Loading the lesson
Loading the lesson
Search AllRounder.ai
Search the courses, subjects, tracks, games and features, or jump straight to a page.
Search the courses, subjects, tracks, games and features, or jump straight to a page.
Learn it your way
A short class with Sarah and her students. The other ways are under More.
Sign up free to listen. Transcripts are free to read.
Today, we'll discuss two primary types of photogrammetry: aerial and terrestrial. Aerial photogrammetry involves capturing images from the air, typically using drones or airplanes, while terrestrial photogrammetry is done closer to the ground. Can anyone tell me why these differences might matter?
I think aerial photogrammetry would be better for larger areas, right?
Exactly, Student_1! Aerial photogrammetry is excellent for covering large regions quickly. Contrast this with terrestrial photogrammetry, which is more suited for detailed work on smaller areas or specific objects. Can anyone provide an example of when we might choose terrestrial over aerial?
Maybe when looking at a building's architecture or details?
Great example, Student_2! Terrestrial methods provide the precision needed for detailed analysis. Remember, think 'larger area' for aerial and 'detailed close-up' for terrestrial. Let's dive into processing methods next.
Now, let's classify photogrammetry based on processing methods. We have analog, analytical, and digital photogrammetry. Does anyone know what analog photogrammetry is?
Isn't it the old way using film and stuff?
That's right, Student_3! It utilizes film and optical instruments, which are quite different from today's techniques. Now, who can explain analytical photogrammetry?
It's when we combine analog images with digital computations for better accuracy!
Exactly, Student_4! Analytical methods bridge the gap between traditional and modern approaches. Now, what about digital photogrammetry? Anyone want to take a guess?
I think it uses only digital images and is way more automated?
Spot on! Digital photogrammetry leverages technology for speed and precision. Overall, we can remember: Analog is traditional, Analytical is a hybrid, and Digital is cutting-edge!
Capturing images from airborne platforms.
Capturing images from ground-based platforms.
Using traditional film-based techniques.
Combining analog with digital for accuracy.
Fully computer-based, utilizing digital images.
Aerial views high, capturing the land, while terrestrial shots go close at hand.
Once a bird, high in the sky, took photos of fields for mapping, oh my! Below, a photographer with a handheld camera, detailed the old buildings with great stamina.
A for Aerial, T for Terrestrial, A for Analog, D for Digital – a perfect APAD to remember!
APAD: Aerial, Terrestrial, Analog, and Digital - types of photogrammetry!
Term
What is aerial photogrammetry?
Click to flip
Term
What is terrestrial photogrammetry?
Click to flip
Term
What are the characteristics of digital photogrammetry?
Click to flip
Term
What is analog photogrammetry?
Click to flip
Term
What is analytical photogrammetry?
Click to flip
Capturing images from airborne platforms like drones or aircraft.
Capturing images from ground-based platforms or handheld cameras.
Traditional technique that uses film and optical instruments for capturing images.
Combines analog images with digital computations for enhanced accuracy.
Employs digital images and automated algorithms for extracting 3D information.
Photogrammetry is classified based on the capture platform and processing method.
This section explores the different classifications of photogrammetry, including aerial and terrestrial photogrammetry based on the platform, as well as analog, analytical, and digital photogrammetry based on processing methods. Each type has unique characteristics and applications in the field.
Photogrammetry can be categorized based on two main criteria: the platform used for capturing images and the processing methods employed to analyze these images.
Understanding these classifications is essential for selecting the appropriate methods and tools for specific applications in civil engineering and other fields.