# Flow zone presentation

The  [Default](flow_zone:default) zone is dedicated to isolate elements that are not needed in the preprocessing zone.

The example below illustrates the flow structure when: 
- *locations* can be located with addresses (ie we need to geocode it)
- *customers* can be located with *latitude* and *longitude* columns (no need to geocode it)

![default_zone.png](q1ltzoTVCH5Z)