#Ros occupancy grid data type update#

~/inflation_radius ( double, default: 0.55) NOTE: since the cost_scaling_factor is multiplied by a negative in the formula, increasing the factor will decrease the resulting cost values. The cost function is computed as follows for all cells in the costmap further than the inscribed radius distance and closer than the inflation radius distance away from an actual obstacle: exp(-1.0 * cost_scaling_factor * (distance_from_obstacle - inscribed_radius)) * (costmap_2d::INSCRIBED_INFLATED_OBSTACLE - 1), where costmap_2d::INSCRIBED_INFLATED_OBSTACLE is currently 254. A scaling factor to apply to cost values during inflation.~/cost_scaling_factor ( double, default: 10.0) This can be over-ridden on a per-sensor basis. The default range in meters at which to raytrace out obstacles from the map using sensor data.The default maximum distance from the robot at which an obstacle will be inserted into the cost map in meters.This parameter should be set to be slightly higher than the height of your robot. The maximum height of any obstacle to be inserted into the costmap in meters.~/max_obstacle_height ( double, default: 2.0) The frequency in Hz for the map to be publish display information.~/publish_frequency ( double, default: 0.0) The frequency in Hz for the map to be updated.~/update_frequency ( double, default: 5.0) If the tf transform between the coordinate frames specified by the global_frame and robot_base_frame parameters is transform_tolerance seconds older than ros::Time::now(), then the navigation stack will stop the robot. For example, a transform being 0.2 seconds out-of-date may be tolerable, but a transform being 8 seconds out of date is not. This parameter serves as a safeguard to losing a link in the tf tree while still allowing an amount of latency the user is comfortable with to exist in the system. Specifies the delay in transform (tf) data that is tolerable in seconds.

~/transform_tolerance ( double, default: 0.2)

The name of the frame for the base link of the robot.

~/robot_base_frame ( string, default: 'base_link')

The global frame for the costmap to operate in.

~/global_frame ( string, default: '/map') The costmap_2d::Costmap2DROS is highly configurable with several categories of ROS Parameters: coordinate frame and tf, rate, global costmap, robot description, sensor management, map management, and map type. If this option is selected, the costmap makes a service call to the map_server to obtain this map.

The costmap has the option of being initialized from a user-generated static map (see the static_map parameter).

#Ros occupancy grid data type update#

For each 'LaserScan' source listed in the observation_sources parameter list, information from that source is used to update the costmap.For each 'PointCloud2' source listed in the observation_sources parameter list, information from that source is used to update the costmap.For each 'PointCloud' source listed in the observation_sources parameter list, information from that source is used to update the costmap.Subscribed Topics ( sensor_msgs/PointCloud) Optionally advertised when the underlying occupancy grid uses voxels and the user requests the voxel grid be published.The cells in the costmap that correspond to the occupied cells inflated by the inscribed radius of the robot.~/inflated_obstacles ( nav_msgs/GridCells) Published Topics ~/obstacles ( nav_msgs/GridCells) 5 6 tf:: TransformListener tf( ros:: Duration( 10)) 7 costmap_2d:: Costmap2DROS costmap( ' my_costmap ', tf)