Adding custom markers/polygons

Hi,

I would like to use Traccar to trace first aid volunteers in the field.
Therefore I would like to add some markers/polygons/area's to the map, so I know where the first aid posts are. Or where certain sectors are.

Is it possible to add these to Traccar?
It would be great if I would be able to use a custom map like uMap (which is based on OpenStreetMap) for this. (http://umap.openstreetmap.fr/nl/)

Thanks!

Regards,
Niels
Dutch Red Cross

You can already use custom maps:

https://www.traccar.org/map-layers/

As for markers, we will consider it.