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the necessary of the "rosparam set use_sim_time true " in gmapping

hello, I would like to know the necessary of "rosparam set use_sim_time true " when I build exact map by using gmapping and rviz. When I used "rosparam set use_sim_time true " before "rosrun gmapping...

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Issue while creating a Map using gmapping?

Hello I am in confusion, what really the issue is in? Please any one can solved it, we urgently needed to solve it. In my mobile base Robot , we are now at the stage of creating a map using gmapping,...

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The real turtlebo pose in gmapping

Hi, I'm a beginner in ROS and learn the gmapping package now. I would like to visualize the real robot pose and the estimated robot pose in RVIZ. Now when I run gmapping and teleop to move the robot...

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ways to autonomous localization of turtlebot

Hello guys, i am working on turtlebot with ROS Indigo 14.04. I have created a map of an environment using gmapping and the maps turned out to be great. I am using this map for autonomous navigation and...

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Is there a Turtlebot package software for iRobot Roomba 600 series base?

Hi!! I'm trying to make my own Turtlebot using a Roomba 645 base, a Kinect sensor and ROS Indigo. I would like to use this platform to make maps (SLAM) using Gmapping package for example. I've trying...

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My robot position get changes automatically

Hi, I an facing one issue in ROS , Now I am at the stage of creating a map , firstly my odometry data is been correct , TF( Transform ) data between all frames is correct and the Laserscan is giving...

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Z-coordinate has to be 1 or -1

Hello, I'm starting to build a map using gmapping, but whenever I start slam_gmapping, the following warning is shown: Laser has to be mounted planar! Z-coordinate has to be 1 or -1, but gave: 0.00000...

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Alternative approach to gmapping and hector-mapping?

Hi there, i'm new to this forum and hope to ask my question the right way. I started to work with ROS. To get used to it i tested some SLAM algorithm to get a occupancy grid map. The first one was...

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How to use depthimage_to_laserscan package to create map?

I am running rosrun depthimage_to_laserscan depthimage_to_laserscan and the scan topic is published and when I rosbag record -o /scan /tf the scan topic is not been recorded and the map is not...

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Gmapping and tf

Hi all My robot in rviz has some problems when i run gmapping launch file. the robot model and it's wheel got to take apart. How can i fix it. Sorry for my bad english. Thanks first. Here is the image...

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How do I use a map to reduce odometry errors?

So, I have a *.pgm and *.yaml map and I want to use it, somehow, to reduce the odometry errors. I need to get accurate locations to set point on a map and someone recomended this to me. However I...

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error when gmaping

**I met error when i use gmaping:** in rviz , i see the simulated position is 1/2 of the reality, when i was using `gmapping` + `laser_scaner` to build the map. when I echo the topic `/odom` , it shows...

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how to configure gmapping params to make the map denser?

I'm using the `gmapping/slam_gmapping` node to create the map using `ros_arduino_bridge` and `neato_laser_driver` with which the `/odom , /scan, and /tf` can be published. I referred the parameter...

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How to create 2Dmap with p3dx with rosbag?

I recorded the data in rosbag file of /tf and /scan topics and when i run the gmapping and playback the recorded data from rosbag file nothing changes. And the error is 100% messages dropped.Do i have...

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Turtlebot Gmapping with RPLIDAR encounters errors

Hi, i know there were serveral questions about this error, but they are all about the kinect connected to the turtlebot.. I have a RPLIDAR A1 connected to the turtlebot and want to run gmapping slam...

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gmapping and frontier exploration acting weird

I am trying to use frontier exploration package to solve a coverage path planning problem. The robot needs to search for a a target in an empty space. Namely, There are no landmarks except the target...

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Problem in Map buildiing using Gmapping

I have created a bag file using the attached code of bagconvert.py, The code is pasted, #!/usr/bin/env python import rospy import rosbag from sensor_msgs.msg import LaserScan from math import pi from...

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Closed Loop Detection gmapping & Hector SLAM

All, Found this [answer](http://answers.ros.org/question/199781/how-does-gmapping-detect-loop-closure/) how do I check Neff to see if a loop closure has been found/detected. Thanks Mark

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Localizing and mapping with only tf,GPS, and scan

I need to do localizing and mapping in an environment. I don't want to use gmapping since GPS and IMU on the robot can already give a very accurate pose estimation. My question can be divided into two...

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tf tree details

After running gmapping from intel.bag, while generating the map, if I run rosrun tf view_frames, it gives me the frames.pdf. In this case, the transform is map->odom->base_link and...

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