GPS points are not shown in mapviz

[Masoumehrahimi]

hi
how is it possible to just by running mapviz and bag file, the gps points will show in mapviz?!
Would you please mention the complete procedure.
because I have run the bag file, and did all the setting related to the mapviz, but in mapviz, i cannot be able to see the gps points which are saved in my points_outdoor.txt !?!
thanks

[Masoumehrahimi]

why I cannot tag gps waypoints on the mapviz, the same as you? what did you do?

the type of my message is:
rostopic info /gps/fix
Type: sensor_msgs/NavSatFix