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  Subjects -> GEOGRAPHY (Total: 493 journals)
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Geodesy and Cartography
Journal Prestige (SJR): 0.156
Number of Followers: 2  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2029-6991 - ISSN (Online) 2029-7009
Published by Vilnius Gediminas Technical University Homepage  [15 journals]
  • The conceptual model of the structure and functional purpose of the
           geoinformation system for administrative and economic management of a
           regional airport

    • Authors: Dmitry Prusov, Olena Boyko
      Pages: 46–5 - 46–5
      Abstract: This article is devoted to the development of a conceptual model of the structure of the geoinformation system (GIS) for the administrative and economic management of regional airports, taking into account the requirements of world and national experience, international and national standards, modern technologies of geospatial data collection. The research is aimed at structuring all the facilities and objects of the airport complex and isolating components by location and function; development of a generalized scheme of directions for the use of administrative and business GIS at airports based on the analysis of world and domestic experience; establishing the need to use international and national standards of the “Geographic Information / Geomatics” series when creating an airport GIS; development of a generic scheme of the composition of the database of the Digital Single Topographic Base of the Airport, basic and profile geoinformation resources for the administrative and economic GIS; development of conceptual model of structure and functional purpose of GIS of administrative and economic management of the airport. The developed conceptual model reflects the main production processes and needs of airports, based on the database of the Digital Numeral Topographic Framework, is a complete and consistent model of the relationship between the administrative and economic needs of airports and the functionality of modern geoinformation systems for the efficient operation of objects, structures and facilities communications, analysis of the current state, monitoring and management decision-making.
      PubDate: 2022-05-25
      DOI: 10.3846/gac.2022.12570
      Issue No: Vol. 48, No. 2 (2022)
  • Determining the form of error distribution of geodetic measuring

    • Authors: Valeriy Gladilin, Vadym Belenok, Nataliia Shudra
      Pages: 56–6 - 56–6
      Abstract: Industrial equipment is a dynamic system and has deformations not only during installation but also during operation. Under the influence of variable load and displacement of the center of gravity, the soil under the foundation settles unevenly, and accordingly, the equipment deforms unevenly, which is a threat to the equipment, the greater the load corresponds to more subsidence.
      Separation of partial deformations from full is important for determining the elements of straightening equipment for its uninterrupted and trouble-free operation. The presence of significant total deformation does not affect the performance of the equipment. The most critical deformations are partial deformations. Absolute vertical deformations are calculated as the difference in sediment between adjacent sediment marks, which are fixed on the equipment in the same measurement cycle.
      Comparing the values of deformations with the allowable technical conditions, decide on the need for straightening and adjustment of equipment.
      The accuracy of installation is characterized by a tolerance of 0.1÷0.5 mm on the relative position of the equipment, which is conjugate mounted at a distance of several tens or hundreds of meters. For installation of the equipment with such accuracy carry out special geodetic works with use of methods and technical means of measurements specially developed for this purpose in geodesy, metrology and mechanical engineering.
      PubDate: 2022-06-06
      DOI: 10.3846/gac.2022.14403
      Issue No: Vol. 48, No. 2 (2022)
  • Determination of vertical displacements of infrastructure objects based on
           the radar interferometry data

    • Authors: Maksym Pakshyn, Ivan Liaska, Liubov Dorosh, Tetyana Grytsyuk, Oksana Gera
      Pages: 62–6 - 62–6
      Abstract: The aim of this paper is to determine the current capabilities of the radar interferometry methods and the expediency of their use for observations of the infrastructure vertical deformations on the example of the educational building of Ivano-Frankivsk National Technical University of Oil and Gas. Based on the obtained radar information, we were able to process an array of data for a short period using the method of Persistent Scatterers Interferometry (PS) (interferometry of constant reflectors of the radar signal). As a result, we determined the average velocity values of the vertical displacements of the university area. In order to establish the reliability of the results obtained by radar interferometry, the values of the structure displacements were measured according to the permanent station FRKV data, which operates in the IFNTUOG educational building №5. The results, based on both GNSS and radar interferometry methods, correlate and confirm the absence of significant deformation shifts of the construction.
      PubDate: 2022-06-20
      DOI: 10.3846/gac.2022.14414
      Issue No: Vol. 48, No. 2 (2022)
  • Development of a PostGIS-based method for creating risk maps of natural
           disasters using the example of Georgia

