Pitney Bowes MapInfo Professional - Manual (Page 285)

For details about using point or line objects to represent thematic variables, see Bivariate Thematic
Mapping in the MapInfo Professional Help System.
Adding Temporary Columns
Use Update Column to add temporary columns to a table by using data from another table.
To add a temporary column:
1. Open at least two tables.
2. Choose Table > Update Column.
The Update Column dialog box opens.
3. In the Table to Update list, choose the table to add the temporary column to.
4. In the Get Value from Table list, choose the table that MapInfo Professional will retrieve the update
information from.
5. To add a temporary column, select the Add new temporary column option from the Column to
Update list.
If necessary, specify the information MapInfo Professional will need to associate the data (join) in
the two tables by using their common tabular or graphic data.
6. Choose how to produce the column data by specifying how to calculate the information based on
columns and expressions from the Calculate and of lists.
7. Select the Browse Results check box to display the table with its new temporary column in browser
format.
8. Click OK.
The temporary column is added based on the specified information.
When you make changes to the data table, the new temporary column is automatically updated.
To save the table with its new temporary columns, use File > Save As. If the temporary columns are
added to a table in a workspace, the changes are automatically saved when you save the workspace.
The Help System contains the following topics about Bivariate Thematic Mapping:
• Types of Bivariate Maps
• Creating a Transparent Bivariate Layer (Ranged Theme)
• Creating a Transparent Bivariate Layer (Individual Value Theme
285 MapInfo Professional User Guide
Chapter 10: Creating Thematic and Other Themed Maps