall — Mon, 29 Apr 2019 19:17:34 GMT

Hopefully there will be a blog post when the projection engine comes to Arcade.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

ANILBaral — Thu, 30 May 2019 16:27:32 GMT

Is there a way to display the location of a point in pop up using the arcade or any other way to add location in pop up along with other attributes that i get from arcade expression??

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Sat, 11 Dec 2021 20:21:26 GMT

Yes, you can. You can access the coordinate properties of a geometry and include those in the pop-up using Arcade. See example below:

var geom = Geometry($feature);
return "(" + Round(geom.x, 3) + ", " + Round(geom.y, 3) + ")";‍‍

Re: Arcade Expression for Geometry in ArcGIS Online Popup

ANILBaral — Thu, 30 May 2019 23:20:39 GMT

i am trying to say i want to include the address of a point in a pop up using arcade(something like reverse geocode to get the address of a point as it is displayed in google map)!! i have a point layer which is editable by the user. When user adds a point i want address be displayed in the popup along with other attribute.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Fri, 31 May 2019 13:13:35 GMT

Reverse geocoding is not available through Arcade.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

BraulioGalvez1 — Fri, 28 Feb 2020 13:07:33 GMT

Hi Xander Bakker‌, Is possible do the transformation of LatLong to UTM coordinates? Or There is any code in arcade that show coordinates in UTM directly?

Best regards.

Braulio.

Re: Arcade Expression for Geometry in ArcGIS Online Popup

XanderBakker — Fri, 28 Feb 2020 16:18:54 GMT

Hi/Hola Braulio Galvez ,

At this moment, only if you have a formula that allows to calculate the coordinates that you want, this is possible. As shown in the examples I shared above: https://community.esri.com/thread/199141-arcade-expression-for-geometry-in-arcgis-online-popup#comment-823702

Hopefully, in the near future there will be support for a transformation engine, or what I have heard, being able to make web requests in Arcade to do this transformation using a REST call and interpret the result. This last feature is something that is on the roadmap, but I don not know the ETA.