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How to get the unit of a Geometry? Or gets the distance in specified units between two geometries

YangYifei

Hi there. I'm trying to get the distance of two geometries by this api ArcGIS Pro 2.8 API Reference Guide - Distance Method—ArcGIS Pro.

But I found that I will get a result in meter from some .shp files. But when I use another .shp file, it seems to be kilometer...

I'm so confused about it. And I have searched API document, and found that I can set the LinerUnit if I use GeodesicDistance refers in ArcGIS Pro 2.9 API Reference Guide - GeodesicDistance(Geometry,Geometry,LinearUnit) Method—ArcGIS Pro.

But I have used 2.8 API, there's no this implement...

And I have tried to get the elevation unit format of the map, they're all meter in different .shp file.

So how can I get the unit type of a Geometry? Or can I change the distance result to meter directly?

Thanks a lot!

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Accepted answers

YangYifei

I found that GeodesicDistance can return the distance in meteres by default

ArcGIS Pro 2.8 API Reference Guide - GeodesicDistance Method—ArcGIS Pro

So I can use it to get the distance in LinearUnit.Meteres

And then convert it to other LinearUnit. It solved my problem.

Thank you so much!

All comments

CharlesMacleod

use the geometry spatial reference:

https://pro.arcgis.com/en/pro-app/2.8/sdk/api-reference/#topic8178.html

specifically, its Unit property.

https://pro.arcgis.com/en/pro-app/2.8/sdk/api-reference/#topic8797.html

In your case it sounds like it is of type LinearUnit.

YangYifei

Thanks for your reply!

I found that the special reference of my geometry is AngularUnit.Degrees.

And I try to convert it to LinearUnit.Meters.

But there's no such implement that can convert the unit from angular to linear...

So any other methods can I try?

Thank you!

YangYifei

I found that GeodesicDistance can return the distance in meteres by default

ArcGIS Pro 2.8 API Reference Guide - GeodesicDistance Method—ArcGIS Pro

So I can use it to get the distance in LinearUnit.Meteres

And then convert it to other LinearUnit. It solved my problem.

Thank you so much!

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