Authors:Olga Chumak, Julia Gorkovchuk Pages: 133– - 133– Abstract: In the last few years, intensive measures have been taken to monitor and inventory the cultural heritage of Ukraine. An important aspect is the preservation of such objects and their transmission to future generations. It is important to use such a methodology and technology when performing monitoring works, which in the future will make it possible to perform a number of other tasks, in relation to a certain specific object, based on previously obtained data. Therefore, this paper proposes a method of cultural heritage monitoring using UAV-filming. The work examines the methods of monitoring cultural heritage objects and presents an a priori assessment of the accuracy of monitoring of cultural heritage by means of UAV photography and laser scanning. The work focuses on the fact that the monitoring of cultural heritage sites should be carried out precisely with the help of modern filming methods, which have a number of advantages compared to traditional methods. The reliability of the proposed methods is presented and substantiated by calculating an a priori estimate of the accuracy of potential results. PubDate: 2023-10-13 DOI: 10.3846/gac.2023.18008 Issue No:Vol. 49, No. 3 (2023)
Authors:Ashraf G. Shehata, Fawzi H. Zarzoura, Mahmoud El-Mewafi Pages: 137– - 137– Abstract: It is critical to evaluate the reliability of using free online processing software for Global Navigation Satellite System post-processing since the advancement of GNSS gives satellite navigation customers all over the world great benefits. AUSPOS, IBGE, Magic GNSS, CSRS-PPP, and open-source software are some of the online processing solutions being evaluated for accuracy in this study. GNSS observations from IGS were used to conduct field observations using RINEX 3 data from three stations, with an observation duration of 30 seconds. After data acquisition, it was processed with online and free software that made use of GPS, GPS, and GLONASS. When compared to coordinates obtained from reference stations, the relative differences and correctness of the coordinates generated by each piece of software were then evaluated. coordinates in the ITRF14 reference for the X, Y, and Z directions. Online GNSS processing services may be used with greater accuracy for engineering and geodetic applications and are simple to use without the need for GNSS data processing expertise. PubDate: 2023-10-13 DOI: 10.3846/gac.2023.17499 Issue No:Vol. 49, No. 3 (2023)
Authors:Ekundayo Abayomi Adesina, Huzaifa Ishaq Muhammad Pages: 142– - 142– Abstract: Land degradation leads to the alteration of ecological and economic functions due to a decrease in the productivity and quality of the land. Land degradation over Minna, Niger State, was assessed using geospatial techniques. Studies between the rainfall and NDVI used on human-induced and climate-induced land degradation were correlated. Landsat imageries on a decadal scale (2000–2019) were processed and classified using a maximum likelihood classifier. NDVI trends are not by rainfall dynamics to human actions. Averagely low, about 24.14%, correlation was found between the observed land degradation and the precipitation factor, yielding more than 50% congruence in degradation induced by human activities. The study discovered that the built-up and bare surfaces are increasing. The long-term changes in built-ups were 96% between 2000 and 2019; conversely, a sharp decrease in vegetative lands at about –19.38%. Based on the terrain analysis, locations have less steep and moderate slopes in the study area due to continuous urban expansion and demographic pressure. Consequentially, over time, available lands not degraded within the study areas would be reduced. The study recommended a proper land management system of land use allocation and land cover activities. PubDate: 2023-10-20 DOI: 10.3846/gac.2023.16007 Issue No:Vol. 49, No. 3 (2023)
Authors:Atınç Pırtı, M. Ali Yucel, Ramazan Gürsel Hoşbaş Pages: 149– - 149– Abstract: Malaysia Airlines Flight 370, which was flying from Kuala Lumpur, Malaysia, to Beijing, China, lost communication with air traffic control shortly after take-off on March 8, 2014, and vanished. While the rest of the world awaited news of the missing plane and the 239 people on board, officials and experts began to look into the limited information available concerning the airliner’s real activities. The disappearance of a Malaysia Airline flight, carrying 239 passengers and crew, is one of the world’s biggest aviation mysteries. Despite all the efforts and evidence obtained so far, the crash site of Malaysia Airlines Flight MH370 could not be determined exactly. In this study, which we have done, the crash zone of the aircraft has been determined approximately by using the data in the previously prepared reports. In addition, the average ocean current speeds, directions and the parts of the debris of the aircraft were investigated on the satellite images, and the estimation of the area where the plane crashed was tried to be strengthened. PubDate: 2023-10-23 DOI: 10.3846/gac.2023.16726 Issue No:Vol. 49, No. 3 (2023)
Authors:Abdourhamane Halidou Amadou, Driss El Azzab, Abdel Ali Chaouni Pages: 157– - 157– Abstract: The main information provided by gravity maps is the geographical distribution of density heterogeneities in the subsurface. It is an important tool widely used for the mapping of geological structures, especially in the oil industry. Thus, this study based on the interpretation of aerogravity data has for objective, the qualitative description of the characteristics of the gravity anomalies of the study area, interpretation and mapping of the gravity lineaments as well as their depths, knowing that the lineaments constitute potential structural traps favorable to the accumulation of the hydrocarbons. Methods such as horizontal derivative, upward continuation and Euler deconvolution are used to give a geological signifiance to the different anomalies and to highlight deep structures. Thus, the analysis of the residual anomaly map revealed elongated negative and positive anomaly zones, oriented globally NW-SE, considered respectively as horst and graben zones. Gravity lineaments, considered as normal faults, are mapped using the horizontal gradient method. Finally, the depths of the density contrasts are estimated by the Euler deconvolution calculation using the value “1” as structural index. The depths thus determined are highly variable. The shallowest depths vary between 3000 m and 6000 m, while the deepest depths reach 18000 m. PubDate: 2023-10-24 DOI: 10.3846/gac.2023.17299 Issue No:Vol. 49, No. 3 (2023)
Authors:Viktoriia Lepetiuk, Vladislav Tretyak, Yuliia Maksymova Pages: 166– - 166– Abstract: The article examines the possibilities of using GIS technologies in the tourism sphere. The study focused on the conceptual modeling of tourism and the geoinformation support in planning tourist routes. The subject area of tourism as a conceptual model in terms of database modeling and GIS using UML language was characterized and presented. The method of using the GIS to solve the problem of modeling transport accessibility zones to tourist attractions in shaping transport routes has been proposed. The QGIS was used in tandem with a database management system such as PostgreSQL. GRASS GIS environment was used to perform spatial analysis. The object of this research is the transport network in one of the districts of the Ternopil region. We have tested in practice the proposed technological scheme on the example of the Ternopil district with the use of PostgreSQL database management system, QGIS, and GRAS GIS. We have created a tourist isochrone map of this region with some attractive places. The proposed methodology for determining transport accessibility using spatial analysis tools with the creation of isochrone maps and a flexible system of adjustments in the GIS makes it possible to optimize already existing tourism routes and create new ones. PubDate: 2023-10-26 DOI: 10.3846/gac.2023.17009 Issue No:Vol. 49, No. 3 (2023)
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