Drone photogrammetry has revolutionized the fields of construction and architecture. This 3D scanning technology, carried out with the aid of a drone, can be used to model and obtain the geometry of a structure with exceptional precision. From structural monitoring to 3D modeling, find out all you need to know. Good technical skills and knowledge of the best photogrammetry software are essential for success in this field.
Definition and principle of photogrammetry
Photogrammetry is a technique that uses photography to extract precise measurements and model objects and environments in three dimensions. Its principle is based on the acquisition of multiple images of the same object or area from different angles, enabling a three-dimensional model to be recreated from the visual data collected.
The principle of photogrammetry
The process begins with the capture of images, which are then analyzed by specialized software. This software detects and compares common points between images to estimate the perspective and distance from which each photo was taken. Using this information, they are able to build an accurate 3D model of the object or area in question. This modeling is often presented in the form of a point cloud, where each point represents a precise position in three-dimensional space.
What is the purpose of photogrammetry?
Everything you need to know about drone photogrammetry !
Drone photogrammetry has revolutionized the fields of construction and architecture. This 3D scanning technology, carried out with the aid of a drone, makes it possible to model and obtain the geometry of a structure with exceptional precision. From structural monitoring to 3D modeling, find out all you need to know. Good technical skills and knowledge of the best photogrammetry software are essential for success in this field.
Definition and principle of photogrammetry
Photogrammetry is a technique that uses photography to extract precise measurements and model objects and environments in three dimensions. Its principle is based on the acquisition of multiple images of the same object or area from different angles, enabling a three-dimensional model to be recreated from the visual data collected.
The principle of photogrammetry
The process begins with the capture of images, which are then analyzed by specialized software. The software detects and compares commonalities between images to estimate the perspective and distance from which each photo was taken. Using this information, they are able to build an accurate 3D model of the object or area in question. This model is often presented in the form of a point cloud, where each point represents a precise position in three-dimensional space.
What is the purpose of photogrammetry?
The applications of photogrammetry are vast and varied. In the field of surveying, it enables the creation of precise, detailed maps, essential for urban planning and land management. In architecture and engineering, it helps model buildings for inspections and renovation planning. Photogrammetry is also invaluable in archaeology, where it is used to document sites without physical disturbance, to monitor the evolution and degradation of natural habitats.
Photogrammetry is therefore a powerful tool, enabling us not only to measure and model with great precision, but also to improve the management and preservation of our environment and cultural heritage.
Photogrammetric applications
Here are three of the main applications of photogrammetry, demonstrating its importance and usefulness in different contexts.
The orthomosaic
One of the most common applications of photogrammetry is the creation of orthomosaics. An orthomosaic is a detailed, large-scale map that is generated by assembling multiple aerial photographs that have been corrected for optical distortions, perspective and tilts, producing a perfectly scaled image that can serve as an accurate map. This application is crucial for surveying projects, precision agriculture and urban planning, as it provides an accurate and complete overview of a large area.
Volumetry
Photogrammetry is also used to calculate volumes, an essential practice in many industrial sectors. For example, in the mining and building materials sectors, the ability to accurately measure the volume of stockpiles or quarries is essential for inventory management and cost control. By using 3D models generated by photogrammetry, companies can obtain accurate volume measurements without the need for intrusive methods, offering significant savings in time and resources.
3D modeling
Finally, 3D modeling is another important application of photogrammetry. This technique creates detailed, three-dimensional reproductions of objects, buildings and landscapes. In the field of heritage conservation, for example, 3D photogrammetric modeling helps to preserve and restore historic monuments. In the entertainment industry, it is also used to develop video game environments or film sets that require a high level of detail and realism.
In which sectors is photogrammetry used?
Photogrammetry has applications in a multitude of fields. Here’s a non-exhaustive overview of the main sectors using this revolutionary technology.
Surveying and mapping
Photogrammetry is fundamental to surveying and mapping, to create detailed maps and topographic surveys. These data are essential for urban planning, land management and construction, providing a reliable basis for engineering and land development projects.
Construction and architecture
In the field of construction and architecture, photogrammetry can be used to survey existing buildings for renovation or restoration. It also helps to monitor site progress and detect deviations from original plans, ensuring more efficient project management.
