Angular VectorMap - legends.source
grouping
The VectorMap's legend supports three grouping types.
color
Can be used if you have grouped map markers or areas in several differently-colored groups. For more information, refer to the layers's colorGroupingField and colorGroups property descriptions.size
Available for markers of a bubble type only. Can be used if you have grouped bubble markers in several groups and specified a size for bubbles in each group. For more information, refer to the sizeGroupingField and sizeGroups property descriptions.
If you have technical questions, please create a support ticket in the DevExpress Support Center.