Abstract: Certain examples described herein present a method of configuring a headset for display of a building information model (BUM) at a construction site. In one example, the method includes: determining a pose of the headset using a positioning system; obtaining an image of a two-dimensional marker positioned within the construction site; determining a BIM-to-camera transformation between an origin of a coordinate system used by the building information model and an origin of the coordinate system of the camera based on a location of the two-dimensional marker within the image; determining a camera-to-positioning transformation between the origin of the coordinate system used by the camera and an origin of a coordinate system used by the positioning system; and determining a BIM-to-positioning transformation.

Abstract: In described examples there is a method of matching a design model. In examples, a point cloud representation of a construction site is generated. The point cloud representation is generated using a positioning system that tracks a device such as a headset within the construction site. A building information model is obtained representing at least a portion of the construction site. One or more points in the point cloud representation are compared with the building information model to determine whether the construction site matches the building information model, wherein the point cloud representation is generated dynamically as the device navigates the construction site.

Abstract: Certain examples described herein relate to a mapping system. An example mapping system has a differentiable mapping engine to receive image data comprising a sequence of images captured using one or more camera devices of an object as it navigates an environment and a neural network scene representation comprising a neural network architecture trained to map input coordinate tensors indicating at least a point location in three-dimensional space to scene feature tensors having a dimensionality greater than the input tensors. The neural network scene representation is communicatively coupled to the differentiable mapping engine and the differentiable mapping engine is configured to use the neural network scene representation as a mapping of the environment during operation of the differentiable mapping engine.

Abstract: Certain examples described herein provide a headset for use in construction at a construction site. The headset has an article of headwear, sensor devices for a plurality of positioning systems, a head-mounted display for displaying an augmented reality image of a building information model, and an electronic control system with at least one processor. The at least one processor is configured to obtain a set of transformations that map between the coordinate systems of the plurality of positioning systems. The at least one processor is configured to use the set of transformations and at least one calibrated transformation to convert between the coordinate system of a pose and an extrinsic coordinate system used by the building information model to render an augmented reality image of the building information model relative to the pose of the article of headwear on the head-mounted display.