Managing natural and environmental resources
Photogrammetry plays a crucial role in environmental management, particularly in monitoring changes in natural habitats, evaluating soil erosion, and tracking deforestation. This information is vital for environmental conservation and natural resource planning.
Archeology ;
Archaeologists use photogrammetry to document sites and discoveries without disturbing the physical elements. This enables detailed site analysis and the creation of precise replicas of artifacts, thus contributing to the preservation of cultural heritage.
Security and surveillance
Photogrammetry is also applied in the fields of security and surveillance, enabling the reconstruction of road accidents or crime scenes for forensic analysis and documentation. It offers a precise representation that can be crucial for surveys.
In short, photogrammetry is a versatile technology that is permeating many sectors, enhancing traditional methods of measurement and visualization. Its ability to deliver accurate data quickly makes it an invaluable tool for professionals in a variety of industries.
How to do photogrammetry?
Photogrammetry may seem a complex technique, but by following a few clear steps, you can efficiently carry out your own photogrammetry projects. Here are the essential steps to get you started:
Mission planning
- Define the objective of your photogrammetric project.
- Select the area to be mapped or the object to be modeled.
- Plan flight paths or shooting positions for complete, efficient coverage.
Data collection
- Use a drone equipped with a high-quality camera to capture images.
- Make sure images overlap considerably (typically 60-80% vertical and horizontal overlap) for accurate reconstruction.
- For more precise measurements, consider using ground control points (GCPs) that you mark and measure in the study area.
Image processing
- Import your images into specialized photogrammetry software.
- The software aligns the images, detects common points and reconstructs the scene in 3D.
- Adjust the parameters as required to optimize the reconstruction.
3D model creation
- Once the images have been processed, the software will generate a point cloud, which can be refined into a 3D model.
- Clean up the model by removing any erroneous points or unwanted artifacts.
- Depending on the project, you can export the model in different formats for analysis or for use in other applications.
Data analysis and use
- Use the 3D model for specific analyses, such as volume calculations, inspections or the creation of topographical maps.
- Integrate data into larger projects, such as simulations, presentations or environmental analyses.
By following these steps, you’ll have the basis for carrying out photogrammetry projects, opening the door to a multitude of practical applications in your field of activity.
Specialized software
A number of software packages are available free of charge, but their use is still very limited. Nevertheless, you can find several paid versions at different costs for more or less optimal results. In order to offer you relevant and effective solutions, we have chosen to work with the Pix4D software suite, in particular PiX4Dmapper.
In the world of photogrammetry, PiX4Dmapper is a cutting-edge software package designed to transform images collected by drones into precise maps and detailed 3D models. Used by professionals around the world in fields as diverse as surveying, construction, agriculture and the environment, PiX4Dmapper is an essential tool for anyone seeking detailed, usable analysis of visual data.
PiX4Dmapper key features
PiX4Dmapper excels thanks to its powerful image processing capabilities, enabling users to generate high-quality results with precision:
- Complete automation: Starting from a set of images, PiX4Dmapper automates the process of creating 3D models, orthomosaic maps, point clouds and digital terrain models. This automation makes the software accessible even to photogrammetry novices.
- Accuracy and quality: the software incorporates optimization tools that fine-tune models for maximum precision. Users can also integrate Ground Control Points (GCPs) to increase the geospatial accuracy of projects.
- Flexibility and compatibility: Compatible with almost all drones and cameras, PiX4Dmapper is extremely flexible and can be used in a wide variety of projects and environments. What’s more, it offers options for exporting data in several formats, facilitating integration with other CAD or GIS applications.
PiX4Dmapper is a complete solution that enables users to transform images into precise geospatial information, usable in a wide variety of fields. With its ease of use, extensive compatibility and powerful features, PiX4Dmapper is indispensable for professionals who want to exploit the full potential of modern photogrammetry.
Drone photogrammetry training and courses
Many schools offer training courses in photogrammetry, from software operation to the use of different sensors. But before you commit, make sure that these training centers are credible and recognized. Some criteria to which you must be vigilant to ensure the credibility and quality of the training.
