Aerial photography//Geography Practical

Basic Elements of Aerial Photo Interpretation

Aerial photographs are different from "regular" photos in at least three important ways:
• Objects are taken from an overhead or aerial position. Most are used to seeing objects from the
ground, and not from the air.
• Photos are taken at scales most people are not used to seeing.
• Sometimes, images obtained from satellites and high-altitude aircraft use color-infrared
photography. Color-infrared photography allows scientists to see things that are not visible to the
human eye. This provides scientists with a tool to study landforms, environmental pollution, and
other effects of human activities on the planet's surface.
These “basic elements" can aid in identifying objects in aerial photographs:
• Tone (also called Color or Hue). Tone refers to the relative brightness or color of elements on a
photograph. Some objects appear darker and more crisp than others.
• Size. The size of objects must be considered in the context of the scale of a photograph. The scale
will help you determine if an object is a small pond or a large lake. Major highways can be
distinguished from smaller roads. Long rivers can be distinguished from smaller tributaries.
• Shape. Shape refers to the general outline of objects. Regular geometric shapes are usually
indicators of human presence and use. Agricultural areas tend to have geometric shapes like
rectangles and squares. Streams are linear (line) features that can have many bends and curves.
Roads frequently have fewer curves than streams. Some objects can be identified almost solely on
the basis of their shapes.
 The Pentagon Building
 Football fields
 Cloverleaf highway interchanges
• Texture. The impression of "smoothness" or "roughness" of image features is caused by the amount
of change of tone in photographs. Grass, cement, and water generally appear "smooth", while a
forest canopy may appear "rough".
• Pattern (spatial arrangement). The patterns formed by objects in a photo can be used to identify
those objects. For example, consider the difference between (1) the random pattern formed by an
unmanaged area of trees and (2) the evenly spaced rows formed by a tree orchard.
• Shadow. Shadows aid interpreters in determining the height of objects in aerial photographs.
However, they also obscure objects lying within them.
• Site. Site refers to topographic or geographic location. This characteristic of photographs is
especially important in identifying vegetation types and landforms. For example, large circular
depressions in the ground are readily identified as sinkholes in central Florida, where the bedrock
consists of limestone. This identification would make little sense, however, if the site were underlain
by granite.
• Association -- Some objects are always found in association with other objects. The context of an
object can provide insight into what it is. For instance, a nuclear power plant is not likely to be found
in the midst of single-family housing. A vegetated area within an urban setting may be a park or a
cemetery. Wetlands may be located next to rivers, lakes, or estuaries. Commercial centers will likely
be located next to major roads, railroads, or waterways.

By: Dr. BAPPA SARKAR
Title: Aerial photography//Geography Practical
Sourced From: www.youtube.com/watch?v=93HfTg_bGIY

Check out the 3 highest-rated drones on Amazon in 2022

Frequently Asked Questions

Is it OK to fly a drone at night?

Drones are becoming increasingly popular. Drones offer amazing aerial shots of our houses and businesses. They are also great for delivering goods to large areas or capturing footage of sporting events. However, there are still very few regulations surrounding the use of drones. Some states in America have banned drones completely, while others have put restrictions on their operation.

Drones that are flown during daylight hours are quite safe. However, night-time operation can pose dangers. Drone pilots and others could be at risk if they are flying at night. This is due to the difficulty of spotting hazards and obstacles. A pilot's mistakes could lead to an accident.

Drones are becoming increasingly popular; therefore, we must learn how to operate them safely. There are two main types currently: fixed-wing or rotary-wing drones. Fixed-wing drones can be controlled more easily than rotary wing models. A fixed-wing aircraft usually has four propellers. A rotary-wing aircraft has one.

You should be familiarized with all local drone laws to avoid any mishaps. Another important safety tip is to ensure that your drone is fitted with lights, particularly ones that flash red and green. This will make it easier to identify potential dangers. Protect your camera lens from damage if you intend to take photos. Protective goggles are also recommended for drone pilots.

Drone flying at night poses several dangers. This includes collisions and damage to power lines, trees, or buildings. Drones may also lose or fall from the sky. Keep your drone clear of obstructions and close to the ground. Drones can be exposed to wind gusts and abrupt weather changes. These factors can disrupt your drone's flight and cause it to crash land.

Drones are becoming more popular but they can pose health risks. The drone's noise can damage the hearing and cause headaches. Furthermore, the vibrations caused by drones can cause damage to the body. The operator license allows you to fly drones, but it can also lead to legal action and fines.

