fast_lio2_SC/launch/mapping_large_velodyne.launch

<launch>
  <!-- Launch file for velodyne16 VLP-16 LiDAR -->

    <arg name="rviz" default="true" />

    <rosparam command="load" file="$(find fast_lio_sam)/config/large_velodyne.yaml" />

    <param name="feature_extract_enable" type="bool" value="0"/>
    <param name="point_filter_num" type="int" value="4"/>
    <param name="max_iteration" type="int" value="3" />
  <!--	单帧内，畸变纠正后降采样的分辨率-->
    <param name="filter_size_surf" type="double" value="0.5" />
    <param name="filter_size_map" type="double" value="0.5" />
    <param name="cube_side_length" type="double" value="1000" />
    <param name="runtime_pos_log_enable" type="bool" value="0" />
    <node pkg="fast_lio_sam" type="fastlio_sam_mapping" name="laserMapping" output="screen" /> 

    <group if="$(arg rviz)">
    <node launch-prefix="nice" pkg="rviz" type="rviz" name="rviz" args="-d $(find fast_lio_sam)/rviz_cfg/loam_livox.rviz" />
    </group>

</launch>