Questions tagged [nav-msgs]
The nav-msgs tag has no usage guidance.
41 questions
0
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1
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103
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nav2_util - no such file or directory tf2_geometry_msgs
Hello,
I have observed during building the Navigation2 from source on new PC (with ROS Galactic, Ubuntu 20.04) that the nav2_util package won't build correctly:
<...
- 1,583
0
votes
2
answers
125
views
How to get length of array if poses from nav_msgs/Path.msg
Does anyone know how to use the message type nav_msgs/Path.msg. according to the wiki it is an array of poses that are used to plan a path but it I'm unable to get the msg in array form. I need to ...
distro
0
votes
1
answer
499
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Problem including nav_msgs/msg/odometry
Hi everyone,
when using the message type nav_msgs/msg/odometry (https://docs.ros2.org/foxy/api/nav_msgs/msg/Odometry.html) I tried o include it using this piece of code:
...
s0nc
0
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1
answer
18
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compile error related to <nav_msgs::Path> publisher
I am trying to publish the path produced by my global_planner plugin (named my_global_planner) using a publisher named ...
- 314
0
votes
1
answer
11
views
How to close a path msg
Hi all,
I was working in a path generation tool and I want to ask a question to see if this is possible since I did not manage to find a confident answer for my question.
The problem is the following: ...
Weasfas
0
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1
answer
164
views
Header stamp: When is/should this be from?
Many messages in ROS include the header, which includes the timestamp.
What is best/expected practice for this?
Should the stamp be the time at which the message is sent or the time of the event it is ...
Dave Barnett
0
votes
1
answer
37
views
nav_msgs Path: is it possible to separate the visualized trajectories?
Hello,
I'm using the nav_msgs::Path message to visualize multiple trajectories.
With one path publisher!
I want to separate these trajectories, i mean, i don't want ...
akosodry
0
votes
1
answer
4
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Printing time values along with pose
I’m an absolute newbie and I got hold of someone’s simple program to navigate a robot by setting a goal position and including random obstacles. The python script uses ROS move_base and navigation ...
kkulkarn
0
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1
answer
58
views
Client [/rviz_15....] wants topic /odom to have datatype/md5sum [sensor_msgs/PointCloud/d8....], but our version has [nav_msgs/Odometry/cd
I’m getting this error:
The robot launch file starts and all appears good.
I start rviz then I get one Pose array dataset then this error
...
CharlieD
0
votes
1
answer
15
views
Path Message with Velocity?
I know I can create a custom message that includes a velocity with each pose, but I'm curious for input from other developers. Is there a reason it would be detrimental to carry a speed command in ...
rukie
0
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1
answer
151
views
Subscribing to nav_msgs::Path message
Hi everyone,
I am trying to subscribe to a message of type nav_msgs::Path. Following is the callback function:
...
kllysin
0
votes
1
answer
26
views
Visualization in RVIZ
Good day, I am new to ROS Answer and beginner of ROS.
Referred to the title above, this Image A below illustrates the desired goal I would like to achieve. It is done in LabVIEW and right now, I ...
KinWah
0
votes
1
answer
1
view
ROS Answers SE migration: publish a path
Hello,
I want to publish a path, but with this code I can publish only one point at a time:
geometry_msgs::Point msg;
What can I do to publish the path?
This page should work, but I don't know exactly ...
Chris_ROSuser
0
votes
1
answer
18
views
Values in nav_msgs/Odometry.msg corresponds to orientation
I am implementing the sampling algorithm (sample_motion_model_odometry) from Thrun's Probabilisitic Robotics book p. 136, which samples the current pose of a robot using odometry information.
I am ...
apples92
0
votes
1
answer
5
views
Robot doesn't explore when used with frontier_exploration, move_base and gmapping
Hello everyone,
I am currently working on a small project to automate the motion of a robot when implementing SLAM.
Facts:
1. The robot platform used is Pioneer_p3dx and sensor mounted on top is ...
Hammad Iftikhar
0
votes
1
answer
33
views
Getting 'rosgraph resource not found' when trying to get turtlebot local_plan?
Hi,
I'm trying to get the 'geometry_msgs/Poses' message from the '/move_base/DWAPlannerROS/local_plan' topic for the Kobuki ...
piraka9011
0
votes
2
answers
47
views
How to install packages from github
So, I know how to clone a repository from github, but that's all. I would like to install the common_msgs collection of packages onto my Raspberry Pi which is running debian jessie. How do I go about ...
Raisintoe
0
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1
answer
46
views
What does Velocity in nav_msgs/Odometry actually mean?
I am confused with this type of data. What does the twist.twist.linear.x and twist.twist.linear.y actually represent?
I have a robot that can move either forward or backward and can ofcourse turn. In ...
Joy16
0
votes
1
answer
7
views
best way to compare two pose estimates from different sources
Hi all,
I have a mobile robot with navigation_stack up and running. The robot is able to navigate properly from point A to point B. I am using encoders to get the ...
Naman
0
votes
1
answer
18
views
Message size of >=520 bytes result in inconsistent publish timing
Publishing a message of size 519 bytes at 100Hz results in this output for 'rostopic hz':
average rate: 99.997
min: 0.010s max: 0.010s std dev: 0.00006s window: 996
Increasing the message size by one ...
Kogut
0
votes
1
answer
9
views
How to publish MAXON Encoder in EPOS2 70/10 for building "nav_msgs/Odometry"
Hi, I'm learning ROS for graduating undergraduate course.
