Automatic generation of map of a world

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I'm new to ros and I`m working on turtlebot to understand things clearly. I know we can use the gmapping module with a keyboard/joystick as operator but let's say I have lot of maps and I do not want to traverse all of them manually.

One way of solving this would be to generate random points within the world and let the robot traverse from one point to another. If we use enough number of points our robot should be able to create a map of the whole world. But, I`m not able to implement this idea.

Can anyone help me in implementing the above solution...?

Also interested to know any other method which can solve this problem.