topic Re: Field area calculation using arcade function is not giving me the right result. in ArcGIS Pro Questions

Field area calculation using arcade function is not giving me the right result.

AbiDhakal — Fri, 12 Jul 2019 15:53:56 GMT

Hello GIS friends,

I am trying to run field calculation for area with arcade function, (round(Area($feature, 'acres'),1), but it is giving me only '0's all the way. The calculation runs with no error but the result is populated with '0' for all the rows. What am I doing wrong?

Thank you friends and happy Friday!

Re: Field area calculation using arcade function is not giving me the right result.

xlt208 — Fri, 12 Jul 2019 19:23:36 GMT

Hello Abi,

Happy Friday! The Arcade expression looks good. What is the type of your target field? We might want to use Double here. The area values will be rounded off to the nearest whole number if the field is Integer.

Keep me updated

Re: Field area calculation using arcade function is not giving me the right result.

DavidBayer — Sat, 13 Jul 2019 11:29:24 GMT

Hello Abi,

The script looks correct, however there maybe a bug and the calculator is not realising that the geometry is needed for each feature, and so is not fetching it.

You could try:

(round(Area(geometry($feature), 'acres'),1)

This extra big of logic may make the field calculator detect the use of feature geometry.

Re: Field area calculation using arcade function is not giving me the right result.

XanderBakker — Mon, 15 Jul 2019 16:46:40 GMT

Hi Abi Dhakal ,

Your formula and the one provided by David Bayer are both correct in case you have projected data. If your data is using a geographic coordinate system like GCS WGS 1984, it is very likely that all records will return 0. You will have to project the data to avoid this behavior.

Re: Field area calculation using arcade function is not giving me the right result.

AbiDhakal — Thu, 18 Jul 2019 22:07:14 GMT

Hello Lingtao,

Thank you for your suggestion. The field is double. I again ran the rule and checked the data and now it seems to run normally.

Thank you so much for your input.

I am just coming back from a meeting and had not had a chance to respond to your message for that I am sorry.

Thank you again.

Abi

Re: Field area calculation using arcade function is not giving me the right result.

AbiDhakal — Thu, 18 Jul 2019 22:09:16 GMT

Hey David,

Thank you for it is working now. I reran it and it looks good. I will save your arcade function for my future use as well.

Abi

Re: Field area calculation using arcade function is not giving me the right result.

AbiDhakal — Thu, 18 Jul 2019 22:11:18 GMT

Thank you Xander. I have a projected coordinate system.

I do not know what I was doing wrong but it is working now. I really appreciate your input.

Thank you again.

Abi

Re: Field area calculation using arcade function is not giving me the right result.

xlt208 — Fri, 19 Jul 2019 11:45:57 GMT

Abi,

Thanks for keeping me updated! It's great that things are getting back on track!

Have a lovely weekend,

Lingtao

Re: Field area calculation using arcade function is not giving me the right result.

dodeny — Sat, 12 Aug 2023 09:52:16 GMT

Hi Xander,

I faced a similar situation. When I test this expression in Arcade Calculator "round(Area(geometry($feature), 'hectares'),2)" the result is "The input unit and the spatial reference unit are not of the same unit type i.e Linear vs.Angular".

What Expression should I add in order to calculate the area?