PHOTOGRAMMETRY SURVEY
A photogrammetry survey is a specific type of topographic survey that uses photographs.
These are usually taken from aerial platforms like drones or aeroplanes.
We are then able to create detailed measurements and maps of an area.
Image Capture
Hundreds, or even thousands, of overlapping photographs, are taken of the target area from different angles and altitudes.
Drones are becoming increasingly popular for this purpose due to their flexibility and affordability.
Data processing
Specialised software analyses the overlapping images, identifying common features and reconstructing the 3D geometry of the landscape.
This process involves complex algorithms and calculations.
Deliverables
The final output of a photogrammetry survey can include various deliverables, such as:
Digital Elevation Models (DEMs)
These are grayscale images that represent the elevation of each point in the surveyed area.
Orthomosaics
These are high-resolution, georeferenced images that stitch together the individual photos to create a seamless, accurate representation of the ground surface.
3D models
These are digital representations of the surveyed area in three dimensions, allowing for detailed visualization and analysis.
Benefits of photogrammetry surveys:
Efficiency and cost-effectiveness
Compared to traditional surveying methods, photogrammetry can be faster and more affordable, especially for large or complex areas.
Accessibility
Accessibility: Drones can access areas that are difficult or dangerous to reach on foot, making photogrammetry a valuable tool for surveying remote or challenging terrains.
Detailed data
Photogrammetry can capture a high level of detail, providing valuable information for
Fast turnaround
With advancements in software and processing power, photogrammetry surveys can be completed and delivered quickly.
Applications of photogrammetry surveys
Construction
Creating topographic maps for site planning, volume calculations, and progress monitoring.
Land management
Mapping property boundaries, assessing land use, and monitoring environmental changes.
Infrastructure development
Planning and designing roads, pipelines, and other infrastructure
Archaeology
Mapping and documenting archaeological sites.
