NCERT Class 11 Practical Geography Chapter 6: Introduction to Aerial Photographs

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When we look to an object directly – horizontal perspective
When we look below – birds eye view – aerial perspective
The photographs taken from an aircraft or helicopter using a precision camera are termed aerial photographs.
Aerial Camera : A precision camera specifically designed for use in aircrafts.
Aerial Film : A roll film with high sensitivity, high intrinsic resolution power and dimensionally stable emulsion support.
Aerial Photography : Art, science and technology of taking aerial photographs from an air-borne platform.
Aerial Photograph : A photograph taken from an air-borne platform using a precision camera.
Fiducial Marks : Index marks, rigidly connected at the central or corner edges of the camera body. When the film is exposed, these marks appear on the film negative .
Forward Overlap : The common area on two successive photographs in the flight direction. It is usually expressed in per cent.
Image Interpretation : An act of identifying the images of the objects and judging their relative significance.
Nadir Point : The foot of the perpendicular drawn from the camera lens centre on the ground plane.
Principal Point : The foot of the perpendicular drawn from the camera lens centre on the photo plane.
Principal Distance : The perpendicular distance from the perspective centre to the plane of the photograph.
Perspective Centre : The point of origin (perspective centre) of the bundle of light rays.
Photogrammetry : The science and technology of taking reliable measurements from aerial photographs.

Chapters:
0:00 NCERT Class 11 Practical Geography Chapter 6
0:03 Aerial Photography
0:05 Horizontal Perspective
4:03 Why Do We Actual Use the Aerial Photography?
4:15 Uses of Aerial Photography
6:51 Advantages of Aerial Photography
8:02 Types of Aerial Photographs
8:29 Vertical Photographs
9:34 Low Oblique Photographs
10:16 High Oblique Photographs
12:56 Types of Aerial Photographs
13:10 Large Scale
13:39 Medium Scale
14:08 Small Scale
14:38 Geometry of Aerial Photographs
14:55 Parallel Projection
15:27 Perpendicular Projection
16:00 Central Projection
18:02 Difference Between Aerial Photograph and Map
19:29 Perspective View
19:53 Planimetric View
20:48 Scale of Aerial Photographs
21:21 Establishing Relationship Between Photo Distance and Ground Distance
22:17 Establishing Relationship Between Photo Distance and Map Distance
23:51 Establishing Relationship Between Focal Length (f) and Flying Height (H) of the Aircraft
24:38 General Layout for Aerial Photograph
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Improved vantage point: Aerial photography provides a bird’s eye view of large areas
Time freezing ability: An aerial photograph is a record of the surface features at an instance of exposure – provide historical record
Broadened Sensitivity: Our eyes perceive only in the visible region of the electromagnetic spectrum, i.e. 0.4 to 0.7 μm whereas the sensitivity of the film ranges from 0.3 to 0.9 μm.
Three Dimensional Perspective: Aerial photographs are normally taken with uniform exposure interval that enables us in obtaining stereo pair of photographs #examrace #upsc #ugcnet

[PradeepSheoran]

At 5 : 24, kindly show Lakshadweep and Andaman Nicobar too as these are too form integral part of India .

[archh]

Thank you Ma'am....the presentation was just awesome!!

[sourajitsahoo]

Mam, please make a video on remote sensing.

[PujaDas-ycek]

Thank u mam and in this video, i like most how to calculate scale from the Arial photograph.

[apurbamandal]

All practical lecture upload Ma'am . Please Ma'am . Very informative lecture

[vettriselvi]

Very well and easily understanding all kind of poeple thank u so much mam

[Jeesto-Jiiro]

Thank you my dear teacher♥️ I have never seen a teacher like you. Only I would like to tell you the truth not praising for you teacher.

[tejaskhairnar]

Very nice teaching Mam, with imagination diagram, thank you 😇

[Jeesto-Jiiro]

Please teacher make complete vidoes about this chapter which is Photowork

[lahushinde]

Thank you so much I never want to learn this topic. But after watching this video, my doubt is cleared now. God bless you Ma'am 💕

[kismodedoha]

I want to like this video N number of time but it's now allowing good explanation

[adityayadav]

Thank u teacher. Your lectures are very understanding.

[shivpriyaa]

Mam in geometry of aerial photograph, can we write concept of collinearity is used? Is it ryt

[mrengineer]

Thank you soo much mam..You are a great teacher💞

[dipaksolanke]

Marathi madhe pan video lecture banawa mam

[ziva]

Thank you mam..It's easy to understand, and very helpful presentation.