2D Pose estimate

edit

Hello All,

Using amcl as described in Ros By Example volume 1, section 8.5.2, I am confused. There are 2 maps in Rviz, one using topic /map, and showing the map I use, and one called Inflated Obstacles using topic /move_base/local_costmap/costmap. And it shows the inflated map include inflated data from the laser. Initially both maps are overlapping.

But if I do a "2D Pose Estimate", the inflated map moves with the setting of the pose. So if I only turn the robot 90 degrees, the inflated map also turns 90 degrees with respect to the other map. I can see that the laser data now is correct with respect to the robot, but not with respect to the inflated map. And navigation does not work.

I am confused, the only difference with the setup in the book is our own simple controller that does dead reckoning for odometry. And it works perfectly with move_base.

EDIT:

Initially both the global map and the (inflated) local (incl. laser) map are overlapping, as it should be. The robot is at some position. When setting the pose correctly, the laser is set to align with the global map. The inflated map now is completely wrong because it moved with the robot.

For example a wall in the local map now is standing in the middle of the room in the global map.

I would assume the because of the laser data the local map will be updated, but it isn't. And navigation through that part of the room is not possible. On a side note: If I stand in front of the laser for a moment, the obstable is often not disappearing altogether. Most of the time a remnant wil stay in the local map and can block the path.

Here some screenshots of rviz.

First the initial situation, then after setting the correct pose. The last one is while trying a goal in the "top" of the room, where you can see that it gets stuck because of the local costmap that is (incorrectly I think) in the way.

Finally note that the laser does not has a complete free view, it cannot see to the back of the robot. The front of the robot is the black dot, which actually is the laser. Hopefully this helps