Photogrammetry is a technique for creating 3D models through specialized software that combines 2D images taken from different angles to reconstruct shape, scale, and details in 3D.
It is widely used in mapping and surveying, where it provides crucial data for land and infrastructure projects. In engineering and construction, it helps with site planning and tracking project progress.
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How Does Photogrammetry Work?
The photogrammetry process begins with capturing a series of photos of an object or area from different angles. To ensure accuracy, it’s important to take enough overlapping photos so the software can compare common points between them.
Relying on triangulation, the software examines the same points from different angles to calculate the depth and dimensions of the object. The more angles and overlap, the more precise the final 3D model will be.
High-quality cameras or drones are often used to capture the photos, especially for large-scale projects.
Types of Photogrammetry
Photogrammetry can be categorized into two main types: aerial and terrestrial.
Aerial Photogrammetry
- Captures images from high altitudes using planes, helicopters, or drones
- Ideal for mapping and surveying large areas like landscapes, forests, or urban environments
- Provides a bird’s-eye view for creating topographic maps and monitoring large-scale projects
- Drones offer flexibility, low cost, and high-quality images
- Common uses include agriculture, construction, environmental monitoring, and land surveying
Terrestrial Photogrammetry
- Focuses on capturing close-up images of structures
- Used for precise measurements and documentation of buildings or monuments
- Captures images from various angles to create detailed 3D models of a structures’ shape and condition
How Photogrammetry is Used
Mapping and Surveying
Aerial photogrammetry is vital for land surveys and infrastructure projects, providing detailed topographic maps crucial for planning roads, bridges, and other large-scale infrastructure.
Construction and Real Estate
In construction, photogrammetry helps with site planning, design, and monitoring progress. 3D models generated from aerial and terrestrial images allow construction teams to visualize a site before building begins. In real estate, Matterport tours offer a virtual property tour experience for potential buyers.
Environmental and Historic Preservation
Photogrammetry tracks environmental changes and preserves historical sites by creating accurate 3D models for analysis and conservation without physical interference.
Photogrammetry Experts Across the United States
Interested in aerial or drone photogrammetry for your next project? Explore how TrueScan can help bring your ideas to life—contact us today!