I am following this Tutorial ' http://wiki.ros.org/navigation/Tutorials/RobotSetup ' to make mobile robot.
I already made teleoperation ...
Ros_junior
0
votes
1
answer
222
views
twist message: angular velocity unit
Quick question, the nav_msgs: twist has angular component in x,y,z.
I view this as the velocity of rotation with respect to x-axis, y-axis, and z-axis. But what is the unit of such velocity. Degree/...
kuku123
0
votes
1
answer
10
views
Navigation of turtlebot (Moving 1m forward, 1m left)
I want to move my turtlebot 2 a fixed set of distances such as 1m forward, 1m right and etc accurately using odometry. This is the C++ code i have currently. However, it does not seem to be using the ...
dylankc
0
votes
1
answer
19
views
Move a certain distance, turn, then move (Odometry topic)
Currently, I am able to have my robot move forward for a certain distance, turn right by a certain degree, then move forward again. However, it is extremely inaccurate as highlighted in ahendrix's ...
dylankc
0
votes
1
answer
6
views
Combining Header and Pose to make Posestamped
Hi there,
I am trying to a node that publishes posestampted messages to a topic when a float is the value of 1.0 on a different topic.
Could any of you kind people help me with where I am going wrong? ...
MDXLukeBennett
0
votes
1
answer
31
views
moving a robot inside specific area
I have a pioneer robot and I want to move it in the lab and I want to keep it in a square area. So when ever it want to cross that area it cant. I dont want to send a zero velocity to it so it will ...
RSA_kustar
0
votes
1
answer
59
views
How to convert from geometry_msgs PoseWithCovariance to nav_msgs Odometry?
I am using package hector_slam to do mapping using Hokuyo laser on a ugv and I would like also to use package robot pose_ekf to get better position estimate from the wheels and laser.
I tried ...
Ahmed Shehata
0
votes
1
answer
10
views
nav_msgs::Path without the field "pose"?
Hi,
I m trying to compile a code but I cannot do that since I m getting the following error:
...
Andromeda
0
votes
1
answer
5
views
from nav_msgs::path to base_local_planner::Trajectory?
Hello everyone,
I am writing a plugin of BaseLocalPlanner and I want to set a path to my move_base.
My problem is that move_base::make_plan give me a nav_msgs::path and move_base use ...
- 73
0
votes
3
answers
61
views
Convert /tf to nav_msgs/Odometry
Hi,
I want to use robot_pose_ekf to receive data from a IMU and a visual odometry source. This last one only publishes a /tf between to frames and I want to get the geometry_msgs/PoseWithCovariance ...
TSC
0
votes
1
answer
5
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How to use .msg in source code as a variable?
I want to use nav_msg/GridCells.msg and OccupancyGrid in my package,How to use it in the source code. It is not a member of nav_msgs and it is only a .msg and I am unable find documentation for using ...
balakumar-s
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votes
1
answer
2
views
Get cone from occupancy grid
Hello everyone,
Is there any built in method to get the range data in a cone-format from a nav_msgs/OccupancyGrid message?
I am using the Octomap package with the ...
Josch
0
votes
1
answer
5
views
Getting Robot Orientation
I am trying to write a program to have a robot follow a square path. I have two primary functions, forwardCommand and turnCommand, for either going straight to a corner of the square or for turning to ...
pineconetree
0
votes
1
answer
5
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nav_msgs::Path’ has no member named ‘set_poses_size’?
I have a package that compiles successfully in diamondback. When I compile it in fuerte, it fails and indicates that "error: ‘nav_msgs::Path’ has no member named ‘set_poses_size’". What is ...
tony
0
votes
1
answer
2
views
Global Pose of Robot in Dynamic window approach
The pose from <nav_msgs::Odometry> is same as the pose from tf::Stamped<tf::Pose> ?
Are these similar. Can I use the pose from the /odom topic in a function which takes a parameter of type ...
Devasena Inupakutika
0
votes
1
answer
7
views
What to use with amcl to get the robot current Velocity, geometry_msgs or nav_msg/Odometry?
Im using amcl amd gmapping for localisation. So I just want to know the robot velocity when it is zero ( or very small value) and its position ( the distance) to some reference object in the map by ...
Astronaut
0
votes
1
answer
4
views
Better trajectory types in ROS
I was wondering if anyone has any experience regarding trajectory definition in ROS
with other types that nav_msgs/Path.
In particular, I would be interested in a way to:
a. stream trajectories,
b. ...
- 1,194
0
votes
2
answers
53
views
Merge two OccupancyGridMaps
Hi there,
as the topic says: I want to merge/combine two OccupancyGridMaps.
The conditions:
I recieve two messages (nav_msgs/OccupancyGrid) by two services. These two maps have the same resolution, ...
tiko
0
votes
1
answer
1
view
Creating 2d grid from laser scans
Is there a way to create an OccupancyGrid without using the 2D SLAM libraries? I have a turtlebot firing laser scans while rotating - the lasers collide into the rooms walls. I want to create an ...
AmaneSuzuha
0
votes
1
answer
1
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rosjava (on android) dependancies producing run-time errors
I've recently started working with ROS java and I've had decent success so far, however nav_msgs are not working. In my Android project I'm attempting to use OccupancyGrid from nav_msgs. I included ...
johnfertitta
0
votes
1
answer
4
views
Subscribing to the odometry topic
Hi,
I am very new to ROS and I'm using stageros as a simulator for my robot. I'm trying to write a c++ application that subscribes to the odometry topic (of type nav_msgs) and just write the contents ...
Nico