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The remap command is only used to "rename" parameters that are already loaded to the parameter server. In your case, you want to load new data to the parameter server, so you'll need to do something different.

There are multiple ways to load URDF data from a file to the parameter server:

1) Use <param> with the command attribute, as shown in this URDF tutorial:

<launch>
    <param name="robot_description" command="cat $(find museumGuide)/urdf_model/peoplebot.xml" />
    <node name="robot_state_publisher" pkg="robot_state_publisher" type="state_publisher" />
</launch>

2) Use <param> with the <textfile> argument as shown here:

  <param name="robot_description" textfile="$(find museumGuide)/urdf_model/peoplebot.xml"/>

I think it is generally preferred to use option #2. That's also the method that is used for packages generated by the internal ROS wizards for Arm Navigation and MoveIt.

The remap command is only used to "rename" parameters that are already loaded to the parameter server. In your case, you want to load new data to the parameter server, so you'll need to do something different.

There are multiple ways to load URDF data from a file to the parameter server:

1) Use <param> with the command attribute, as shown in this URDF tutorial:

<launch>
    <param name="robot_description" command="cat $(find museumGuide)/urdf_model/peoplebot.xml" />
    <node name="robot_state_publisher" pkg="robot_state_publisher" type="state_publisher" />
</launch>

2) Use <param> with the <textfile> argument as shown here:

  <param name="robot_description" textfile="$(find museumGuide)/urdf_model/peoplebot.xml"/>

I think it is generally preferred to use option #2. That's also the method that is used for packages generated by the internal ROS wizards for Arm Navigation and MoveIt.

  <param name="robot_description" command="$(find xacro)/xacro '$(find mypackage)/path/to/robot.xacro'" />