HP Intelligent Management Center Standard Software Platform - Manual (Page 394)

pie) of electricity because of the hydropower in that region, while Idaho would
probably use a high percentage (a large slice of the pie) of natural gas.
You can use this map type to compare the distribution of several items within
a particular region. You can also specify that the pie charts be sized
proportionately so that, as with the symbols in a Graduated map, the pie
charts will appear in various sizes, depending on the underlying data values.
This will allow you to compare the totals between regions.
Bar Chart
A Bar Chart map works like a Pie Chart map, but may be more useful for
certain sets of data. Typically, you would use a Bar Chart map for items that
do not total 100%; that is, for data items that do not make a whole, or for
data items that are unrelated. For example, you could create a Bar Chart
map that displays use of heating fuel by region. You might choose to analyze
use of three types of fuel: electricity, gas, and solar. Each bar chart on the
map could contain individual bars for each of these types. In this example,
the data items (electricity, gas, and solar) do not comprise a whole. There
may be other types of fuel used in these regions, such as wood, but this map
only focuses on three of them. Also, the purpose of the map is to compare
each region's use of each fuel type with that of every other region. In a Pie
Chart map, you could show these three fuel types as percentages of the
entire fuel use within each region, and though you could compare the
percentages for each region, you would probably not be able to compare
the actual values for each region because each region would have the same
total value (100%).
Where to place a map
When you choose where to place the map, you determine the amount of
data that will be included in the map. For example, if you place the map in
the Report Header section, the map includes data for the entire report. If you
place it in a Group Header or Group Footer section, it displays group-specific
data. This choice will also determine whether the map prints once for the
entire report, or many times (once for each instance of a given group).
Note:
If your report contains subreports, you can place maps in those subreports
as well.
394 Crystal Reports 2008 SP3 User's Guide
Mapping 15
Mapping concepts