How do I add units to geographical coordinates?

[BenColeman2]

I have a dataset with imbedded geographical coordinates. I think the units for those coordinates should be "m", but instead of units they have a "??". Does anyone know how to tell a dataset what units its geographical coordinates should be in?

Thanks

[DanPatterson_Retired]

For the dataset, it doesn't have a defined coordinate system.  If it is a geographic type, then the units are in decimal degrees

Define Projection—Help | ArcGIS for Desktop

some basics

What are geographic coordinate systems?—Help | ArcGIS for Desktop

What are projected coordinate systems?—Help | ArcGIS for Desktop

Specifying a coordinate system—Help | ArcGIS for Desktop

[JakeSkinner]

Hi Ben,

Can you provide more information?  For example, are you working with a feature class or shapefile?  When you refer to embedded coordinates, are you referring to the coordinate system?

[BenColeman2]

Hi Jake,

Thank you for the reply. I have since had a play and realised that I just needed to define the correct projected coordinate system.

Thanks for the help,

Ben

[DanPatterson_Retired]

third link in my post