I now only have .pcap file collected by my velodyne. I want to test gampping without a moving robot.
Here are the steps I did:
roslaunch velodyne_pointcloud VLP16_points.launch pcap:=/home/soowon/Documents/County_Fair.pcap
...
rosrun pointcloud_to_laserscan pointcloud_to_laserscan_node cloud_in:=/velodyne_points
At this moment, I can see the laserscan in RVIZ with frame of "velodyne", then I run this to get fake /tf:
rosrun laser_scan_matcher laser_scan_matcher_node scan:=/scan
..
rosrun gmapping slam_gmapping scan:=/scan
No error occurs, but I cannot see anything new in RVIZ, I added the topic map, but it says "no map received". I tried different frames in RVIZ, like: velodyne, map, world. It does not work.
Can anybody tell me what is the reason? Thank you very much!
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