You can prevent accidents by following these guidelines. Keep your drone within your sight line when flying. You must adhere to airport restrictions when flying near airports. It is important to be cautious when flying drones over water. This increases the chance of a collision.

What drone type do professionals use for their work?

Drones can be used to take amazing aerial photos. They are invaluable for taking aerial photos and recording video footage. They can also be used to survey land and take measurements.

These devices are commonly used commercially, such as to map large areas or check construction sites. There are many uses for these devices beyond their business purposes.

For example, drones can provide great entertainment value for families and friends. These machines can be flown in many different ways and taken to new locations. Drones are great for photographing and recording special events and celebrations.

When it comes to drones, the sky is your limit. Continue reading to find out how you can get the most from your drone.

What drone is best for aerial photography?

There are two options for aerial photography. Either rent a small, remote-controlled helicopter or purchase an expensive camera kit with a stabilizing gimbal.

The first option is great for those who plan to film a video or film. It gives you full control over the final shots. The second option will require you to pay more for the pilot and make you more dependent on him.

What happens if the shot doesn't look perfect? Drones can help you achieve this.

A drone is a tiny aircraft that flies autonomously and takes photos or videos without input from its operator.

They're extremely versatile and fly close to buildings and structures to capture images or record footage. They can also fly low in the air over crowds to capture photographs of people.

Drones are incredibly useful for aerial photography and videography. These drones can also be great for marketing as they enable you to create breathtaking visuals that would otherwise need a lot less manpower and equipment.

You can easily place them in strategic locations to capture stunning imagery. Plus, they can be flown remotely, which makes them easy to operate.

Companies may hire drones for their weddings. These wedding photographers can use their drones to fly above the ceremony area and capture amazing photos of the bride & groom.

They can also fly them to family members to take portraits. Or they can fly them over reception areas to capture beautiful views of the venue.

These activities are perfect to make promotional material or event coverage. Drones can also be used for short films. You could use one to show clients why your company is better than yours.

These are all reasons drones have become increasingly popular in aerial photography and videography. If you are looking to be a professional photographer, then a Drone might be the right choice.

Statistics

• Greater than 50% throttle stick position generates positive thrust, but less than 50% throttle stick position reverses the direction of the motors, allowing upside-down flying! (photographypro.com)
• Again, no stabilization is applied, and the 50% throttle stick position cuts the power to the motors. (photographypro.com)
• Homes with aerial images sold 68% faster than homes with standard images. (alexdronephotography.com)
• Here's proof: according to an analysis of FAA drone registration numbers by drone market research and data group Drone Industry Insights, DJI had a 76.8% market share in the U.S. (thedronegirl.com)
• 60 second video with branding, captions, contact information, and music Strip / Convenience / Neighborhood / Community Centers pricing per center (up to 400,000 sq ft) PLACE ORDER (dronebase.com)

External Links

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How To

What is the optimal distance for a drone's flight?

The best distance for a drone to travel is when it becomes an extension or part of you. If you start to see the drone as an entity separate from you, it becomes difficult to recognize its physical boundaries.

You can immerse yourself in your surroundings without worrying about the drone's next move.

A close approach to the ground can also have psychological benefits. This gives us more control over our environment, which makes us feel closer to nature.

There are downsides, however. Flying near the ground means we are exposed to wind and weather conditions that could damage the drone. So how far away do you fly?

It all depends on what type of drone you're flying. It is a good idea to maintain a minimum of 500 feet above the ground when you are trying to capture aerial footage.

You might choose to film a cityscape at 1,000 feet, for instance. This allows you to avoid blocking your view by trees and other buildings.

This is because drones tend to struggle with low-light conditions. If you are flying in the dark, you can reduce the time you spend hovering by lowering the altitude.

You should also ensure that the area where you fly is free from obstructions such as traffic signs or power lines.

It may be a good idea to fly during the day, rather than at night. This avoids reflections caused shadows and street lights.

The drone's size is another important consideration. The further it is from the ground the bigger the drone. For example, a large quadcopter will usually require a minimum height of 300ft.

The golden hour is the best time to capture drone footage.

This is the time between 3 and 6 PM. This is the time when you have maximum visibility because of direct overhead sunlight.

It's also known to be the "magic hour," and is ideal for capturing beautiful images.

Avoid flying drones at sunrise and sunset. These times can cause poor-quality footage.

Once you have these tips, it is time to begin creating incredible drone videos.