Emma.ai will create travel events that start from your last known location. This can be two possibilities:
The location of your previous appointment
The location of your most recent Base (if there was sufficient time to travel to your Base from your previous appointment first)
If you want to set a default location that Emma.ai will always use as the starting point for your travel you can create a Base and assign all day periods (00:00 to 23:59) to it.
What happens if I have no base?
If no Base is specified at all, Emma.ai will only start travel from the location of your previous appointment
What happens if I have more two or more Bases at the same time?
If you have multiple Bases then the nearest base will be selected by Emma.ai.