Documenting by photogrammetry method

Physical documentation is the concept of a complete and accurate impression of a historical building or site, taking into account all the complexities and details in the plan, volumes, decorations, grounds, etc. In fact, the purpose of documenting is to prepare very detailed maps of historical buildings or sites, which are usually prepared on a scale of 1:10 to 1:100. To do this, various methods are used, such as metrology, classical mapping, photogrammetry, laser scanners, and remote sensing, and each of these methods has its own accuracy (Faiz Elah Beigi, 2014). Photogrammetry is used in two forms: aerial photogrammetry to prepare maps of historical sites and areas up to 1:500 scale and short-range photogrammetry to prepare maps of historical monuments up to 1:10 scale in documentation. (Hijazi, 1382). Short-range photogrammetry, with its special features, is considered an efficient tool for mapping historical monuments. With this method, it is possible to prepare all kinds of engineering maps in the desired scale and accuracy, in a short time and at a reasonable cost, and create a national archive of cultural heritage (Figure 1).

Among the advantages of documenting by photogrammetry method:

– The possibility of taking very accurate photographs of the building at a high speed

– Ability to archive photos with drawings

– High speed and accuracy

– The possibility of extracting texture and color information at the same time as taking a photo

– Ability to review changes in a certain period of time

– Reconstruction of damaged parts

Faizullah Beigi, Arzoo, (2014), application of geomatics sciences in creating, recording, documenting and protecting historical and cultural heritage, National Geomatics Conference

Hijazi, Mehrdad, Azizi, Ali Yazdakhasi, Maryam (1382), Short-range photogrammetry and geometric roles in Islamic architecture and discussion on symbolic concepts, 6th International Civil Engineering Conference.