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Disable global costmap

asked 2017-05-13 10:10:55 -0500

peterwe gravatar image

updated 2017-05-26 02:47:46 -0500

Hey everyone,

I am currently building a robot with its own global planner plugin. This means that the global planner does not need the global costmap any more, instead it takes a graph (based on a map) provided by a different node.

Now, I want the navigation stack to avoid building the global costmap because that would just waste computation power and time but I still need the map for localization purposes and to be shown in rviz for visualization and setting the start- and goal positions.

When I put this

<node name="map_server" pkg="map_server" type="map_server" args="$(arg map_file)" />

in my launch file, it will probably automatically produce my costmap, right? Or does it produce the costmap only when I plan my path on it?

Does this question with the answer of David Lu do what I want? He proposes to put this in the global_costmap.yaml to disable the obstacle avoidance:

plugins:
    - {name: static_layer, type: 'costmap_2d::StaticLayer'}

I don't know if that is the right approach.

Edit:

My global_costmap_params.yaml file:

global_costmap:
  global_frame: /map
  robot_base_link: base_link
  update_frequency: 1.0
  publish_frequency: 0.5
  static_map: true
  rolling_window: false
  map_type: costmap
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answered 2017-05-24 10:39:17 -0500

Procópio gravatar image

The costmap is not automatically produced by the publication of a map, but rather by the configuration of your global_costmap.

What David Lu suggests in the linked answer is to use only a static layer (coming from the published map) which would create a costmap from the publish map, which is not what you want.

I have never done this before so I do not know how it would behave, but you could try edit your global_costmap.yaml to have a minimal config, without any layer, for example:

global_costmap:
  map_type: costmap
  global_frame    : map
  robot_base_frame: base_footprint

Again, I am not sure what the result will be, mostly because it depends on how your global planner plugin interacts with the global costmap.

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Comments

As of kinetic without a plugin configuration a pre-hydro style costmap is configured.

Humpelstilzchen gravatar imageHumpelstilzchen ( 2017-05-24 12:56:20 -0500 )edit

@Procópio : Thank you for your answer! In fact, I'm already using the minimal config you proposed and @Humpelstilzchen is right: a costmap is created with the minimal config I use (I've added my global_costmap_params.yaml file to my post).

peterwe gravatar imagepeterwe ( 2017-05-26 02:44:46 -0500 )edit

My global planner does not need the global costmap at all. I just need the static map in the beginning to set my start and goal locations in rviz. And of course to make amcl work properly.

peterwe gravatar imagepeterwe ( 2017-05-26 02:56:45 -0500 )edit
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answered 2019-07-11 22:12:53 -0500

I'm just posting the solution I found here.

I disable the costmap scanning in the costmap_common_params.yaml. Set the value of marking to false or turn down the obstacle_range to value you want.

front_scan: {data_type: LaserScan, topic: movo/front_scan, marking: false, clearing: true, inf_is_valid: true, obstacle_range: 4.75, raytrace_range: 8.0}
rear_scan: {data_type: LaserScan, topic: movo/rear_scan, marking: false, clearing: true, inf_is_valid: true, obstacle_range: 4.75, raytrace_range: 8.0}
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Asked: 2017-05-13 10:10:55 -0500

Seen: 430 times

Last updated: May 26 '17