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 2021-04-23 19:04:17 -0600 received badge ● Famous Question (source) 2015-07-23 03:01:54 -0600 received badge ● Famous Question (source) 2015-07-23 03:01:54 -0600 received badge ● Notable Question (source) 2015-03-13 18:54:59 -0600 received badge ● Popular Question (source) 2015-03-10 18:01:04 -0600 asked a question Coreslam Indigo Hello, is it possible to run coreslam in ROS Indigo and what would be the easiest way to do it for a ROS beginner? I use Ubuntu 14.04 Thank you in advance! 2015-03-04 06:36:55 -0600 received badge ● Enthusiast 2015-03-03 11:28:46 -0600 received badge ● Notable Question (source) 2015-02-28 02:58:57 -0600 received badge ● Student (source) 2015-02-27 08:34:33 -0600 received badge ● Popular Question (source) 2015-02-23 16:37:46 -0600 asked a question LaserScan points in laserscan frame Hello, i try to understand how the laserscan points are oriented in the laserscan frame. I publish my own laserscan message which includes 401 scan values in a range from -100 degrees to 100 degrees: ls_msg.header.frame_id = "scan_frame" ls_msg.angle_min = -100/180*math.pi ls_msg.angle_max = 100/180*math.pi ls_msg.angle_increment = 0.5/180*math.pi ranges_in_mm = struct.unpack('401H',rcv_str) ls_msg.ranges = [i/1000.0 for i in ranges_in_mm] # mm to m  But when i look at the laserscan in rviz and set the scan_frame as global fixed frame then the laserscan points start at -180 degrees. what am i doing wrong? Thank you in advance! EDIT: Ok, i found my mistake. I had to make a division of float values: ls_msg.angle_min = -100.0/180.0*math.pi ls_msg.angle_max = 100.0/180.0*math.pi ls_msg.angle_increment = 0.5/180.0*math.pi  2015-02-19 05:43:16 -0600 asked a question Problem seeing Laserscans in rviz Hello, I am new to ROS and try to work through same of the tutorials. I made the node to publish LaserScan messages from the tutorial http://wiki.ros.org/navigation/Tutorials/RobotSetup/Sensors and i can see with rostopic echo scan that it is working. Next i want to visualize it in rviz. So i opened rviz, added the /scan topic and set the fixed frame in Global options to laser_frame. I see that the messages are received and the Status for LaserScan is Ok, but i dont see any points or anything in the map. What am i doing wrong? I use Indigo with Ubunutu 14.04 Thanks in advance