    • Authors: Levan Natsvlishvili, Nato Jorjiashvili, Vakhtang Kochoradze
      Pages: 70–7 - 70–7
      Abstract: This article discusses a method for creating a risk map of natural disasters for a specific area using PostGIS analysis. This method, which is described in detail, is based entirely on the use of open-source programs and spatial SQL directives. It is designed to use widely available GIS programs to create a flexible method that performs operations on OGC geometry. The area to be analyzed is covered with a polygonal grid. The size of the polygon is determined by the size of the study area. For each element of the grid (polygon), attribute values are determined for the traits characteristic of the area: seismic, landslide, mudflow, rockfall, population density, and number of buildings. The attribution values for geometry are assigned based on PostGIS analysis. The process of creating a risk map involves the summation of different hazard maps. Our method’s originality lies in the fact that the initial data is transformed so that it is possible to carry out map algebra operations with vector data. The method is designed to create risk maps based on OGC vector data analysis, which will help experts and stakeholders working on risk assessment and decision-making to develop a risk management strategy.
      PubDate: 2022-06-27
      DOI: 10.3846/gac.2022.14791
      Issue No: Vol. 48, No. 2 (2022)
  • Geovisualization for information extraction of shoreline changes in Padang
           city 2000–2020

    • Authors: Arie Yulfa, Deded Chandra, Risky Ramadhan, Adek Andreas
      Pages: 78–8 - 78–8
      Abstract: This study aims to create a system model that implements the concept of Geovisualization on shoreline changes in Padang city. This implementation is to make it easier to identify shoreline changes. The method used to detect changes is by interpreting satellite imagery with the Modified Normalized Difference Water Index (MNDWI) approach and the Digital Shoreline Analysis System (DSAS). The imagery used is Landsat 7 and Landsat 8 from 2000 to 2020. The model is designed with a Software Development Life Cycle (SDLC) approach. The results obtained are in the form of twenty shorelines per year as well as the amount of abrasion and accretion values from the interpretation. These results are visualized on an online-based map system that allows users to explore, synthesize, present and analyze the interpretation data. In conclusion, the Geovisualization system model is able to make serial data imagery presented dynamically to facilitate identification of shoreline changes.
      PubDate: 2022-06-28
      DOI: 10.3846/gac.2022.14212
      Issue No: Vol. 48, No. 2 (2022)
  • Object-based approaches for land use-land cover classification using high
           resolution quick bird satellite imagery (a case study: Kerbela, Iraq)

    • Authors: Hussein Sabah Jaber, Muntadher Aidi Shareef, Zainab Fahkri Merzah
      Pages: 85–9 - 85–9
      Abstract: Land Use / Land Cover (LULC) classification is considered one of the basic tasks that decision makers and map makers rely on to evaluate the infrastructure, using different types of satellite data, despite the large spectral difference or overlap in the spectra in the same land cover in addition to the problem of aberration and the degree of inclination of the images that may be negatively affect rating performance. The main objective of this study is to develop a working method for classifying the land cover using high-resolution satellite images using object based  method. Maximum likelihood pixel based supervised as well as  object approaches were examined on QuickBird satellite image in Karbala, Iraq. This study illustrated that use of textural data during the  object image classification approach can considerably enhance land use classification performance. Moreover, the results showed higher overall accuracy (86.02%) in the o object based method than pixel based (79.06%)  in urban extractions. The  object based performed much more capabilities than pixel based.
      PubDate: 2022-06-29
      DOI: 10.3846/gac.2022.14453
      Issue No: Vol. 48, No. 2 (2022)
  • Selection of an optimum global gravitational model for geological mapping
           of Afikpo and Anambra Basins in Nigeria

    • Authors: Ojima Isaac Apeh, Robert Tenzer
      Pages: 92–1 - 92–1
      Abstract: Combined Global Gravitational Models (GGMs) are being used in numerous geoscience applications, most notably for gravimetric geoid modeling (in geodesy) and for geological mapping and geophysical explorations (in the Earth’s sciences). The aim of this study is to evaluate the suitability of different combined GGMs that could be used for the geological mapping of middle belt region and Southeastern Nigeria. For this purpose, we digitized geological maps of Afikpo and Anambra Basins to evaluate geological signatures implied by gravity field quantities (Bouguer gravity anomalies and vertical gravity gradient) derived from the EGM2008, EIGEN-6C4, GECO, SGG-UGM-1 and XGM2019e_2159 gravitational models. We also stochastically evaluated the performance of these GGMs by computing their Root-Mean-Square (RMS) fit with ground-based gravity measurements. The results show that the EIGEN-6C4 and XGM2019e_2159 models have the best RMS fit with the ground-based gravity data. A spatial pattern in Bouguer gravity maps (compiled using these two models) generally closely agrees with a geological configuration of the basins, while also exhibiting some more detailed geological features. Interestingly, however, despite the XGM2019e has the best fit and better mimics major geological features, the gravity image from this model does not exhibit a sediment signature in a portion of the Afikpo basin. A possible reason is that the topographic information used to recover a higher-frequency gravity spectrum of this model might suppress a gravitational signature of subsurface density structures. A comprehensive interpretation of geological features thus requires a careful analysis of existing GGMs, terrestrial gravity data as well as all other reliable geological and geophysical information.
      PubDate: 2022-06-29
      DOI: 10.3846/gac.2022.14551
      Issue No: Vol. 48, No. 2 (2022)
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