A map is a graphical representation of geographical data. It is used to represent the statistical data of a particular geographical area on Earth.
The maps control reads the main file (.shp) and creates the map shapes. The associated .dbf file contents are then incorporated with the shapes created from the main files.
Bubbles in the maps control represent the under-bound data values of the map.
Markers are notes that are used to pinpoint elements on the map based on the latitude and longitude.