Octomap not generated

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Santosh T

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Nov 1, 2020, 5:03:49 AM11/1/20
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Hi every one, 

I am kinda new to 3d mapping and started using the octomapping_server package.
I am using a urdf with kinect plugin and trying to generate an octomap of the gazebo world.
When I make the necessary changes and run the  launch file, the following warning is being generated and no map is generated.
I am attaching my launch file .
Warnings:
[ WARN] [1604224040.682252307, 670.359000000]: Nothing to publish, octree is empty
 and other warnings relating to message filter

Launch file:

<launch>
<node pkg="octomap_server" type="octomap_server_node" name="octomap_server" output="screen">
<param name="resolution" value="0.1" />
<!-- fixed map frame (set to 'map' if SLAM or localization running!) -->
<param name="frame_id" type="string" value="odom" />
<param name="latch" value="true" />
<!-- maximum range to integrate (speedup!) -->
<param name="sensor_model/max_range" value="50" />
<param name="pointcloud_max_z" value="0" />
    <param name="pointcloud_min_z" value="100" />
<!-- data source to integrate (PointCloud2) -->
<remap from="cloud_in" to="/kinect/depth/points" />

                
             
</node>
</launch>

Please help me figure this out.

Thankx
Santosh
rqt_graph
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