Octomap
This is a ROS message definition.
Source
# A 3D map in binary format, as Octree
std_msgs/Header header
# Flag to denote a binary (only free/occupied) or full occupancy octree (.bt/.ot file)
bool binary
# Class id of the contained octree
string id
# Resolution (in m) of the smallest octree nodes
float64 resolution
# binary serialization of octree, use conversions.h to read and write octrees
int8[] data