projecting the map in rviz using map_server
I want to use map_server as in this link: wiki.ros.org/map_server I built my map using mapper3 (basic) the map should be projected in Rviz grid and should occupy it all, the centre of the map using...
View ArticleMap_server fails to publish transform
Map server node fails to publish transform when i execute the below launch file. All other nodes are functioning properly. Below is my rviz results where the map's corner is oriented with the origin of...
View ArticleTrying to understand gmapping and playback some bag
Hi all, I have a bag with scanner data. I am not trying to build a map. THe scanner is in /scan. So I ran rosparam set use_sim_time true roscore rosrun gmapping slam_gmapping scan rosrun tf...
View Articleopenslam_gmapping or slam_gmapping?
Hi, I am a beginner with ROS, i successfully installed ROS indigo on my Ubuntu laptop and now i want to install a slam solution to test with my robot. I was searching for gmapping and found out that...
View ArticleImplementing GMapping with Two Lidars
So, I am attempting to autonomously navigate a Clearpath Robotics' Husky using GMapping. The Husky is currently equipped with two Sick LMS151 lidars, one centered on both the left and right side....
View Articlehow to do slam with a custom robot in Gazebo?
Hi everyone, I'm trying to build a map using SLAM(gmapping) and my own (virtual) robot which is equipped with a hokuyo LRF under Gazebo, i have looked around but could not find a tutorial on how to do...
View Articlehow to set tf for gmapping
Hi everyone, I am trying to build a map using gmapping with my robot in Gazebo,and I faced a problem about setting up the right tf so the gmapping can do the right job. Now I am able to load the urdf...
View ArticleDoes gmapping uses graph optimization?
The output map of Gmapping are usually consistence, even-though its trajectory output jumps a lot. Therefore, I have checked Gmapping tree node trajectory. Which surprisingly, tree node linearized all...
View ArticleDoes gmapping resize the map if required?
I'm using gmapping. The default map-size is a 4000x4000 cells (200m x 200m) occupancy grid map stored in a 1x16,000,000 1D array. What happens if I make the default map-size a 200x200 cells map (10m x...
View Articlegmapping algorithm
hi all, I would like to know the algorithms used in gmapping and depthimage_to_laserscan.someoone please help.
View ArticleRobot Position in slam_gmapping in python
I am relatively new to ROS. I am trying to move a turtlebot around using slam_gmapping in python. I can get the occupancy grid just fine, using a dynamic_map client via rospy. However, I cannot for the...
View ArticleFinding robot's position within slam_gmapping map in python
I am relatively new to ROS. I am trying to move a turtlebot around using slam_gmapping in python. I can get the occupancy grid just fine, using a dynamic_map client via rospy. However, I cannot for the...
View ArticleWhy gmapping package requires the base_link -> odom tf?
in the [http://wiki.ros.org/gmapping](http://wiki.ros.org/gmapping) 4.1.5 Required tf Transforms 1 the frame attached to incoming scans → base_link usually a fixed value, broadcast periodically by a...
View Articlegmapping bag rviz problem
Hi, I am following the [gmapping tutorial](http://wiki.ros.org/slam_gmapping/Tutorials/MappingFromLoggedData) But rviz can not draw the map out: I've add the MAP display,but with the error "No...
View ArticleHow to use quadrature encoder and accelerometer data in ROS (Robot Operating...
Hi everyone, I'm working on a project to build the map of the floor autonomously. To be clear, I am really new at this ROS and SLAM algorithms. I just have a working robot base which uses encoders,...
View ArticleGetting coordinates through comparing .pgm files using opencv
1 - Generated the .pgm files through gmapping using LIDAR data. -- One with partial map -- One with map of the whole area Trying to: 2 - Use opencv to compare the maps 3 - To get the coordinates of the...
View Articlelimitations of neato xv11 lidar vs rplidar and recommendations for buying a...
Hello All, I am a new ros user. After experimenting with some ir sensors, ultrasonic distance and discovering inherent limitations I decided to purchase a xv11 lidar from ebay. My intention is just to...
View ArticleXTIon with hector slam
Hi all, I've been experimenting with hector_slam and to a lesser extent gmapping and laser scan matcher (The reason for the lesser extent is that the scan matcher isn't playing ball at the moment - a...
View ArticleHow to use GetMap-Service by gmapping
I'm using gmapping to create a map. To this point everything works fine. Now I want to call the GetMap-Service to receive the map for further investigation: #include ros::ServiceClient client =...
View ArticleScan message must contain angles from -x to x
I follow the tutorial [turtlebot_simulator](http://wiki.ros.org/turtlebot_simulator/Tutorials/hydro/Make%20a%20map%20and%20navigate%20with%20it) to make a map in a simulated world.But when I run >...
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