Maison de mère d'Youville
Client / Collaborator
Soeurs Grises de Montréal | Gestion Providentia
Sector
Architecture, Patrimoine, Institutionnel
Location
Montreal
Services
Relevé LiDAR, Relevé par drone
Mandate
Document the Maison de mère d'Youville with a high degree of precision, including a high level of detail on the heritage envelope and reliable spatial consistency between interior spaces, circulation areas, and the basement. The goal is to produce a digital twin that can be used for measurement, coordination, and the production of technical drawings.
Mandate
Document the Maison de mère d'Youville with a high degree of precision, including a high level of detail on the heritage envelope and reliable spatial consistency between interior spaces, circulation areas, and the basement. The goal is to produce a digital twin that can be used for measurement, coordination, and the production of technical drawings.
Proposition
In order to guarantee a high level of accuracy and perfect consistency between the interior, exterior, and terrain, we implement a hybrid methodology structured around a primary control network.
Control network and coordinate system
A multitude of control points are captured to establish a local coordinate system for the building. These points are then used to constrain and stabilize other acquisitions, in order to avoid any drift and ensure consistent integration between datasets.
High-density terrestrial LiDAR
A terrestrial LiDAR scanning is carried out on the exterior of the building and in key traffic areas in order to capture the fine geometry of the masonry, openings, and architectural details. The stations are accompanied by HDR imaging to support clear reading of textures and materials.
Mobile LiDAR (SLAM) constrained by control points
Mobile LiDAR scanning is performed to capture the entire interior of the building. It is linked to control points to eliminate drift and preserve overall accuracy, even across multiple rooms and levels.
Drone photogrammetry for roofs
A drone survey is performed with a high-resolution camera and centimeter-accurate GPS to document the roofs. The point cloud from the images is constrained by control points from the LiDAR to ensure reliable geometric correspondence between the roof and the building envelope.
Deliverables
High-density point cloud in color
A unified point cloud serves as a basis for measurement, coordination, and drawing. It allows you to check alignments, record envelope details, and navigate interior spaces with a stable metric reference.
