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There is no need to use multiple lasers for gmapping, only a front laser is needed. Say your front laser scope is 180 degrees, you can make your robot turn left and right to get the map on the left and right.

After mapping, amcl can get robot pose for you.

There is no need to use multiple lasers for gmapping, only a front laser is needed. Say your front laser scope is 180 degrees, you can make your robot turn left and right to get the map on the left and right.

After mapping, gmapping, amcl can get robot pose for you.