Poor quality maps produced from odometry based slam algorithms tested in real...
We are currently testing several slam algorithms in a real TurtleBot(ROS Kinetic). Despite the fact that everything seems to be working fine on TurtleBot we have come across a problem on the maps...
View ArticleHow to build a map from a recording with gmapping
I followed [this tutorial](http://wiki.ros.org/cn/slam_gmapping/Tutorials/MappingFromLoggedData) with the rosbag provided in the tutorial. Here is the map it produces: ![image...
View ArticleMap rotation in rviz during gmapping
Hello guys, I am running the gmapping algorithm with the required transforms and the scan and odom topics using rplidar. While i am able to get the map, whenever i turn the map also turns in rviz...
View ArticleUse Gmapping without a laser
I'm using ROS Melodic, Gazebo 9.7.0 on an Ubuntu 18.04.2 LTS. I have to make a map with odometry only. I'm going to teleop the robot to move it around a closed room to make the map. After I have the...
View ArticleClient [/mir_auto_bagger] wants topic /move_base/goal to have datatype/md5sum
When I try to do a gmapping with my mobile robot an error pop-up:> [ERROR] [1554797108.240628800]: Client> [/mir_auto_bagger] wants topic> /move_base/goal to have> datatype/md5sum>...
View ArticleHow I make my map don't move?
Hi, I have a modified [workspace](https://github.com/husarion/rosbot_description) I got on github with some packages to do gmapping and amcl with a urdf robot. Well it's all fine until I run amcl and I...
View ArticleImprove gmapping results
Hey everyone I am working with the ROS Navigation stack using a simulated environment in Stage. Initially I would have created a topic criticizing the precision of the AMCL localization stack, but...
View ArticleImprove map created by Gmapping
Hi All, I implemented Gmapping algorithm for a featureless tunnel/pipe environment. Since LiDar/camera are not that effective in these environments, stable odometry is the prime data that can be used...
View ArticleVisual SLAM instead of odometry in Gmapping
Gmapping of ROS Navigation uses /odom data for mapping and performing navigation. I wish to replace the /odom data by a visual SLAM. What are the changes I need to make.
View ArticleTuning Gmapping Parameters or Alternative SLAM Algorithm
We built our own robotic platform with a home made LIDAR which is composed of four Time of Flight Sensors to get range information of the environment. For odometry information we are using optical...
View ArticleUpdate map for dynamic objects with External camera
Hello everyone.. I'm new to ROS and i like to know that is there any way to update a gmaping generated 2D map for dynamic objects detected with a external camera ? Please can anyone give your idea on...
View Articlehow to gmapping with lidar a1
I am new to ROS i am working on navigation project so i need to map my environment using Lidar sensor i am able to get laser view by just runing default lidar launch file but i dont know how to get...
View ArticleFollow gmapping tutorial and map creation stuck at the first scan frame
So I followed the tutorial [here](http://wiki.ros.org/cn/slam_gmapping/Tutorials/MappingFromLoggedData#download), and the bag file is also from this tutorial:...
View ArticleCreating map with paint(or any other image editor)
Hello, I am following this one tutorial with turtlebot and creating a map by keyboard teleoperation has been very tough for me as the maps were getting messed up and tangled. I am wondering if it is...
View ArticleNo matching device found for gmapping
Hello everybody! my name is Antonino and I work as a teacher in a Secondary School in Spain and I want to teach to my students how to use ROS. [my students using...
View ArticleConverting ultrasound range to a Laser Scan
In my end of studies project, I have to make a robot that should do mapping and localization using only ultrasounds sensor. So for doing this i should convert sensor_msgs/LaserScan message to...
View Articlegmapping doesn't take /tf as ground truth while building the map?
Hello, I am using gmapping to build laser scan map here, while I found out that the communication between /slam_gmapping and /tf is bilateral:  Test...
View ArticleComparing G-mapping/Carto SLAM with ground truth map
Hi All, I wanted to compare my map generated by G-mapping or Cartographer with ground truth. I was thinking to compare the map generated by passing odometry data by the sensors to the ground truth...
View Articleis it possible to add to the gmapping-generated map obstacles using GPS...
i have an device that provides me GPS cordinates of ather boats, so i want to add them as obstacles in the gmapping map .
View ArticleLooking for a Beginners Guide to Navigation Stack and SLAM with Gazebo
As an undergrad working on SLAM algorithms, I'm looking for a step-by-step introduction to ROS navigation stack and gazebo. I am thinking of creating a simple box with a horizontal LiDAR array...
View Articlegmapping issues with laser pose
I'm working on creating a server map using the tutorial: http://wiki.ros.org/slam_gmapping/Tutorials/MappingFromLoggedData The odometry data is being published, and I have a hokuyo utm-30lx laser...
View ArticleBad maps produced by gmapping in simulation with feature-poor environments
I've found that in relatively feature-poor environments, e.g. a large rectangular room, the maps produced by gmapping can be very wrong. This is using a Turtlebot simulated in Gazebo, I'm not sure how...
View ArticleAMCL Tuning Suggestions?
Hi everyone, I am trying to implement AMCL on a rosbag. The map used is generated from the same bag. I haven't used AMCL a lot and so I am unsure as to what parameters do what. It is appearing like my...
View ArticleBad maps produced when using a rotating Lidar by gmapping
Hi, I'm using a rotating LiDAR to map the given environment in gmapping. But due to the rotation of the laser scan, it is not able to produce an appropriate map of the environment. ![image...
View ArticleIs it possible to Pause and Resume SLAM
I've been working with GMapping and Cartographer recently on ROS Kinetic. I noticed with both SLAM algorithms the map can only be saved and loaded but never can it be paused or resumed. If I restart...
View ArticleCan Gmapping subscribe to an odometry data that is not determined from wheel...
Hello, For one of my projects, I am working with the realsense T265 camera which can perform visual odometry and the camera is mounted onto the turtlebot 3 from Robotis. From visual odometry of T265...
View ArticleWhy Hector-Slam works better than Gmapping with RPLiDAR?
Hi. I am working with a home-made differential robot that have a RPLiDAR sensor for SLAM. Initially it worked with Hector-Slam a i had quiet good results, but now i am trying to improve them with...
View ArticleSwitch Odometry and Lidar weights in Gmapping during simulation
Hi, I was wondering is it possible to switch the weights of the odometry and Lidar during the simulation? The idea is when the robot is moving in a long hallway, give more weight to odometry than the...
View ArticleGmapping with V-REP
Hello, I'm doing a course project whose goal is to build a SLAM simulation with ROS and V-REP. I'm new to ROS and V-REP and I'd like some help from you guys. Here is what I did: 1. I created a scene...
View Articleundo map update wrong.
Hello is there any way to undo the last slam_gmapping update if the update is wrong. So I would not have to do all the mapping from the start. thanks
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