Step 3 : Define Primary Key

  1. Select the .map file and right-click to select Open Properties

  2. Select an appropriate Primary key and click Next.

    Figure 2.4. Select Primary Key

    Select Primary Key

Tip

Why is ADMIN_NAME a more appropriate primary key?

If the base map has many regions, it may be a better choice to show as a hovering legend when the cursor is placed over each region.