idea Field Maps - access to Shape_Area and Shape_Length fields in ArcGIS Field Maps Ideas

Field Maps - access to Shape_Area and Shape_Length fields

AndyBates — Thu, 17 Aug 2023 12:04:07 GMT

We perform calculations on polygon data (in British National Grid) using Area and Length information. Currently in Field Maps you can not access the Shape_Area and Shape_Length fields in Arcade. Would it be possible to make these accessible, which means we could produce accurate calculation on the fly for some fields during the course of the survey. This would greatly assist in identifying at an early stage if further surveys are required (some of which could be done quite promptly rather than waiting).

Re: Field Maps - access to Shape_Area and Shape_Length fields

KenBuja — Thu, 17 Aug 2023 15:57:37 GMT

Have you looked at using the Geometry Area and Length functions to do these calculations?

Re: Field Maps - access to Shape_Area and Shape_Length fields

JB_SEPA — Fri, 18 Aug 2023 10:17:30 GMT

Yes I can confirm I had the same issue here. The feature in Field Maps had to be drafted and committed to the hosted feature layer FIRST before the Shape_Area value could be used for volume calcs on the fly.

Old code:

Abs(($feature.Shape__Area* ($feature["Height_depth_m"]- 0.75)))

New code calculates volume on the fly in Field Maps so sweetly now.

Abs((Area($feature, 'square-meters') * ($feature["Height_depth_m"]- 0.75)))

Re: Field Maps - access to Shape_Area and Shape_Length fields

AndyBates — Fri, 18 Aug 2023 11:17:33 GMT

Thanks for the responses. I should have made it clearer. We are aware of Area and AreaGeodetic functions, but the issue with these is their accuracy depends on the zoom levels and is measured in Web Mercator / WGS84. We need accurate measurements in British National Grid (which our data is in), as the results where marginal effect if further work is required.