Robot Mower Navigation: RTK, Vision, LiDAR and Boundary Wire

Navigation and obstacle detection are different jobs

Localization tells the mower where it is relative to the map. Boundaries define the permitted area. Obstacle detection helps it react to objects along its route. Advertising often combines these under labels such as “AI navigation,” but a mower may have excellent boundary localization and still miss a low object. Conversely, an obstacle camera cannot on its own establish a precise virtual property boundary in every condition.

Husqvarna's robotic mower test explanation separates boundary accuracy from obstacle handling and cautions that real-world behavior around tree canopy, buildings, low objects and moving wildlife differs from standardized tests. Use that distinction when comparing manufacturer claims.

RTK/GNSS positioning and virtual boundaries

RTK uses satellite positioning and corrections to help locate a mower accurately within a mapped yard. Depending on the system, it may require a reference station, network assistance, an appropriate location for its antenna or other setup components. Satellite visibility can be affected by buildings, dense trees and local surroundings. A lawn that looks open from the patio may include narrow areas where signals are obstructed.

For example, Husqvarna EPOS uses satellite-based RTK-GNSS virtual boundaries, with a reference station required for a listed commercial model. That illustrates why the exact package contents and installation requirements matter. “Wire-free” alone does not mean that every system works without infrastructure or a usable positioning signal.

Camera/vision-based assistance

Cameras may identify paths, detect selected obstacles, support localization or complement another positioning system. Actual functions depend on the model, training and sensor configuration. Lighting, dirt on a lens, grass color, shadows, weather and objects outside the system's detection classes can still affect performance. Do not assume a camera-based machine will reliably see every pet toy, branch, child or small animal.

ANTHBOT's Genie family lists RTK and vision-based capabilities. In our model comparison, that is recorded as a combined technology label, not an endorsement that the mower can map every shaded or tree-covered yard. Read the exact instruction manual and ask the manufacturer about difficult parts of your property.

LiDAR and sensor fusion

LiDAR systems measure distances using light and may support local mapping, localization or obstacle perception. Some products combine LiDAR with cameras, wheel sensors, satellite positioning or other inputs. Product implementations vary significantly, and the existence of a LiDAR sensor does not guarantee reliable mapping through tall grass, rain, dense vegetation, transparent objects or every narrow passage.

A fair comparison should ask what the manufacturer explicitly promises: how the mower creates a boundary, whether the map is saved, what happens when positioning confidence drops, whether it pauses safely, and how it deals with dynamic obstacles. We should not assign an automatic “good under trees” rating to an entire sensor category.

Physical boundary wire

Traditional robotic mowers may use installed perimeter wire to define the mowing area. This can reduce dependence on satellite boundary positioning but requires installation, maintenance and careful routing. Wires can be damaged during digging or landscaping, and the allowed boundary slope may be more restrictive than the machine's maximum slope inside the mowing area. Manufacturer manuals should be checked for the boundary and work-area limits separately.

For an existing garden with many beds, fences and changing landscape zones, compare the cost of installation with the flexibility of virtual boundaries. A physical wire does not remove the need to check terrain hazards or obstacle performance.

What to check in a yard with trees or buildings

Sketch the property and note dense canopy, narrow routes between buildings, fences, retaining walls, covered passages and areas where a mower must cross between grass zones. Identify a possible charging-station location and determine whether installation equipment is included. Then ask for model-specific evidence rather than relying on broad terms such as “RTK,” “AI” or “LiDAR.” The Lawn Area Calculator estimates how much grass must be maintained, while the large-yard guide explains why layout can reduce practical throughput.