Once again, the selection of large or small scale photographs depends on the reason for the photography and the subject. Small scale aerial photographs cover a larger area. Small scale photographs are helpful for studying large areas with features that donвЂ™t need to be mapped or measured in detail. ThatвЂ™s why the pros call these types of aerial photographs small scale photographs.

Small scale aerial photographsвЂ“When the aircraft is flying at a higher elevation, there is a larger area that can be covered in a single image, but the ratio of size of objects in the photograph relative to the ground dimension is actually smaller.

Large scale aerial photographs show less area covered on the ground, but it is in greater detail. Large scale photographs are more useful for mapping land features and measuring objects. ThatвЂ™s why the experts call low elevation photographs large scale photographs. That means that the ratio of photo distance to the groundвЂ“or representative fractionвЂ“is of higher value.

Large scale aerial photographsвЂ“when the airborne aircraft is flying at a lower elevation, the camera captures images of less area, but the objects are seen in a bigger dimension.

There are two kinds of aerial photographs based on scale.

If not (approximately 30 degrees from vertical), it means the tilt is less, and that makes it low oblique. If the tilt is sufficient to capture the horizon in the aerial photograph (60 degrees from vertical or more), then it is a high oblique aerial photograph. With vertical photographs, the tilt is 3 degrees or less. The difference is in the degree of tilt of the camera axis. WhatвЂ™s the difference between high and low oblique aerial shots? Vertical photographs are better for mapping. Oblique photographs are helpful to reveal the topography in relief, which is useful for identifying geological or archaeological features. Those tilted less than 3 degrees are still considered to be vertical photographs as opposed to oblique photographs. You label an image oblique if the camera axis is tilted more than 3 degrees. It is difficult for you to take vertical aerial photographs in turbulent, unstable conditions, and therefore, many photographers opt to take aerial photographs with a tilted camera axis. The decision to use vertical versus oblique photographs is partially dependent on the flying conditions. High oblique aerial photographs show the horizon. That allows you to better identify natural or manmade features.

In contrast with vertical photographs, this level of tilt produces a great deal of relief. High oblique photographsвЂ“the camera axis has a higher degree of tiltвЂ“approximately 60 degreesвЂ“which covers a larger area, and the horizon is visible in the photograph.Low oblique aerial photographs donвЂ™t show the horizon. Low oblique photographsвЂ“unlike with vertical photographs, to take low oblique photographs you tilt the camera axis more than 3 degrees in a manner that the horizonвЂ“the area where the earth and sky meetвЂ“is not visible in the image.Vertical aerial photographs have no tilt in the camera axis. Experts most often use vertical photographs like a map. This results in little to no relief visible in the image and a smaller amount of area covered. Vertical photographsвЂ“the axis of the camera is in a vertical position.There are three types of aerial images based on the orientation of the camera axis: The choice of a particular kind of aerial photography is typically based on the subject and purpose of the imagery. There are several different kinds of aerial images in each of the three main categories. This photographic niche has a number of uses, but first letвЂ™s look at the various categories.

There are different kinds of aerial photography which experts categorize according to the camera axis (angle of the photo), the scale of the image (proximity and width of the area in the photograph), and the type of film. And, it is not the same as air-to-air photography where photographers are capturing images of other planes or airborne craft. To be considered an aerial photograph, you have to take the image with equipment that is not based on the ground. The term aerial photography refers to taking photographs from an elevated position, often using an airborne craft, including such equipment as rockets, airplanes, hot air balloons, and more recently, drones. Aerial photography is a fascinating niche that the pros use for many different purposes, and there are many different types of aerial photography.

Types of imagery ppt