How to keep the x, y and z in the rviz visualization

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Hello,

I am using ROS Indigo on Ubuntu 14.04LTS I am running a turtlebot simulation. I am following this tutorial http://learn.turtlebot.com/2015/02/01... The thing is that every time I on "Go to specific location using a map from a world created in gazebo, I have to change the x and y every time before running the code because the map changes. My question. Is there a way for uploading the map_file in the same location? So, once I use the "go_to_specific_location_on_map" it goes to the same location every time.