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What is Equirectangular Projection

Chapter 5
Handbook of Research on Visual Computing and Emerging Geometrical Design Tools
Equirectangular image projections maps the latitude and longitude coordinates of a spherical globe directly onto horizontal and vertical coordinates of a grid, where, in a case of entire sphere, this grid results twice as wide as it is tall. Consequently, horizontal stretching increases further from the poles, with the north and south poles being stretched across the entire upper and lower edges of the flattened grid. Equirectangular projections can show the entire vertical and horizontal angle of view up to 360° x 180°.
Published in Chapter:
From Spherical Photogrammetry to 3D Modeling
Wissam Wahbeh (University of Applied Sciences and Arts Northwestern Switzerland “FHNW”, Switzerland)
Copyright: © 2016 |Pages: 20
DOI: 10.4018/978-1-5225-0029-2.ch005
Abstract
The introduced research is about 3D modeling technique that can be considered as an assembly point of photography, topography, photogrammetry, and computer graphics. The chapter present survey methods based on spherical panoramas produced by image stitching techniques, which are proved efficient in order to obtain a high metric quality. It is an interactive survey system to generating 3D models of architectural structures and urban scenes. Photogrammetric fundamentals are applied using two different approaches to obtain the 3D model: the first one is by using texture-mapping techniques in the way of creating the virtual models; while the second is by using parametric visual programing process.
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