The map group component serves two main functions:
It can manage a repeater in a Google Map component. Using more than one map group, you can make multiple repeaters for the same map.
Although the Google Map component can manage one repeater without a map group, map groups are required if you want more than one repeater, or if you want to place items at map coordinates without centering each item on its location.
The position properties for elements inside a map group component are special, because these properties position the elements geographically.
To create a map group whose components are placed at longitude and latitude coordinates on the map:
In the Outline, right-click the Google Map component, and select Insert > Components > Map Group.
The map group is added as a child of the Google Map.
Expand the Position and Size properties for the text component.
The position properties for elements inside the map group are special, because these properties position the elements geographically as described above.
A map group repeater can place items at latitude and longitude locations according to a table.
Before you can create a map group repeater, you must create a symbol for the repeater to use. You can create symbol parameters for latitude and longitude, and bind the latitude and longitude parameters to the Position and Size properties of the symbol root.
The map group repeater will use these position properties to place the symbol instances geographically, as described above.
To create a map group repeater:
In the Outline, right-click the Google Map component, and select Insert > Components > Map Group.
The map group is added as a child of the Google Map.
Select the map group in the Outline, and then open the Symbols panel.
Drag the symbol from the symbols panel to the the Symbol property, in the Property inspector, under Repeater.
Load the data that you want to use, including the latitude and longitude data.
You can do this by deleting the existing table and loading a new one as discussed in Working with Tables. Or, you can open the existing table and edit it manually.
Your table must include columns for any parameter values that you want to be driven by the table, such as image paths, labels, or color codes.
Bind the dataflow table to the Data property of the map group.