Run slam without robot

Question

Hi I want to run slam as robot but I don't have any robot now. I just only have lidar sensor. So I want to make a virtual map and run slam in a virtual map by moving virtual robot like this.

https://www.youtube.com/watch?v=lajIPkA86oQ

And I want to visualize point cloud data in rviz. My point cloud data is like this. Can I visualize these point cloud data in rviz? or Can I create bag file by these point cloud data?

17.187 0.017 0.790 0.00
17.180 0.071 0.790 0.00
17.176 0.125 0.790 0.00
17.180 0.179 0.790 0.00
17.091 0.232 0.787 0.11
16.021 0.291 0.751 0.21
16.026 0.341 0.751 0.68

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Originally posted by [email protected] on ROS Answers with karma: 3 on 2018-07-25

Post score: 0

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Original comments

Comment by Jari on 2018-10-02:
Can you clarify the format of the file? What does each column represent?

If your file has:

1. the ranges or x/y coordinates of the scan from your lidar in the sensor's frame
2. a time stamp for each reading (I suppose that's not "technically" a requirement)
3. some odometry estimate ...

Comment by Jari on 2018-10-02:
the you can just write anode that reads the file and publishes things to the correct topics (e.g. /scan, /odom, /tf, etc)

Answer 1

HI,

you can visualize Point cloud data in rviz. For this you just need to add right display. Please check this manual. For storing bag file please check this tutorial.

For crating a map see these tutorials.

P.S. Next time when you want to ask a question try to search for it first. All this links were found in first 5 search results....

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Originally posted by destogl with karma: 877 on 2018-07-25

This answer was ACCEPTED on the original site

Post score: 1

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Original comments

Comment by [email protected] on 2018-07-25:
I already searched all things that you comment, but I am noobs so I think I've got it all figured out. Turorial that you comment explain how to create bag file by turtlesim node, my question is how to create bag just using point cloud data that is already collected before, not using turtlesim node.

Comment by destogl on 2018-07-25:
you should just choose your topic you want to record like:

rosbag record -O subset /cmd_vel

Where you intead of cmd_vel write name of your topic.