git commit -m "first commit"

navigations/nav_msgs/msg/GridCells.msg

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+#an array of cells in a 2D grid
+Header header
+float32 cell_width
+float32 cell_height
+geometry_msgs/Point[] cells

navigations/nav_msgs/msg/MapMetaData.msg

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+# This hold basic information about the characterists of the OccupancyGrid
+
+# The time at which the map was loaded
+time map_load_time
+# The map resolution [m/cell]
+float32 resolution
+# Map width [cells]
+uint32 width
+# Map height [cells]
+uint32 height
+# The origin of the map [m, m, rad].  This is the real-world pose of the
+# cell (0,0) in the map.
+geometry_msgs/Pose origin

navigations/nav_msgs/msg/OccupancyGrid.msg

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+# This represents a 2-D grid map, in which each cell represents the probability of
+# occupancy.
+
+Header header 
+
+#MetaData for the map
+MapMetaData info
+
+# The map data, in row-major order, starting with (0,0).  Occupancy
+# probabilities are in the range [0,100].  Unknown is -1.
+int8[] data

navigations/nav_msgs/msg/Odometry.msg

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+# This represents an estimate of a position and velocity in free space.  
+# The pose in this message should be specified in the coordinate frame given by header.frame_id.
+# The twist in this message should be specified in the coordinate frame given by the child_frame_id
+Header header
+string child_frame_id
+geometry_msgs/PoseWithCovariance pose
+geometry_msgs/TwistWithCovariance twist

navigations/nav_msgs/msg/Path.msg

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+#An array of poses that represents a Path for a robot to follow
+Header header
+geometry_msgs/PoseStamped[] poses