Jeoit, fiziksel anlamlı ortometrik yükseklikler için
referans yüzeyidir. Bu nedenle jeoidin yüksek hassasiyette belirlenmesi
yerbilimlerinde özellikle jeodezide hayati öneme sahiptir. Uygulamada jeoit
belirleme için çoğunlukla GNSS (Global Navigation Satellite Systems—Küresel Seyrüsefer Uydu Sistemleri)
ve nivelman verilerini birlikte değerlendiren birçok matematiksel yüzey ve
enterpolasyon teknikleri uygulayan geometrik yöntem kullanılır.
Geoid is a reference surface for physical
orthometric heights. Thus precise geoid determination is essential important in
geosciences especially in geodesy. For the geoid determination the geometrical
method that evaluates GNSS (Global Navigation Satellite
Systems) together with levelling data is mostly used in practice. In order to
determine geoid surface, many mathematical surfaces and interpolation techniques
are applied in this method.
Today the rapidly developing artificial intelligence and machine
learning technologies by behaving the human brain produce solutions to problems,
which have very complex algorithms. In this study, the artificial neural
network from artificial intelligence technologies was examined and also its
usability was tested in the geoid determination. For this purpose, a study area
that covers approximately 2765 km2 was selected and some tests were carried
out in this area by using 326 GNSS-levelling points. These points were divided
into training and test datasets in order to create various combinations. In
this context, some artificial neural network models and polynomial curve
surface models were yielded and comparison results were produced. According to
numerical results, it was observed that models of artificial neural networks produced
better results than the polynomial curve surface models in the homogenous and non-homogeneous
point distributions from viewpoint of “Rules of Large Scale Map and Map Data
Production”.
Multilayer sensors Geoid Determination Polynomial Curve Surface Fitting Artificial Neural Networks
Primary Language | Turkish |
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Subjects | Engineering |
Journal Section | Articles |
Authors | |
Publication Date | July 15, 2019 |
Submission Date | December 26, 2018 |
Acceptance Date | March 12, 2019 |
Published in Issue | Year 2019 |