3D scanning for heritage and historic buildings
Capture the details that matter
A historic façade is not a uniform surface from a catalogue. Its shape, ornamentation and irregularities are part of the individual building. Using 3D laser scanning, we capture the accessible geometry of historic structures and prepare survey data for architects, designers and conservation teams.
Survey data for restoration and digital presentation
Façades and architectural features: Historic façades contain irregularities that simplified drawings can easily lose. Cornices, window surrounds, decorative features and variations in surface alignment may all matter to a conservation proposal. We use terrestrial 3D laser scanning to capture accessible geometry and supplement it with reference photographs. Scanner positions are selected around the building's complexity and available access; for elevated or obscured areas, we agree how additional information will be obtained in advance.
From the survey data, we prepare a point cloud and, where specified, elevations, sections or models of selected architectural features. Architects and conservation teams can revisit particular details without commissioning a new measurement for every question. Accuracy requirements, level of detail and processing scope are agreed around the intended use. We clearly identify surveyed areas alongside those that remained inaccessible or require further verification.
Restoration planning: Original documentation for a historic building may be incomplete or omit later alterations. A current survey creates a shared foundation for architects, designers, structural engineers and other specialists. We capture the accessible existing condition, the location of structural elements and the spatial relationships relevant to the agreed purpose. Drawings and models are therefore developed around the questions the project needs to answer, rather than presentation alone.
Outputs may include floor plans, sections, elevations and a 3D model supporting conservation design and coordination between disciplines. The model also makes spatial relationships easier to explain to the client and construction team. Surveying alone does not determine material properties, the age of building elements or their condition; these require the relevant specialist investigations. Digital survey information helps those investigations focus on the right locations and supports discussion around a common record.
Documentation before intervention: Before work begins on a heritage asset, a well-documented baseline is valuable. We capture accessible surfaces, selected details and spatial relationships so the record clearly shows what was present on the agreed date. At archaeological excavations, conditions permitting, the visible geometry of a particular stage can be documented before it changes or is covered. The scope and method are coordinated with the team responsible for the archaeological investigation or conservation work.
Photographs, point clouds and 3D models form an organised reference record. They support planning, communication between disciplines and later retrieval of captured details. Repeat surveys can document selected stages within an agreed, comparable scope. We distinguish measured geometry, visual evidence and specialist interpretation. Digital documentation supports archaeologists and heritage professionals while keeping the measurement record separate from the conclusions drawn from it.
Making architecture accessible: Not every partner can visit a historic property, and ordinary photographs often fail to explain its layout. An interactive 3D model or 360° tour lets viewers explore different angles, inspect details and understand spatial relationships. It can support specialist presentations, discussions with investors or public access to selected areas. Content and access arrangements are tailored to the purpose and agreed with the owner.
When unsurveyed parts are reconstructed from archive drawings, we explain what represents captured reality and what is an interpretation. This approach was used in our model combining a laser-surveyed façade with the remainder of the building reconstructed from drawings dated 1883. The client received both a technical reference and an accessible presentation of the property's story. The same data can therefore support conservation planning, documentation and communication, with the scope and limitations of each use made clear.
Archaeological sites in 3D: During an archaeological excavation, exposed features change progressively and some spatial relationships cannot be revisited later. Photogrammetry and, where appropriate, 3D laser scanning record visible surfaces, masonry and selected details at a specific stage. We agree capture scope, timing and methods with the excavation director so the documentation fits the project's recording system and schedule. Capturing the right information before the next intervention is essential.
Deliverables can include a textured 3D model, point cloud, orthographic views or sections through the recorded features. The specialist team gains a reference for comparing stages, preparing drawings and explaining spatial relationships to colleagues or the public. We clearly distinguish surveyed geometry from a reconstruction of an assumed earlier appearance. Formats, coordinate system and level of detail are agreed before capture. The data remains available after fieldwork and can support further analysis, publication or a digital presentation of the site.
Digital heritage archive: Managing a historic building is a long-term responsibility involving changing contractors, designers and custodians. When photographs, drawings and notes remain separate, teams have to search for the same information at every repair. We organise digital documentation by building, space and capture date. A virtual walkthrough can link a specific location to a detailed photograph, an available drawing or a team annotation. Managers can see exactly which part of the property each record concerns.
Repeat capture allows documented restoration stages to be compared and details before repair to be revisited. The archive supports specialist consultations, handover to a new custodian and planning of further documentation. Update scope, online access and file handover are agreed around the owner's requirements. Sensitive areas need not be included in the public presentation. The aim is a lasting reference that connects spatial data with existing knowledge of the building and supports continuity between successive phases of care.
When surveying meets the archives
In one of our projects, we scanned the façade from street and roof level and supplemented the survey with around twenty photographs. We processed the registered point cloud in Rhino 3D. According to our reference check measurements, the modelled façade achieved centimetre-level accuracy.
Archival drawings from 1883 enabled us to model the rest of the building as well. We clearly distinguish these elements: the façade is based on measurements, while the additional sections are based on historical drawings and modelling interpretation. The same data supported both technical documentation and a presentation of the building’s history.
Planning the restoration of a historic building?
Send us the location, available documentation and intended use of the survey data. Together, we will agree on the scanning scope, level of detail, accuracy and deliverable formats. We work throughout Slovakia.
info@auditair.sk | +421 904 421 420
