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2017-05-29 13:45:46 -0500 commented question Unconnected nodes: Hector_Slam and Navigation

You're right. Hector is built to work without consuming odometry. But it is able to produce odometry data. It is not des

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2017-05-28 06:42:39 -0500 commented question Unconnected nodes: Hector_Slam and Navigation

When remapping the topic to '/odom' the navigation stack tells that 'odom' is found. That's great. But when I'm sending

2017-05-28 05:11:34 -0500 commented question Unconnected nodes: Hector_Slam and Navigation

I think you're probably right. hector_mapping delivers 'scanmatch_odom' topic, the navigation stack consumes 'odom' topi

2017-05-25 15:07:36 -0500 commented question Unconnected nodes: Hector_Slam and Navigation

Hi again, I am sorry for the delayed answer. My robot provides odom published by the hector_slam. After your hint I too

2017-05-25 15:02:49 -0500 commented question Unconnected nodes: Hector_Slam and Navigation

Hi again, I am sorry for the delayed answer. My robot has a odom published by the hector_slam. I was interested and too

2017-05-21 12:47:38 -0500 commented question Unconnected nodes: Hector_Slam and Navigation

Hi Humpelstilzchen, thank you for your comment. 1) Sending goals is okay. But a navigation path is not calculated. 2)

2017-05-21 06:58:06 -0500 asked a question Unconnected nodes: Hector_Slam and Navigation

Unconnected nodes: Hector_Slam and Navigation I try to get the hector_slam (github.com/tu-darmstadt-ros-pkg/hector_slam.

2017-04-11 00:16:22 -0500 commented answer Errors on catkin_make

It seems like the package ros_markers does not provide the 'rosdep keys'. So rosdep can't resolve the dependencies for this package. Plz take a look at the rosdep command reference http://docs.ros.org/independent/api/r... . You could try to exclude the package from rosdep.

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2017-04-07 15:59:03 -0500 answered a question Errors on catkin_make

Hi there,

did you try to resolve your dependencies? The command

rosdep install --from-paths ~/your-workspace/src --ignore-src

will try to resolve the dependencies of your packages. Then try again with

catkin_make

I hope that it will work for you.

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2016-11-28 15:25:20 -0500 asked a question Navigating with the navigation stack and hector_slam without an IMU

Hello,

I am currently using hector_slam having no IMU installed.

I want to use the navigation stack. In combination with the hector_slam (hector_mapping) the robot shall navigate and move transport itself autonomously.

I am interested in two problems (and their solutions)

  1. General question: My robot has no IMU installed and therefore does not publish any odometry information. Are odometry information required for the robot? Since hector_slam provides poses and tf's does a robot need additional odometry information provided by a physical IMU? If yes, why does it need them?
  2. The navigation stack is well documented. In the rosgraph architecture for the navigation stack you see that odometry information is required. Do I need a physical IMU installed on my robot? Does hector_slam provide 'emulated, software-based' odometry? Using the hector_slams' published topics poseupdate or slam_out_pose and the transform can I 'calculate' my odometry and publish it? If yes, how would I do that?

I checked the ROS answers and yielded diverging anwers concerning this issue.

The question http://answers.ros.org/question/20445... is answered with 'you need odometry' to use the navigation stack.

The question http://answers.ros.org/question/73261... is answered with 'you can just forget about your robot's odometry, because hector_slam will provide it'

ROS version: kinetic OS: Ubuntu 16.04