Pitney Bowes MapInfo Professional - Manual (Page 267)

• Customizing the Map Legend of a Bar Chart
• Modifying a Thematic Map
Pie Chart Maps
Thematic maps using pie charts enables you to examine more than one variable per record at a time.
Like comparing the height of the bars in bar charts, in pie charts you compare the wedges in a single
pie, or examine a particular wedge across all pies. Pie charts enable you to compare parts of a whole.
Both pie and bar charts are particularly useful for analyzing demographic data. For example, you have
a table of demographic information for the United States. Your table shows the populations of several
major demographic groups. Using pie charts, you can show the population of each demographic group,
and see what fraction of the pie it makes up in each pie. This enables you to see the distribution of
demographic groups on a per state basis, or across the entire United States. You can also look at one
demographic group and see how the population of the group varies in different states. For best results,
use no more than four to six pie wedges per pie chart in your analysis.
You can customize the color of each pie wedge as well as the borders of the wedges and the whole pie.
You can also specify the angle at which you want to place the first pie wedge, and whether the variables
go in a clockwise or counterclockwise direction. Like bar charts, you can also change the pie's orientation.
The default is to place the pie over the centroid of the object.
267 MapInfo Professional User Guide
Chapter 10: Creating Thematic and Other Themed Maps