TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collections

Permanent URI for this collectionhttps://hdl.handle.net/20.500.13091/4

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Browsing TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collections by Publisher "Geomatik Journal"

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    Review
    Citation - WoS: 1
    Development Process of Reconstruction Implementation Legislation in Turkey
    (Geomatik Journal, 2022) Çay, Tayfun; Kandemir, Esra Sonel
    In this study, legislation and amendments of first zoning law the of Republic of Turkey was published in 1985 to until present day was examined and the development process in the legislation was considered. There are many issues regarding zoning in the zoning legislation. And Many changes have been made over the years. In the study, while considering this development process, especially legal regulations and amendments for zoning implementations, development readjustment share rate and content and zoning amnesties brought to buildings against the zoning legislation were emphasized. The Zoning Laws in Turkey until today, are constructed according to the principle of equal proportion method. However, alternatively, as a necessity the method based on equivalence principle was recommended to be regulated and development readjustment share rate that should be determined according to the equivalence method was proposed.
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    Article
    Citation - WoS: 2
    Do Equal-Area Projections Really Preserve Areas?
    (Geomatik Journal, 2023) Bildirici, İbrahim Öztuğ
    Map projections can be developed to preserve areas, angles, and lengths. Although the lengths are preserved in a certain direction, and the angle preserving is valid for differential quantities, the equal-area property is valid for both the differential and the finite quantities. However, areas of finite shapes are not exact in the projection plane except for regions bounded by meridians and parallels. The reason for this is that the great circle arcs that constitute the shape of the sphere and the line segments in the plane are not coincident. This effect is significant when a certain length of great circles that belong to a shape is exceeded. In this article, using variable-sized equilateral spherical triangles defined around a point, area errors are analyzed for a set of points defined at regular intervals for four selected projections. The area error varies depending on the size and position of the spherical triangle. For the selected projections, it has been shown at which intervals of point densification the area errors can be reduced. It was seen that the most sensitive projection in terms of area error was the equal-area cylindrical projection.
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    Article
    The Effect of Crustal Density Variation on Pite (primary Indirect Topography Effect)
    (Geomatik Journal, 2024) Öztop, Aleyna; Abbak, Ramazan Alpay; Üstün, Aydın
    In geoid determination studies, the main goal is to create a geoid model with an accuracy of 1 centimeter. Solving this goal in the fastest and most practical way makes it easier to implement some engineering problems. For this reason, the methods used to determine the geoid are being developed day by day. The Stokes-Helmert approach is one of the classical geoid modeling options. If the topography is not handled carefully in the solution of the boundary value problem, it is an obstacle to achieving the desired goal. In the final stage of the StokesHelmert approach, the exact geoid height is obtained by calculating the PITE (Primary Indirect Topographic Effect). The density change causes a significant difference in the PITE's calculation and, therefore, in the geoid heights. To see this difference, it is enough to use the digital elevation model and the crustal density model. In geosciences studies related to topography, the density value is usually taken as an average of 2.67 g/cm3. However, this value varies in some regions, approaching 20%. Such a ratio, which can be observed in the density change, affects the values obtained from the PITE calculation at the decimetre level. In this study, the effect of density change on PITE will be examined. In this way, an important contribution will be made to the centimeter accuracy geoid determination studies in our country. The PITE values depend on the height and density of the calculation point. As a result of numerical application, the density change gives PITE values between -43 cm and -1 cm, while under constant density these values are between -39 cm and 39 cm.