How Assign by Closest Stores Location works
To create customer derived trade areas around your customers or to create desire lines, your customer data must contain a field that associates each customer with a particular store. A number of analyses in Esri Business Analyst require that your customer data has a store assignment field. If you do not have such a field, you can create one using the Assign by Closest Stores Location tool. This method assigns each customer the ID of the store that is closest by straight-line distance.
The image below illustrates how these assignments are made. The image has two store locations (yellow and blue squares) and a set of customers (red triangles). In this simplified example, each of the customer points will inherit the store ID of the closest store location.
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You cannot undo the assignment of customers to stores in an existing field. Be careful not to overwrite an existing field.