- School recognized as an expert in its field ;
- Accessibility to the latest technologies ;
- Support and field experience ;
- Availability of resources (advisers) once the training is completed ;
- Specialized training program: that responds precisely to your needs ;
- Recognized by public institutions.
Since 2013, DroneXperts has been offering a series of specialized training courses designed for those wishing to master drone photogrammetry, a skill increasingly in demand in various professional sectors. These courses are designed to provide the in-depth understanding and practical skills needed to succeed in this technical field.
Which professional drone is right for photogrammetry?
The choice of drone is a decisive step in guaranteeing the quality of photogrammetric data. Depending on the scale of the project, the objectives sought and the budget available, certain models stand out for their reliability, precision and efficiency in the field. Here are three options of particular interest to professionals.
DJI Matrice 4 E
Designed for engineering and advanced mapping applications, the DJI Matrice 4E is a robust, professional solution for high-precision photogrammetry. More powerful than a consumer drone, it is designed for demanding missions such as topographic mapping, site surveys, surveying or large-scale 3D modeling.
Its industrial design, in-flight stability and compatibility with specialized sensors make it ideally suited to complex environments and repetitive operations requiring high reliability.
Main technical specifications :
- Large-format sensor optimized for precision mapping
- Mechanical shutter (rolling shutter reduction)
- Integrated RTK module for centimetric accuracy
- Autonomy adapted to extended survey missions
- Compatible with DJI Terra and Pix4D workflows
- Secure long-range transmission
Thanks to its integrated RTK system, the Matrice 4E provides precise georeferenced data without the need for multiple ground control points (GCP), thus optimizing field time. It is the strategic choice for professionals in civil engineering, forestry, mining or infrastructure inspection.
DJI Matrice 400
For more demanding projects, the DJI Matrice 400 is the reference choice. Robust and modular, it offers the possibility of integrating different sensors and cameras according to mission requirements. Its in-flight stability and advanced features ensure highly accurate data collection, even in complex environmental conditions. It’s the drone of choice for large-scale worksites, large-scale topographic surveys or projects requiring maximum reliability.
On the technical front, the Matrice 400 can accommodate payloads such as the Zenmuse P1 (45 MP full-frame sensor, ideal for photogrammetry) or the Zenmuse L2 for LiDAR missions. It has a 55-minute battery life, a transmission range of up to 20 km and an integrated RTK system offering centimeter-level accuracy. Designed for harsh environments, it is IP45-rated and operates over a temperature range from -20°C to 50°C.
WingtraRAY
The WingtraRAY stands out for its vertical take-off and landing (VTOL) drone concept. It combines the maneuverability of a multirotor with the efficiency of a fixed wing, enabling it to cover vast areas in a minimum of time, while offering exceptional image quality. Particularly well-suited to large-scale projects (urban planning, precision agriculture, regional planning), it considerably reduces mission times while maximizing the accuracy of orthophotos and 3D models.
In terms of performance, WingtraRAY features Sony’s 61 MP MAP61 full-frame sensor, enabling GSDs (Ground Sampling Distance) as low as 0.7 cm/pixel at 120 m altitude. Its long autonomy of up to 59 minutes enables it to map over 700 ha in a single flight, several times more than a conventional multi-rotor drone.
Which sensors and lenses should be used for photogrammetry?
The accuracy and quality of photogrammetry results depend largely on the sensor and lens used. Depending on the complexity of the project, the surface to be covered and the level of detail required, certain sensors stand out for their performance and compatibility with professional drones. Here are three of the most relevant solutions currently available.
DJI Zenmuse P1
The Zenmuse P1 is DJI’s flagship sensor for aerial photogrammetry. Designed specifically for the Matrice series of UAVs, it incorporates a 45 MP full-frame sensor with interchangeable 24, 35 and 50 mm lenses, enabling precision to be adapted to mission requirements.
Thanks to its mechanical shutter and high capture speed, the P1 considerably reduces motion-related distortion, ensuring sharp, usable images for 2D and 3D modeling. Combined with the RTK/PPK system, it achieves centimetric accuracy, ideal for topographic surveys, surveying or mapping complex sites.
