A geo bubble map is
a bubble plot that is overlaid on a geographic map. Each bubble is
located at a geographic location or at the center of a geographical
region. The bubbles are automatically colored based on the location.
You provide a measure data item that determines the size of the bubble.
A geo bubble map requires a data item that contains geographical information
and is assigned to a geography role.
Many types of data have
a spatial aspect, including demographics, marketing surveys, and customer
addresses. For example, if a user needs to evaluate population data
for U.S. Census tracts, a report designer could display the information
in a table. However, it would be easier and more effective for the
person using the report to see the information in the context of the
geography of the tracts. When evaluating information that has a spatial
component, users might find it easier to recognize relationships and
trends in the data if they see the information in a spatial context.
You can add a geo bubble
map only if the report uses data items from a data source that is
enabled for geographic mapping. A geo bubble map requires a geography
variable with the role type of geography. For more information,
see Insert Geo Bubble Maps into a Report.
You can create a filter
or brush interaction between a geo bubble map and other report objects
in your report or dashboard. When you click on a specific region or
city, the other report objects filter or highlight to show the same
location.
Note: Certain exported geo bubble
maps (for example, geo maps that use custom roles or data sets that
have centroids) cannot be fully modified in the designer.