ANTH 124A: Maritime Archaeology GIS Project

You can start an editing session to add a new field and/or calculations to your feature class, etc. For example, I could use the field calculator to combine my easting and northing fields into a single UTM field.

1. To add a new field, start an editing session. Then, open the attribute table for the feature class you want to edit. 
2. Click Field: Add to add a new field.
   
3. Fill out the Field Name, Data Type, etc. for the field (e.g., Field name: UTM_Coords. Data type: Text).
4. Save your changes to add the new field.
   
5. The new field will be added as a blank column in your attribute table. You will need to scroll to the far right in the attribute table to view it.

The next step is to calculate values for the newly created field:

1. In the attribute table, click the column header for your newly created field, then click Field: Calculate to open the field calculator.
   
2. You can calculate new fields using Python or Arcade, which is an expression language used by ArcGIS Pro.
   • Select your input table.
     
   • Create a new or existing field name (e.g., UTM).
     
   • Select an Expression Type. You can use Python or Arcade expressions.
     
   • Create your expression, then click OK to calculate the new field. I used an Arcade expression to create a new field that included the UTM zone, followed by the easting and northing coordinates:
     
     Concatenate("30N", " ", $feature.Easting, " ",$feature.Northing)
     
     
      
   • The result is a new field with the UTM Zone, easting, and northing.