draw the path with hector slam

edit

To get the trajectory, you have to initialize hector_trajectory_server node.To do this you can directly call "geotiff_mapper.launch" file in "hector_geotiff" package. After launching this node, to visualize the path in rviz add "Path" and select topic as /trajectory.

Edit:

Working Launch files

hector_hokuyo.launch

    <launch>
  <param name="pub_map_odom_transform" value="true"/> 
  <param name="map_frame" value="map"/> 
  <param name="base_frame" value="base_frame"/> 
  <param name="odom_frame" value="odom"/>

  <node pkg="hokuyo_node" type="hokuyo_node" name="hokuyo_node"/>
  <node pkg="tf" type="static_transform_publisher" name="map_2_odom" args="0 0 0 0 0 0 /map /odom 100"/>
  <node pkg="tf" type="static_transform_publisher" name="odom_2_base_footprint" args="0 0 0 0 0 0 /odom /base_footprint 100"/>
  <node pkg="tf" type="static_transform_publisher" name="base_footprint_2_base_link" args="0 0 0 0 0 0 /base_footprint /base_link 100"/> 
  <node pkg="tf" type="static_transform_publisher" name="base_link_2_base_stabilized_link" args="0 0 0 0 0 0 /base_link /base_stabilized 100"/> 
  <node pkg="tf" type="static_transform_publisher" name="base_stablized_2_base_frame" args="0 0 0 0 0 0 /base_stabilized /base_frame 100"/> 
  <node pkg="tf" type="static_transform_publisher" name="base_frame_2_laser_link" args="0 0 0 0 0 0 /base_frame /laser 100"/> 
  <node pkg="tf" type="static_transform_publisher" name="base_2_nav_link" args="0 0 0 0 0 0 /base_frame /nav 100"/>

  <node pkg="rviz" type="rviz" name="rviz" args="-d <path_to_folder>/rviz_cfg.rviz"/>

  <include file="<path_to_folder>/default_mapping.launch"/> 
  <include file="<path_to_folder>/geotiff_mapper.launch"/>

</launch>

default_mapping.launch

<launch>
  <arg name="tf_map_scanmatch_transform_frame_name" default="scanmatcher_frame"/>
  <arg name="base_frame" default="base_frame"/>
  <arg name="odom_frame" default="base_frame"/>
  <arg name="pub_map_odom_transform" default="true"/>
  <arg name="scan_subscriber_queue_size" default="5"/>
  <arg name="scan_topic" default="scan"/>
  <arg name="map_size" default="2048"/>

  <node pkg="hector_mapping" type="hector_mapping" name="hector_mapping" output="screen">

    <!-- Frame names -->
    <param name="map_frame" value="map" />
    <param name="base_frame" value="$(arg base_frame)" />
    <param name="odom_frame" value="$(arg odom_frame)" />

    <!-- Tf use -->
    <param name="use_tf_scan_transformation" value="true"/>
    <param name="use_tf_pose_start_estimate" value="false"/>
    <param name="pub_map_odom_transform" value="$(arg pub_map_odom_transform)"/>

    <!-- Map size / start point -->
    <param name="map_resolution" value="0.050"/>
    <param name="map_size" value="$(arg map_size)"/>
    <param name="map_start_x" value="0.5"/>
    <param name="map_start_y" value="0.5" />
    <param name="map_multi_res_levels" value="2" />

    <!-- Map update parameters -->
    <param name="update_factor_free" value="0.4"/>
    <param name="update_factor_occupied" value="0.9" />    
    <param name="map_update_distance_thresh" value="0.4"/>
    <param name="map_update_angle_thresh" value="0.06" />
    <param name="laser_z_min_value" value = "-1.0" />
    <param name="laser_z_max_value" value = "1.0" />

    <!-- Advertising config --> 
    <param name="advertise_map_service" value="true"/>

    <param name="scan_subscriber_queue_size" value="$(arg scan_subscriber_queue_size)"/>
    <param name="scan_topic" value="$(arg scan_topic)"/>

    <!-- Debug parameters -->
    <!--
      <param name="output_timing" value="false"/>
      <param name="pub_drawings" value="true"/>
      <param name="pub_debug_output" value="true"/>
    -->
    <param name="tf_map_scanmatch_transform_frame_name" value="$(arg tf_map_scanmatch_transform_frame_name)" />
  </node>

  <!--<node pkg="tf" type="static_transform_publisher" name="map_nav_broadcaster" args="0 0 0 0 0 0 map nav 100"/>-->
</launch>

geotiff_mapper.launch

<launch>
  <arg name="trajectory_source_frame_name" default="/scanmatcher_frame"/>
  <arg name="trajectory_update_rate" default="4"/>
  <arg name="trajectory_publish_rate" default="0.25"/>
  <arg name="map_file_path" default="$(find hector_geotiff)/maps"/>
  <arg name="map_file_base_name" default="hector_slam_map"/>

  <node pkg="hector_trajectory_server" type="hector_trajectory_server" name="hector_trajectory_server" output="screen">
    <param name="target_frame_name" type="string" value="/map" />
    <param name="source_frame_name" type="string" value="$(arg trajectory_source_frame_name)" />
    <param name="trajectory_update_rate" type="double" value="$(arg trajectory_update_rate)" />
    <param name="trajectory_publish_rate" type ...