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Hello
I wonted to load a map from a bag file using the map server but I could not. First I played the bag file during running the master with roscore. After finishind the play of the bag file in new tab i tried to load the map with rosrun map_server map_saver -f /filename
But I was waiting for the map and nothing. Any help??
The map_saver saves the map published on /map to a file.
The map_server loads a map and publishes it (latched) on /map.
Even though this question is quite old: You have to run the map_saver while the bag is still playing. If you start it after the bag has finished, there are no messages on the /map topic for the map_saver to capture and save.
If you want to make sure, that you only get the latest map messages out of the bag, use the following procedure:
rosbag info to determine the length of your bag in secondsroscoreand run the map_saver with the appropriate topic setrosbag play -s x bagfile.bag where x is the duration of your bag minus 3-5 seconds. (Depends on the rate at which the map is published. If it does not get a map, try to subtract longer timespans)This way you dont have to manually start the saver at the latest possible moment. :)
Asked: 2013-03-03 12:19:27 -0500
Seen: 22,443 times
Last updated: Apr 11 '13
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