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I want to get the global position of the robot by using rostopic echo /odom/pose/pose after reading through this page https://www.packtpub.com/books/conten... . However, I got the following error "WARNING topic [/odom/pose/pose/] does not appear to be published yet"
How exactly can I get the global position of the robot at any time I want?
You get that error because you must at first launch:
$ roscore
and the position can you read simply doing:
$ rostopic echo /odom
Here a possible output:
---
header:
seq: 101095
stamp:
secs: 1420486637
nsecs: 175732357
frame_id: odom
child_frame_id: base_link
pose:
pose:
position:
x: 2.50089152616
y: 0.00038276584683
z: 4.0
orientation:
x: -3.63592739957e-17
y: -5.36734448439e-17
z: 0.5609555557
w: 0.82784591835
covariance: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
twist:
twist:
linear:
x: 1.87866186506e-14
y: 2.40085554426e-18
z: 1.84354214137e-14
angular:
x: -1.27595314162e-19
y: -1.81827239624e-19
z: -7.25606212625e-14
covariance: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
Anyway I don't think you have clear how to use the frameworks ROS (it is normal at the beginning), so I suggest you again to read a book on how to setup your robot from scratch.
Asked: 2015-01-04 16:08:19 -0500
Seen: 402 times
Last updated: Jan 05 '15
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