artillery with map click only?

[oneisdown 16]

Is there any  way i can remove the ingame round curser and make players only option to just use the map to direct arty fire? I am building a mission where there is no icons and it is too easy for a player just to point at a building and rain death. I really dont want to use any mods to implement a new system to call in fire.

[lawman_actual 24]

Something like?:

 

 - use show map when it comes to select support location

 - at start of script called when location is selected:

 

if (!visibleMap) exitWith {systemChat "no location given";};

showMap false;

_provider sideChat "Roger, Coordinates received";

etc etc.