Method and system for navigating a robot in a designated environment

A method of navigating a robot in a designated environment, the robot comprising a controller configured to control movement of the robot, a sensor module configured to detect on-site reference features and a processor, comprising:

• (i) selectively identifying, by the processor, reference features from a scale plan of the designated environment, wherein the reference features comprise a plurality of free spaces identified from the scale plan that are potentially available for the robot to traverse in the designated environment;
• (ii) generating, by the processor, a topometric map of the designated environment, the topometric map being associated with the identified reference features, wherein generating the topometric map comprises generating a topological map by using the plurality of identified free spaces to find a path between any neighbouring two of a plurality of local regions of the designated environment;
• (iii) generating, by the processor, a potential navigation path from the topometric map, by associating the topological map to the identified reference features;
• (iv) as the robot navigates along the potential navigation path, detecting, by the sensor module, on-site reference features of each local region that correspond to the identified reference features of the scale plan;
• (v) updating, by the processor, the topometric map based on the correspondence to generate a regional path plan to guide the robot's direction in each local region;
• and
• (vi) controlling, by the processor, the controller to cause movement of the robot according to the regional path plan.