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2017-03-24 04:58:03 -0500 | marked best answer | catkin_ws/ vs share/ Can anyone plaease explain to me what the difference between folders catkin_ws/ and /opt/ros/hydro/share is? what is the purpose of each? thanks! |
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2015-03-17 01:02:39 -0500 | commented answer | Does MRPT_navigation work in HYDRO? B) generally I dont know how to set this launch file up. in terminal I get this error : Failed to subtract global_frame (map) from odom_frame (r1/odom) I am only providing /scan topic and I have a ready map (previously generated in rviz by hector_slam) I would very much appreciate your help! |
2015-03-17 00:52:46 -0500 | commented answer | Does MRPT_navigation work in HYDRO? A) Thanks for help, Jose!
I tried following but had no luck.
So far I used your demo.launch file as a template:
1) I tried feeding my own map (.pgm, .tiff formats) but those didnt load. |
2015-03-14 04:10:54 -0500 | commented answer | Does MRPT_navigation work in HYDRO? Hi Jose! thanks for your help again! Another question: Does mrpt_localization package rely on odometry messages from robot? I used a slam method to generate a map that doesnt need odometry, since my robot doesnt provide odometry data. |
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2015-03-11 07:02:24 -0500 | commented answer | Does MRPT_navigation work in HYDRO? Thank you Very much, Jose! that helped. |
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2015-02-10 23:20:10 -0500 | asked a question | Does MRPT_navigation work in HYDRO? I tried to follow the steps described here: http://wiki.ros.org/mrpt_navigation/T... but catkin_make gives me errors. My steps are:
1)sudo apt-get install libmrpt-dev
2)cd After that, when building mrpt_navigation it gives me this: In my src/mrpt_navigation there are multiple mrpt folders and when I run roslaunch mrpt_localization demo.launch
it gives me: Error: cannot launch node of type [mrpt_localization/mrpt_localization_node]: cant locate node in package I am using ROS Hydro, Ubuntu 12.04 [edit] added full error message |
2015-01-28 23:55:56 -0500 | commented answer | Loading 2D raw data I know this is an old thread, but I cant get this method to work. I have the pgm file on my desktop, and I run rosrun map_server map_server mymap.pgm, but it cant open the file. Any help would be appreciated. Thanks! |
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2014-12-22 14:29:41 -0500 | marked best answer | urg_node vs hokuyo_node I am new to ROS and what I want to do is create maps for my robot with hokuyo lidar range sensors. I installed urg_node and hokuyo_node on my precise Hydro distribution of ROS. I dont understand what the difference between these 2 nodes is and which one should I use. Is it true that urg_node is simply a new version of hokuyo_node and I shouldn't have installed hokuyo_node? Also, some of the tutorials that explain how to use hokuyos only use hokuyo_node, so I'm a bit lost. My hokuyo device keeps being assigned a device name /ttyACM1 instead of /ttyACM0 which is why urg_node no longer works and I can't get laser data in rviz. Can anyone please HELP!!?? |
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2014-11-04 01:57:32 -0500 | commented question | cannot find log files Hi aswin, I am facing the exact same problem, My process dies, and the developer is asking for the log file, which I cannot find. Were you able to find that file? or how didi you debug? |
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2014-11-03 01:38:06 -0500 | commented answer | How can I merge scan topics al-dev So I created new question with more detail http://answers.ros.org/question/19653... |
2014-11-02 23:43:33 -0500 | asked a question | Node crashes Hi, ROS community. I need your help! So I was trying to run the ira_laser_tools https://github.com/iralabdisco/ira_la... package on my robot computer (kuka youbot with ubuntu 12.04 32-bit and HYDRO ROS) but it just keeps crashing. However on my PC (with ubuntu 12.04 64-bit and HYDRO ROS) it runs well and works as a part of my project. When I compiled this package with catkin_make on the robot I noticed some warnings like: /home/youbot/catkin_ws/src/ira_laser_tools-master/src/laserscan_multi_merger.cpp: In member function ‘void LaserscanMerger::laserscan_topic_parser()’: /home/youbot/catkin_ws/src/ira_laser_tools-master/src/laserscan_multi_merger.cpp:113:13: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 8 has type ‘std::vector<ros::subscriber>::size_type {aka unsigned int}’ [-Wformat] /home/youbot/catkin_ws/src/ira_laser_tools-master/src/laserscan_virtualizer.cpp: In member function ‘void LaserscanVirtualizer::virtual_laser_scan_parser()’: /home/youbot/catkin_ws/src/ira_laser_tools-master/src/laserscan_virtualizer.cpp:109:13: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 8 has type ‘std::vector<ros::publisher>::size_type {aka unsigned int}’ [-Wformat] Running just one laserscan_multi_merger node of this package gives me next error: ALSO THIS FILE IS NONEXISTENT: /home/youbot/.ros/log/6a789f88-6310-11e4-9d7c-000bab4510aa/laserscan_multi_merger-1*.log. SO I CAN'T EVEN FIND THE LOG FILE TO DEBUG rosrun ira_laser_tools laserscan_multi_merger gives me this: Anyone know what the problem is? |
2014-11-01 10:41:11 -0500 | marked best answer | How can I merge scan topics Hi all! I am trying to get a map from using 2 hokuyo lidars at the same time(for a 360 degree view). So far i did 2 tries: 1)I used a launch file that uses two hokuyo_node's to publish to the same 'scan' topic. I rotated one laser's frame 180 degrees around base_link. But that gave me inconsistent maps with a lot of drifting (maps would overlap, jump from 1 place to another and so on). Changing parameters didnt really help. 2)Then I tried to use 1 hokuyo_node to publish to 'scan' and another hokuyo_node to publish to 'scan_1'. (Again I roatated one lasers frame around the base_link). I also used two hector_mapping nodes that subscribed to those 'scan' and 'scan_1' separately but published to the same 'map' topic which is used by rviz. However in rviz I can only see 1 map at a time (they switch between each other in time) with no jumping or drifting. So now I want to use two hokuyo_nodes that publish to 'scan' and 'scan_1' separately with frames rotated correctly. After that I need to merge those scan and scan_1 topics into one topic which will be used by one hector_mapping node. My question is how can I do that? Do I have to write a c++ code ? and can anyone help me with that? I am not very experienced in programming Update: I was finally able to merge scan topics. there is a really good package provided by ira labs as al-dev mentioned in the answer. That package basically does what I needed. Now my problem is that I cant run that package on my robot computer, however it worked on my PC. |
2014-11-01 05:30:34 -0500 | commented answer | How can I merge scan topics 1) Hi thank you for the reply! I successfully used the package you suggested on my ubuntu 12.04 computer. But when I tried to do the same thing on a different computer with same ubuntu 12.04 hydro ROS I keep getting this error ( node dies) |