Surveying and Geomatics | 4. Relief Displacement of a Vertical Photograph by Abraham | Learn Smarter
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

Typing
Memory
Math
English Adventures
Knowledge
4. Relief Displacement of a Vertical Photograph

The chapter discusses relief displacement and stereoscopy, emphasizing their significance in aerial photography and photogrammetry. It explains how relief displacement affects the accuracy of measurements on vertical photographs due to varying heights of objects, and the importance of stereoscopic modeling in providing depth perception through stereo-pairs. Lastly, it covers the essentials of aerial triangulation, highlighting its applications in mapping and surveying.

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.

Sections

  • 4.10

    Relief Displacement Of A Vertical Photograph

    Relief displacement in vertical photographs alters the perceived position of objects based on their height, leading to inaccuracies in measurements.

    Learning Practice

  • 4.11

    Stereoscopy

    Stereoscopy is a technique for creating a 3D perception using stereo-pairs of images.

    Learning Practice

  • 4.11.1

    Stereoscopic Model

    A stereoscopic model is created using a pair of stereo images to visualize depth perception, enabling the differentiation between objects in their spatial context.

    Learning Practice

  • 4.11.2

    Requirements Of A Stereoscopic Vision

    This section outlines the essential conditions needed to achieve stereoscopic vision for creating 3D models from stereo-pairs of photographs.

    Learning Practice

  • 4.11.3

    Stereoscopes

    Stereoscopes are optical devices used to view stereo-pairs of images, enabling depth perception by presenting separate images to each eye, thereby creating a 3D model of a landscape or object.

    Learning Practice

  • 4.11.3.1

    Lens Stereoscopes

    Lens stereoscopes are optical devices used for 3D viewing of stereo-pairs of photographs, essential for photogrammetry.

    Learning Practice

  • 4.11.3.2

    Lens And Mirror Stereoscopes

    This section explores lens and mirror stereoscopes, their construction, functionality, and applications in creating three-dimensional views of aerial photographs.

    Learning Practice

  • 4.12

    Determination Of Height From Vertical Aerial Photographs

    This section discusses the technique of determining the height of various objects from vertical aerial photographs using stereo-photographs and parallax measurements.

    Learning Practice

  • 4.12.1

    Orienting A Stereo-Pair Of Photographs

    This section discusses the process of orienting a stereo-pair of photographs to create a 3D model using stereoscopy.

    Learning Practice

  • 4.12.2

    Measurements By Parallax Bar

    This section discusses the concept of parallax in aerial photography, explaining how relief displacement of objects affects their measurement in stereo-pairs.

    Learning Practice

  • 4.12.3

    Measurement Of Absolute Parallax

    The section details the concept of absolute parallax in aerial photography, emphasizing its computation as the difference in distances from principal points.

    Learning Practice

  • 4.12.4

    Height Determination

    This section discusses methods for determining the height of objects using vertical aerial photographs, emphasizing the relationship between parallax measurements and elevation calculations.

    Learning Practice

  • 4.13

    Tilted Photographs

    Tilted photographs are taken with the camera at an angle greater than 30 degrees from vertical, resulting in distortions that prohibit their direct use for mapping and measurement.

    Learning Practice

  • 4.13.1

    Scale Of A Tilted Photograph

    The scale of a tilted photograph varies depending on the tilt angle and elevation of objects, influencing measurement accuracy.

    Learning Practice

  • 4.13.2

    Tilt Displacement

    Tilt displacement refers to the variation in images captured on tilted aerial photographs, affecting their apparent position and measurements.

    Learning Practice

  • 4.14

    Aerial Triangulation

    Aerial triangulation is a method in photogrammetry used to determine 3D coordinates from stereo-photographs, minimizing field work.

    Learning Practice

  • 4.14.1

    Types Of Aerial Triangulation

    This section outlines the two main types of aerial triangulation - radial triangulation and block triangulation, explaining their methodologies and applications in photogrammetry.

    Learning Practice

  • 4.14.1.1

    Radial Triangulation

    Radial triangulation is a method used to determine 3D coordinates from aerial photographs while minimizing fieldwork.

    Learning Practice

References

4b.pdf

Class Notes

Memorization

What we have learnt

  • Relief displacement occurs ...
  • Stereoscopy allows the crea...
  • Aerial triangulation helps ...

Final Test

Revision Tests