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Field Maps Arcade Expression not grabbing geometry data

SeanNagy1

I created a new point layer in ArcGIS online and added it to a map. I want to automatically calculate the MSL vertical elevation using arcade and have done so before on other layers but for some reason the calculation doesnt work for this layer and I dont understand why. Below is a snapshot of the equation with the error message. When this work it normally displays a 0

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SeanNagy1

I figured it out. For some reason I just needed to have a single feature created and on that map and then the calculations worked. It didnt seem to want to work without a feature existing.

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SeanNagy1

I figured it out. For some reason I just needed to have a single feature created and on that map and then the calculations worked. It didnt seem to want to work without a feature existing.

jcarlson

You should be able to use the code as written. The result will show up in the Console tab of the expression builder.

SeanNagy1

You will have to excuse the limits of my knowledge with coding and arcade, anyway you can write out that exact code so I can do the debugging? I'm not sure how to write it out otherwise. It is just so weird because ive used this exact process before making the layer and then using the code and never had the issue with the calculation.

jcarlson

Seems odd, but I agree with @DavidPike that some debugging would be helpful.

Try assigning geometry($feature) to a variable and print to the Console, like

var geom = Geometry($feature)

Console(geom, geom['z'])

Understanding what's going into the rounding function will help explain why it's not returning what we want.

SeanNagy1

Its a brand new layer made in ArcGIS Online and selected the geometry and Z value options. The URL shows it has both enabled

DavidPike

You checked that all features have a Z value? possibly an if/else to catch exceptions would be good practice.

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