Regions with no obstacles within the range of the laser do not appear as free spaces

[JoBot88]

Good morning,

The documentation claims that: "The maximum range of the sensor. If regions with no obstacles within the range of the sensor should appear as free space in the map, set maxUrange < maximum range of the real sensor <= maxRange."

Unfortunately this does not seem to work for me. I have maxUrange = 3.9, maxRange = 4.0 and I get unknown space instead of free space if there is not obstacles within the range of my laser.

I use ROS kinetic on ubuntu 16. Any help would be much appreciated, thank you very much.

[shiveshkhaitan]

@JoBot88 Could you find an answer. I am facing the same problem.

[Kris-Zh]

@JoBot88 Could you find an answer. I am facing the same problem.//Do you have related papers？