When a acceptable zoom level is reached, the frontend is going to
query the DB for the eligibility data associated to the region the
user is viewing.
When requesting too much data, the frontend gets pretty slow. In order
to prevent that, we require a minimal zoom level before triggering the
We fetch the eligibility data from the backend for the area the user
is currently viewing.
We don't want to trigger the search when the user is zoomed out, it
could be heavy on the backend CPU. Hence, we trigger the fetch after
the user searched for his real address or reached a good-enough zoom level.
The backend is currently returning a dummy answer.