Analysis of hyperboloid cooling tower projection on 2D shape
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1
University of Agriculture in Krakow
Department of Geodesy
2
Wrocław University of Science and Technology
Department of Geotechnology, Hydro Technology,
and Underground and Hydro Engineering
Submission date: 2021-07-01
Acceptance date: 2021-09-13
Publication date: 2021-09-30
Corresponding author
Andrzej Kwinta
University of Agriculture in Krakow
Department of Geodesy
30-149 Kraków, ul. Balicka 253a
Geomatics, Landmanagement and Landscape 2021;(3)
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ABSTRACT
This paper undertakes the problem of mapping a hyperboloid cooling tower on a single plane. Measurements performed by ground-based laser scanning technology quickly deliver substantial amounts of geometric data of the tower’s outer wall. The essence of the article is projection of the rotational hyperboloid on a plane. The shape of the hyperboloid cooling tower is not directly expandable to a single plane. Mapping a hyperboloid shape on a plane is, therefore, associated with distortions. This paper presents a comparison between cylindrical and conic projection of a hyperboloid cooling tower. The most popular method of mapping hyperboloid is cylindrical projection. The cylinder’s side surface is easily developed on the drawing sheet. For the hyperboloid cooling tower, the biggest distortions occur in the latitudinal direction and reach the highest values at the top and bottom edges. The equation (13) describe distortion for the cylindrical projection. The equation (18) describe distortion for the conical projection. This paper presents results obtained from the performed measurement. The analysis found that cone mapping produces less distortion than cylindrical projection for the hyperboloid cooling tower. We think, that in conical projection, the shape of a hyperboloid cooling tower and theoretical conic shape have better corresponding together than in cylindrical projection.