On Wed, Oct 13, 2010 at 12:27 AM, eunchul Jeon wrote: > I want to get the static map using Hokuyo UTM-30LX > I suppose that I need odometry about device. Indeed, you need odometry information. While there exist techniques for building maps from just laser data, the algorithm implemented by gmapping is not one of them. Normally you would get odometry from wheel encoders on the robot that is carrying the laser. brian.