Direct bearing angles determination on globe

Bektaş, Sebahattin

doi:10.15406/mojce.2019.05.00159

Cited by 3 publications

(2 citation statements)

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“…To determine positions and distances, usually, they used Global Navigation Satellite System (GNSS) signals and the Haversine equation [3,4]. The diagram of Figure 2 helps understand the terms used, such as heading, true bearing, and relative bearing [5,6].…”

Section: Navigationmentioning

confidence: 99%

Development and Evaluation of a Mobile Application with Augmented Reality for Guiding Visitors on Hiking Trails

Silva

Jesus

Jorge

2023

MTI

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Tourism on the island of Santa Maria, Azores, has been increasing due to its characteristics in terms of biodiversity and geodiversity. This island has several hiking trails; the available information can be consulted in pamphlets and physical placards, whose maintenance and updating is difficult and expensive. Thus, the need to improve the visitors’ experience arises, in this case, by using the technological means currently available to everyone: a smartphone. This paper describes the development and evaluation of the user experience of a mobile application for guiding visitors on said hiking trails, as well as the design principles and main issues observed during this process. The application is based on an augmented reality interaction model providing visitors with an interactive and recreational experience through Augmented Reality in outdoor environments (without additional marks in the physical space and using georeferenced information), helping in navigation during the route and providing updated information with easy maintenance. For the design and evaluation of the application, two studies were carried out with users on-site (Santa Maria, Azores). The first had 77 participants, to analyze users and define the application’s characteristics, and the second had 10 participants to evaluate the user experience. The feedback from participants was obtained through questionnaires. In these questionnaires, an average SUS (System Usability Scale) score of 83 (excellent) and positive results in the UEQ (User Experience Questionnaire) were obtained.

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Section: Navigationmentioning

confidence: 99%

Development and Evaluation of a Mobile Application with Augmented Reality for Guiding Visitors on Hiking Trails

Silva

Jesus

Jorge

2023

MTI

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“…The face angle was calculated by calculating the arcus tangents from the facial landmarks that have been generated. Arcus tangent is a mathematical method that can be used to calculate the angle of a field, for example, the angle of a globe [51]. Facial landmarks data are in the form of a two-dimensional array or matrix.…”

Section: E Face Shape In Physiognomymentioning

confidence: 99%

Face Shape-Based Physiognomy in LinkedIn Profiles with Cascade Classifier and K-Means Clustering

Purwono

Ma’arif

Wulandari

2021

2021 8th International Conference on Electrical Engineering, Computer Science and Informatics (EECSI)

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The progress of a company is influenced by the excellent performance of its employee. The recruitment process should be done in a correct procedure so that it would not have the potential to harm the company. The improved use of social media can be an aspect to be applied in a recruitment process. LinkedIn is a social media platform that has many users which focuses on the career development aspect. Profile photos are commonly used in social media. In physiognomy, a personality analysis can be carried out based on his/her outward appearance. The profile photo can be an aspect of personality analysis with this knowledge. This research aimed to predict the face shape based on LinkedIn profile photos. A Cascade classifier algorithm with a haar-like feature was used to detect the face area. Dlib library was used to detect face landmarks. K-Means algorithm was used to differentiate the border of hair and facial skin. Indicators of the face shape calculation are the value of face angle, which is the arctangent of the face landmarks matrix; similarity value from the standard deviation calculation between horizontal line 1, 2, and 3; and diameter value which resulted from the standard deviation calculation between horizontal line 2 and vertical line 4. We provide output as face shape from the LinkedIn profile photos. Based on ten profile photo samples, only two predictions were incorrect.

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Rigorous spherical bearing with Soldner coordinates and azimuth angles on sphere

Bektaş

2022

Earth sci. res. j.

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Meridian systems, called Soldner coordinates (parallel coordinate) systems, have found wide application in geodesy. In particular, the meridian system constitutes a suitable base for the Gauss-Kruger projection of the ellipsoid and the sphere. Soldner coordinates can be used in Cassini-Soldner projection without any processing. As it is known, the directions of the edges are shown with azimuth angles in the geographic coordinate system and the bearing angles in the Soldner coordinate system. Bearing or azimuth angles are frequently used in geodetic calculations. These angles give the direction of sides in the clockwise direction from a certain initial direction. Both angle values range from 0 to 360 degrees and are usually calculated from the arctan function. But the arctan function returns an angle value between -90 and +90 degrees. Therefore, it is necessary to analyze the quarter for the angle found. For practical computations, the quadrants of the arctangents are determined by the signs of the numerator and denominator in the tangent formulas. Determining the quarter of the angles is done with if…, then…, end..., blocks on the computer. It should be noted that each comparison requires a separate processing time. This study will be given how to calculate both bearing and azimuth angles with direct formulas without any need to examine them. In addition, a solution proposal will be given against the division by zero errors in the bearing and azimuth angles calculations.

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Direct bearing angles determination on globe

Cited by 3 publications

References 0 publications

Development and Evaluation of a Mobile Application with Augmented Reality for Guiding Visitors on Hiking Trails

Development and Evaluation of a Mobile Application with Augmented Reality for Guiding Visitors on Hiking Trails

Face Shape-Based Physiognomy in LinkedIn Profiles with Cascade Classifier and K-Means Clustering

Rigorous spherical bearing with Soldner coordinates and azimuth angles on sphere

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