science

Unmanned aerial photogrammetric survey

Unmanned aerial photogrammetric survey is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Unmanned aerial photogrammetric survey rather than just read about it. In short: The unmanned aerial photogrammetric survey is the use of unmanned aerial vehicles (UAVs) to take photos for use in photogrammetry, the science of making measurements from photographs. Instruments manufactured for UAVs could be mounted on unmanned flying platforms of various sizes and types, such as octocopters.

Key takeaways

Unmanned aerial photogrammetric survey belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Unmanned aerial photogrammetric survey to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Unmanned aerial photogrammetric survey from memory before moving on to harder problems.

Reference excerpt

The unmanned aerial photogrammetric survey is the use of unmanned aerial vehicles (UAVs) to take photos for use in photogrammetry, the science of making measurements from photographs. Instruments manufactured for UAVs could be mounted on unmanned flying platforms of various sizes and types, such as octocopters. These machines are suitable for the full geodetic survey of a study site by creating a point cloud of measurements of nearly homogeneous quality and accuracy. These detailed point clouds (of various types of data) could be used in line with orthophotos etc. to obtain a complex data system representing the study site. Similarly to manned aerial surveys, UAVs are suitable to acquire three-dimensional digital models and orthophoto mosaics for a certain area. The biggest downside of this technology is that these UAVs, especially the smaller ones, could survey only a smaller area.

Comparison with manned aerial survey

Disadvantages Smaller UAVs are only able to survey smaller areas. The payload of the flying platforms is quite limited. The legal procedures are more complicated and lengthy than the ones for manned aerial vehicles (e.g. airplane kites). Reliable flying platforms of good quality are very expensive

Advantages The machinery could be transported to the study site by car, thus transportation costs are low. The deployment of the machinery is flexible. It can operate and produce measurements in cloudy conditions. The maintenance, storage, and running costs of unmanned platforms are cheaper than the same expenses of conventional aircraft. Moreover, the smaller high-quality unmanned platforms are more efficient, productive, and more durable than the conventional unmanned aircraft which could amortize quickly

References

Worked examples

Example 1 — a first encounter with Unmanned aerial photogrammetric survey

Start with the simplest possible case. Write down what Unmanned aerial photogrammetric survey claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Unmanned aerial photogrammetric survey before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Unmanned aerial photogrammetric survey ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Unmanned aerial photogrammetric survey

In research: Unmanned aerial photogrammetric survey appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Unmanned aerial photogrammetric survey in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Unmanned aerial photogrammetric survey is common in secondary-school and first-year university syllabi. It links to neighbouring topics Photogrammetry, Unmanned aerial vehicles, so understanding it makes those chapters shorter.
In everyday life: Look for Unmanned aerial photogrammetric survey outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Unmanned aerial photogrammetric survey in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Unmanned aerial photogrammetric survey means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Unmanned aerial photogrammetric survey out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Unmanned aerial photogrammetric survey in simple terms?

Why does Unmanned aerial photogrammetric survey matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Unmanned aerial photogrammetric survey?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Unmanned aerial photogrammetric survey.