Published: 09 Sep 2026
Photogrammetry is used across a wide range of industries, from construction and infrastructure to environmental monitoring and heritage conservation. Its flexibility and speed have made it a powerful tool for capturing real-world data, but like any technology, it works best when used in the right situations. Understanding where it adds most value, and where it doesn’t, is key to getting the best results.
Where photogrammetry works best
Photogrammetry can be effective for capturing large areas efficiently, as well as recording buildings, façades and small objects in fine detail. With appropriate image capture, survey control and verification, it combines visual detail with measurable data. Common applications include:
- Topographical surveys
- Infrastructure planning and design
- Construction progress monitoring
- Asset inspection
- Flood modelling and environmental studies
- Heritage recording and archaeology
- 3D modelling and visualisation
- Artefacts and objects
Outputs from photogrammetry
Photogrammetry produces a range of outputs that can support different stages of a project, including:
- Orthophotos – geometrically corrected images of ground surfaces or building elevations, from which measurements can be taken within their verified accuracy
- 3D models and point clouds – useful for visualisation and analysis
- Digital Surface Models (DSM) – representing visible upper surfaces, including buildings and vegetation
- Digital Terrain Models (DTM) – showing bare ground levels where sufficient ground is visible in the images; obscured areas may require other survey methods
- Topographic mapping products – interpreted and checked against ground truthing, and the agreed design or planning specification.
One of photogrammetry’s biggest strengths is that it captures a rich dataset of visible surfaces. So instead of collecting only what you need at that moment, photogrammetry often gathers far more information than is immediately required. This means the data can be revisited later, used for additional measurements and compared over time to monitor change, within its recorded coverage and accuracy. In many cases, you can capture once and then use the data many times, provided its suitability for each use is checked. Retaining survey control, coordinate information, capture dates, source data and a clear survey report helps make that reuse reliable.
Key benefits of photogrammetry
When used in the right context, photogrammetry offers:
- Rapid data capture over large areas
- Remote surveying that can reduce exposure to site hazards
- Rich visual outputs combined with measurable data
- A digital record that can be retained for appropriate future use
These advantages make it particularly attractive for projects where access is difficult, time is limited, or visual understanding is important, subject to suitable capture conditions and any required permissions.
When it might not be the best option
Despite its strengths, photogrammetry is not always the right solution.
Other methods, or a combination of methods, may be more appropriate when:
- Only a few simple measurements are needed and image-based capture would add little value
- The required accuracy cannot be demonstrated with the proposed capture, control and checking methods
- Visibility or image quality is poor (e.g. dense vegetation, obstructions, reflective or transparent surfaces, insufficient visual texture or unsuitable lighting)
In some cases, laser scanning, total stations or other survey methods may provide more suitable results or fill gaps. Small scale and demanding accuracy are not, in themselves, reasons to rule out photogrammetry.
Choosing the right approach
Photogrammetry is one tool within a wider geospatial surveying toolkit, not a one-size-fits-all solution. The best outcomes come from selecting the right method for your specific project needs, often combining multiple techniques to achieve the required accuracy and coverage. A competent geospatial surveyor should help define the specification and demonstrate that the results meet it. For clients, this means focusing less on the technology itself, and more on:
- What data and coverage you need
- The required accuracy and how it will be independently checked
- How the outputs will be used, shared and retained.
For detailed guidance on applications, limitations and specifying photogrammetry surveys, download the full client guide from The Survey Association website https://www.tsa-uk.org.uk/resources/downloads/
