topic Re: calculate geometry in ArcGIS Pro Questions

calculate geometry

PeterSmith3 — Thu, 18 May 2017 00:38:16 GMT

In ArcMap you can calculate a geometry value using either the PCS of the dataset or, alternatively, using the PCS of the data frame. Is there any way to do something similar with ArcGIS Pro?

I can calculate a field value using !shape.area@hectares! or !shape.length@meters!. But, as the data is hosted in ArcGIS Online, the calculations are done using Web Mercator Auxiliary Sphere. WMAS isn't any good for calculating accurate geometry values, and I don't want to have to download and reproject just to get accurate values.

Re: calculate geometry

DanPatterson_Retired — Thu, 18 May 2017 00:49:21 GMT

add-geometry-attributes The last parameter allows for a different coordinate system. As a side note, the procedures between arcmap and pro aren't going to match exactly, there is a strong focus on using tools in arctoolbox.

Re: calculate geometry

PeterSmith3 — Thu, 18 May 2017 01:27:33 GMT

Thanks Dan. Do you know if this tool works with hosted feature layers in ArcGIS Online? I was under the impression that it wasn't straightforward to alter online schemas.

Re: calculate geometry

DanPatterson_Retired — Thu, 18 May 2017 01:37:36 GMT

Sorry Peter... I don't do the online thing, so I will flag KGerrow-esristaff‌ would will most likely know.

Re: calculate geometry

shan_sarkar — Thu, 18 May 2017 08:02:05 GMT

Peter,

What is the actual projection of your dataset?

~Shan

Re: calculate geometry

PeterSmith3 — Wed, 24 May 2017 06:01:41 GMT

Hi Shan,

The dataset projection is WGS 1984 Web Mercator Auxiliary Sphere, WKID 3857