How to modify slam start location?

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Thanks for your response :) What I am thinking is maybe I have already know the location where to start and I want the map's pose start from just the place lidar is but not start from ( 0 , 0 ).

you can go to your amcl.launch file to set:

<param name="initial_pose_x"            value="$(arg initial_pose_x)"/>
<param name="initial_pose_y"            value="$(arg initial_pose_y)"/>
<param name="initial_pose_a"            value="$(arg initial_pose_a)"/>

I know how to modify AMCL :) My question is about SLAM.

I think you still missed the concept of them. it is strange that you feed pose parameters into slam's initial pose, because where slam start is map start. You cannot designate its place while it is making map.

Hi asimay_y :) I have already solve my question. I can publish data to "initalpose" topice to change it.

I know how to use SLAM and AMCL in different situation. really thanks for your response.