"Geographical Map" without Internet


I need to use the “Geographical Map” without an Internet connection.
I have seen that this is possible with a local “tile server”.

Map download Geofabrik Download Server
How-to Serving Tiles – Switch2OSM

Only the OpenNMS configuration file opennms.properties ( gwt.openlayers.url ) must be modified ?

Is there any other solution ?

Thanks in advance

I have used the above solution, everything is working as expected