Definition
Drone photogrammetry is the use of a drone to capture overlapping aerial photographs that are then turned into accurate 3D maps, models, and measurements. It combines the reach of a drone with the measuring power of photogrammetry.
By flying over a site and photographing it from many angles, a drone gathers the imagery needed to reconstruct the ground in three dimensions. The result can include orthophotos, elevation models, and detailed point clouds.
In simple terms, drone photogrammetry uses aerial photos from a drone to create precise, measurable 3D data of a site.
How It Works
A drone flies an automated path, usually a grid, capturing photos with enough overlap that each ground point appears in several images. Software then matches features across the photos, calculates the camera positions, and reconstructs the 3D geometry of the site.
This produces point clouds, orthomosaics, and elevation models. Ground control points with known coordinates are commonly used to georeference the outputs, ensuring the finished maps and models are accurate and correctly positioned.
Applications
Drone photogrammetry is used in construction, surveying, mining, agriculture, and inspection. It maps sites, measures stockpile volumes, tracks progress, and monitors land, delivering frequent, accurate, and detailed data with minimal disruption on the ground.
Benefits
- Accurate 3D maps and models from the air.
- Fast coverage of large or difficult sites.
- Rich visual detail alongside measurements.
- Frequent updates for monitoring and progress.
- Cost-effective compared with traditional surveys.
Related Terms
- Photogrammetry
- Drone Mapping
- Aerial Photogrammetry
- Orthophoto
Frequently Asked Questions
What is drone photogrammetry used for?
It is used to create 3D maps, models, and measurements for construction, surveying, mining, agriculture, and inspection.
How accurate is drone photogrammetry?
With good overlap and ground control points, it can reach centimetre-level accuracy, depending on the camera and flight height.
What is the difference between drone mapping and drone photogrammetry?
Drone photogrammetry specifically uses overlapping photos to build 3D data, while drone mapping is a broader term that can also include LiDAR.
What outputs does drone photogrammetry produce?
It produces point clouds, orthophotos, digital elevation models, and 3D models of the surveyed site.
About Track3D
Track3D helps teams turn drone photogrammetry data into accurate digital twins and reality capture insights. Learn more at Track3D.
