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.
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What we have learnt
- Relief displacement occurs on vertical photographs due to height variations of objects, affecting their true plan positions.
- Stereoscopy allows the creation of three-dimensional models from two-dimensional photographs, enhancing depth perception.
- Aerial triangulation helps determine 3D coordinates from stereo-photographs, reducing the need for extensive fieldwork.
Key Concepts
- -- Relief Displacement
- The horizontal displacement of objects in a vertical aerial photograph from their true geographic positions due to varying heights.
- -- Stereoscopy
- A technique that creates a 3D model from two images by utilizing depth perception and parallax principles.
- -- Aerial Triangulation
- A method used to determine the 3D coordinates of points by analyzing a series of stereo-photographs.
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