# Launch file

https://www.clearpathrobotics.com/assets/guides/melodic/ros/Launch%20Files.html
https://ithelp.ithome.com.tw/articles/10241439

[Lua file of cartographer ros](https://www.ncnynl.com/archives/201810/2780.html)
## Launch file

<node ns="rp1" name="lidar1"          pkg="rplidar_ros"  type="rplidarNode" output="screen">

Output ="screen" be like a lot of information
Output ="log" be like few information
## URDF file