Measurement method of photogrammetry is based on thousands of photographs

Every successful building and renovation project begins with accurate and flawless source data. Buildings and structures of any scale – from statues to city blocks – can be measured with photogrammetry. Definition of photogrammetry is measuring by the means of photography. The subject, say, a facade of a building, is photographed comprehensively from every angle with a normal SLR camera and a drone when needed due to heights. The mass of usually thousands of photographs is then processed with an AI computer program, which produces the three-dimensional measurement data.

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Buildings and structures of any scale – from statues to city blocks – can be measured with photogrammetry

Typical 3D end products are point clouds and surface models. In 2D they are usually orthogonal projections in PDF and DWG formats. The accuracy of the data is enough for repair construction requirements, within some centimeters. The 3D data can be set on the coordinates desired.

Photogrammetry is especially suited for:

Exterior skins of buildings (although interiors apply in some cases).

Historic buildings.

Hard to reach places such as rooftops.

Documentation of digital twins for museal purposes or virtual visits (accessability)

In cases where lifelike, realistic models and images are desired, such as accessibility to non-professionals, who may have trouble understanding complex technical data. Photogrammetry looks real.

Interiors of buildings are usually surveyed by laser scanning. In BIM projects, laser scanning and photogrammetry data is often combined to produce an overall inventory model.

Photogrammetry can typically be produced for a budget of “four digits of Euros”, in very large or complex buildings the price exceeds 10 000 €. In short, photogrammetry is currently the fastest and the most cost-effective means to create reliable source data of the exterior skins of buildings.

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Accurate and flawless source data is produced with the help of photogrammetry

Measurement method of photogrammetry is based on thousands of photographs

Buildings and structures of any scale – from statues to city blocks – can be measured with photogrammetry

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Jaakko Hauru

Ilkka Terho

Tietoa Way of Doing Things

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