Photogrammetry: What, How, and Where

Developing 3D digital models of artefacts, monuments, excavations and historic landscapes as part of digital documentation is becoming common in the field of heritage management, virtual tourism, immersive Due to the present pandemic situation with restricted social distancing; gallery, library, archive, and museum (GLAM) industries are facing an incremental burden on both their income and visitor traffic, which is affecting their survival. As a way out, we can see some GLAM institutes are trying to expand their collections on digital platforms for showcasing and promoting virtual visits. Numerous online portals and repositories are evolving for archiving, sharing, and trading 3D models are also evolving to support this digital vibe. This chapter explains the basics of photogrammetry and its development workflow, including data acquisition (photo shooting), data processing and a few post-processing tools. visualisation and scientific research. Such 3D reconstruction or 3D data acquisition form a laser scanning process involves high costs, manual labour and substantial expertise. On the other hand, Image-based 3D modelling photogrammetry software offers a comparatively inexpensive alternative and can handle the task with ease. Besides, documenting heritage artefacts with free and open-source software (FOSS) in supporting photogrammetry is getting popular for quality data production.