Local and Global map topics

asked 2017-12-26 05:12:08 -0500

sisko gravatar image

updated 2017-12-26 10:50:38 -0500

The tutorial said to select /map from the dropdown list but that option does not exist in either case.

Only the default values of /move_base/DWAPlannerROS/local_plan and /move_base/DWAPlannerROS/global_plan are available.

I proceed by manually inputting /map as the topic but then I get the following status error within RVIZ:

3381f2d731d4076ec5c71b0759edbe4e
Error subscribing: Tried to subscribe to a topic with the same name but different md5sum as a topic that was already subscribed [nav_msgs/Path/6227e2b7e9cce15051f669a5e197bbf7 vs. nav_msgs/OccupancyGrid/3381f2d731d4076ec5c71b0759edbe4e]

I have however confirmed there is a /map topic via rostopic list.

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Comments

What tutorial are you referring to? You're getting that error because the node that's subscribed to /map is expecting a different message type than what you're publishing.

jayess gravatar image jayess  ( 2017-12-26 10:46:58 -0500 )edit

@jayess: I added a link to the tutorial

sisko gravatar image sisko  ( 2017-12-26 10:51:16 -0500 )edit

What part of the tutorial are you at? Are you publishing a map on the /map topic?

jayess gravatar image jayess  ( 2017-12-26 10:57:21 -0500 )edit

I have got as far as step#9 but my map is of such low quality I created this post looking for help.

sisko gravatar image sisko  ( 2017-12-26 12:21:43 -0500 )edit
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