Map with combined data not only show the current position of a thing in the world, but also informs the user on the status of the thing (e.g., the thing has risen an alarm). In this widget, you will be able to see the current position of a thing by means of several markers, each of these corresponding to a given status.
This option, if enabled, will allow you to write the name of an attribute which will be used to retrieve the position of a thing instead of a geolocation parameter.
For an exhaustive list of the widgets you can use in Omnyvore's main dashboards, please refer to the Available widgets subsection.