What are the characteristics of air photo?

(1) The lens axis is perpendicular to the surface of the earth. (2) It covers a relatively small area. (3) The shape of the ground area covered on a single vertical photo closely approximates a square or rectangle. (4) Being a view from above, it gives an unfamiliar view of the ground.

Which air photo type is useful for detail interpretation?

Larger scale aerial photograph will provide a detailed and high resolution view of a small area.

What is an air photo?

An aerial photograph, in broad terms, is any photograph taken from the air. Normally, air photos are taken vertically from an aircraft using a highly-accurate camera.

What is picture interpretation?

Image interpretation is the process of examining images and identifying and judging their significance by considering their location and extent.

Why is image interpretation important?

Image interpretation produces datasets delineating features identified in the imagery. These datasets can be the primary mapping products or can be used an ancillary data for further analysis, such as training data for supervised classification.

What are the advantages of visual image interpretation?

These high resolution imagery can help in fast visual interpretation by human eyes, the best image processor of all and even small objects be easily detected. Hence the human brain can identify an object by understanding, analyzing the context .

What are the keys of visual image interpretation?

Generally, eight standardized keys are established to eliminate the difference between different interpreters. The eight interpretation elements are: size, shape, shadow, tone, colour, texture, pattern, and association.

What does visual interpretation mean?

Visual interpretation involves visual analysis of aerial photographs and satellite images. When the interpretation is carried out with the help of computer software, it is known as digital interpretation.

What are the 7 visual elements?

The seven elements are line, color, value, shape, form, space, and texture.

What do you understand by visual satellite image interpretation?

The visual interpretation of satelllite images is a complex process. It includes the meaning of the image content but also goes beyond what can be seen on the image in order to recognise spatial and landscape patterns.

What are the methods of image interpretation?

In this lesson, you learned about three types of imagery: natural color, panchromatic, and color infrared. You learned about the importance of the GSD for imagery interpretation, and the seven types of cues used by the image interpreter: shape, size, pattern, texture, tone (and spectral signature), shadow, and context.

What are the advantages and limitations of visual image interpretation and digital image interpretation?

The advantage is it provides certain relative height information of the feature and also an idea of the terrain profile which is an aid to interpretation while the features under shadows are not very well identifiable is a disadvantage. So due consideration must be given to shadow while interpreting an image.

What is digital image interpretation in remote sensing?

Image interpretation in remote sensing is the examination of images, acquired by sensors using different portions of the electromagnetic spectrum, for the purpose of identifying objects and judging their significance. Multi spectral satellite images are used for better interpretation.

Which image is best quality for image interpretation?

A lower dot pitch is considered better image quality based on its resolution. For example a 1024 x 768 resolution has a dot pitch of 0.297. A 3840 × 2400 resolution has a dot pitch of 0.125. The latter would be much sharper than the former, thus having better image quality.

What are the issues faced during interpretation of image?

A lot of challenges in Image processing include. Processing of Video including a lot o security issues ( Watermarking, Encryption and Stenography) using the different compression techniques. Video transmission over real wireless channels.

What are the applications of photo interpretation in remote sensing?

Image interpretation of remote sensing data is to extract qualitative and quantitative information from the photograph or imagery. It involves identification of various objects on the terrain which may be natural or artificial consists of points, lines, or polygons.

What is image enhancement in remote sensing?

Image enhancement algorithms are commonly applied to remotely sensed data to improve the appearance of an image and a new enhanced image is produced. The enhanced image is generally easier to interpret than the original image.

What are the elements of image interpretation as per higher order complexity?

Site, Situation, and Association: These are higher-order complex key elements and very important to identify the object of activity in the given image for visual image interpretation.

What are the advantages of aerial photography?

(1) It provides a current pictorial view of the ground that no map can equal. (2) It is more readily obtained. The photograph may be in the hands of the user within a few hours after it is taken; a map may take months to prepare. (3) It may be made for places that are inaccessible to ground soldiers.

What is image Enhance?

Image enhancement is the process of digitally manipulating a stored image using software. The tools used for image enhancement include many different kinds of software such as filters, image editors and other tools for changing various properties of an entire image or parts of an image.