Applications
- Detailed mapping of large areas.
- Topographic surveys for urban planning and construction.
- High image resolution for infrastructure inspection.
DJI Zenmuse L2
Zenmuse L2 combines LiDAR technology with an integrated RGB camera. Although it goes beyond simple photogrammetry, it proves invaluable when conditions limit conventional photography, for example in densely vegetated environments.
It can generate up to 240,000 points per second with an effective range of up to 450 m, while offering vertical accuracy of around 4 cm and horizontal accuracy of 5 cm. Its 20 MP RGB camera, combined with LiDAR, facilitates the creation of textured 3D models. This makes the Zenmuse L2 particularly suitable for projects requiring rich, multi-dimensional data, such as civil engineering, forest management or corridor surveying (roads, power lines, pipelines).
Applications
- 3D terrain modeling, including forest areas and hilly terrain.
- 3D mapping for civil engineering projects where topographic accuracy is required.
- Environmental monitoring and natural resource management, where LiDAR data enable precise analysis of terrain and vegetation.
Each of these sensors brings advanced technical capabilities to a variety of photogrammetry needs, enabling you to achieve optimum accuracy and efficiency in your projects.
Conclusion
Drone photogrammetry embodies a major evolution in the way professionals collect, analyze and exploit visual data. By making accessible aerial surveys of a precision once reserved for complex topographic instruments, it has opened the way to a new era of efficiency, safety and creativity.
Over and above its technological dimension, this discipline has become a real strategic lever for companies wishing to optimize their processes and enhance the value of their data. Whether for urban planning, environmental management or architectural modeling, drone photogrammetry contributes to more informed decisions and a better understanding of the world around us.
The future of this technology looks promising: increasing integration of artificial intelligence, improved sensor resolution, automated analysis… all innovations that will continue to push back the limits of precision and productivity. For curious and visionary professionals, this is the ideal time to get trained and take advantage of this formidable tool for analysis and creation.
Frequently asked questions – FAQ
Is drone photogrammetry worth it?
Yes, without a doubt. Today, drone photogrammetry is one of the most effective methods of obtaining accurate geospatial data, while reducing costs and collection times. It provides highly reliable 3D models, orthomosaics and topographic maps. Whether for construction, surveying, agriculture or the environment, this technology is a major asset for professionals wishing to optimize their projects.
What’s the best free drone photogrammetry software?
There is no single answer to this question, as the best software depends above all on your needs, your level of expertise and the type of projects you carry out. Some free tools offer a good introduction to photogrammetry, while the paid professional versions guarantee superior precision and flexibility.
For a complete analysis and recommendations according to different user profiles, see our article: The best photogrammetry software in 2025: a complete comparison for professionals in Canada!
How much does a photogrammetry drone cost?
The cost of a drone for photogrammetry can vary considerably depending on requirements, expected performance and on-board sensors. Entry-level models are suitable for small, occasional surveys, while professional drones equipped with high-resolution sensors or LiDAR systems can cost several tens of thousands of dollars.
Before investing, it is essential to assess the nature of your projects, the accuracy required and the technical requirements necessary to obtain reliable results.
How do I become a specialist operator?
To become an operator specialized in drone photogrammetry, it is essential to acquire both technical skills and a solid understanding of the regulations in force. The first step is to obtain a drone pilot’s license issued by Transport Canada, either an advanced pilot certificate or a complex operations certificate, depending on the type of mission envisaged. This certification guarantees that the pilot has mastered the safety rules and legal requirements specific to commercial flying.
At the same time, it is highly recommended to take a course dedicated to photogrammetry, in order to learn how to plan flight missions, process images and analyze 3D data. This knowledge is essential for transforming aerial surveys into usable, accurate results.
The DroneXperts training center offers recognized and specialized programs combining theory, practice and personalized support. These training courses enable future operators to develop their skills, gain real experience in the field and prepare themselves effectively to work safely in a professional environment.
It’s with regular practice that you really perfect your skills. Each mission brings new challenges and lessons, enabling you to gain the precision, efficiency and confidence to become an increasingly skilled operator.