unknown_cost_value
Im using ROS navigation package, during setting navigation parameters I have seen some used unknown_cost_value parameters by setting 0. I understood by setting it 0 it means robot should assume unknown celss as free, but I wonder what is the general tendency ? Should I set it 0 (FREE_SPACE) or LETHAL_OBSTACLE = 254 or NO_INFORMATION = 255 ? Isn't it awkward if I set unknown_cost_value to NO_INFORMATION=255 ?(why they didnt already set it to 255?)
Thanks.