A MapViewer data file must contain a primary ID (PID) and at least one variable. Each row contains a PID that is linked to an object on the map and that object’s associated data values.
If the data are already in a file, note that you do not need to display the data in a worksheet window. However, if the data are not in a file, you must first create a data file before you create a map. See Worksheet Document for additional information on data files, worksheet windows, and how to manipulate data in the worksheet.
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Next to Lesson 1.1 - Opening a Data File
Data as Numbers, Text, or Date/Time