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On typing rosservice info /global_localization, you can observe Type: std_srvs/Empty

So you may do service call like rosservice call /global_localization "{}"

On typing rosservice info /global_localization, you can observe Type: std_srvs/Empty

So you may do service call like rosservice call /global_localization "{}"

OR

Programatically you may use it like

ros::NodeHandle nh;
ros::ServiceClient client =nh.serviceClient<std_srvs::empty>("/global_localization");
std_srvs::Empty srv;
client.call(srv);