Electronic apparatus and controlling method thereof

A robot comprising:

• a memory storing map data corresponding to a traveling space, the map data comprising Z-axis information;
• a camera;
• and
• a processor configured to:
• cause the robot to travel to a first location and capture a first image by the camera at a first point in time when the robot is at the first location;
• cause the robot to travel to a second location and capture a second image by the camera when the robot is at the second location different from the first location at a second point in time different from the first point in time;
• use the first image to obtain first height information of an object included in one point of the map data;
• use the second image to obtain second height information of the object included in the one point of the map data;
• obtain third height information based on the first height information and the second height information, wherein the third height is a part not included in the first height information, from among second height information included in the second image acquired at the second location,
• update the Z-axis information corresponding to the one point based on the first height information and the third height information;
• determine, based on the Z-axis information corresponding to the one point, whether the one point of the map data is a drivable region that will not interfere with the driving of the robot;
• based on determining the one point of the map data is not a drivable region, set a travelling path of the robot to avoid the one point in the map data;
• and
• control the robot to navigate the travelling path,
• wherein the robot further comprises a communication interface, and
• wherein the processor is further configured to execute the instructions to cause the robot to:
• receive fifth height information about the one point of the map data from another robot, and
• update the Z-axis information corresponding to the one point based on the received fifth height information and at least one from among the first height information and the third height information.