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Possibilities of geoinformational analysis for assessment of the state and directions of development of geodetic support of the territory of Ukraine

Bespalko Ruslan, Kazimir Ivan, Hutsul Taras

Reports on Geodesy and Geoinformatics

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2022

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Vol. 113

21--28

EN

Topographic, geodetic and cartographic activities are one of the main activities for the effective development of the economy, science of strengthening national security and defense. It is a set of management, production, scientific and educational activities for the storage and communication to users of geodetic and cartographic information and data. The article considers one of the segments of this activity - the state of geodetic support of the territory of Ukraine and its assessment according to official data on the possibility of creating topographic maps and plans of scale 1:25 000 - 1:2000 in compliance with applicable regulations. To carry out the assessment, around the points of the State Geodetic Network of Ukraine (DGM) buffer zones of radii of circles of standard sizes were constructed, zoning of the territory with Thissen-Voronoi polygons and covering of the territory in the form of a hexagonal grid were done by means of ArcGIS. The results of the current assessment as of 2022 conducted by three methods are summarized in the table in terms of oblasts of Ukraine. The data obtained are compared to the previous assessment conducted five years ago. Changes in the state of geodetic support have been identified and their objective reasons explained. The advantages and disadvantages of each of the proposed methods of geoinformation analysis of the assessment of the state of geodetic support of the territories are given. It is established that the combination of different methods will allow to use the existing points of DGM with greater efficiency and to substantiate the priority places for further development of the network. The complex of scientific and applied works related to the modernization of the state geodetic network will allow to quickly and locally develop a network based on satellite and computer technologies and create and present digital cartographic information at the modern scientific and technical level in accordance with current needs.

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Spatial entropy changes for built-up areas in the vicinity of Kraków in the years 2014–2020

Kudas Dawid, Wnęk Agnieszka

Geomatics, Landmanagement and Landscape

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2021

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no. 4

103--116

EN

Information on landscape structure is an important issue for sustainable development and for making correct spatial planning decisions. Therefore, studies providing information on the diversity and changes of land cover and land use in a selected area are currently an important research topic. In addition to quantitative-qualitative statistics, spatial entropy is increasingly used to assess the degree of diversity of land cover and land use. This paper aim was to determine the diversity of objects within the land cover classes in the years 2014, 2017 and 2020, with a focus on built-up areas, in three districts bordering the city of Kraków, i.e. the Wieliczka, Kraków and Proszowice districts, located in the Małopolskie Voivodeship in Poland. In order to perform the analysis with the appropriate spatial resolution, a hex grid was used to determine the diversity of objects in the built-up area class. For this reason, data on land cover from the BDOT10k national database of topographic objects were used. The analyses followed the division into classes and objects defined in the structure of the BDOT10k database. The degree of diversity was determined using the Entropy Index and Herfindahl-Hirschman Index. Changes in the diversity of built-up areas were observed especially in areas located in close proximity to the border of Kraków, as well as on its eastern and south-eastern sides. A significant relationship was also observed between the increase in diversity of objects in the built-up area class and the immediate proximity of roads.

PL

Informacje o strukturze krajobrazu są istotną kwestią dla potrzeb prowadzenia zrównoważonego rozwoju oraz podejmowania właściwych decyzji związanych z planowaniem przestrzennym. W związku z tym badania dostarczające informacji o różnorodności oraz zmianach pokrycia i użytkowaniu terenu zachodzących w wybranym obszarze są aktualnie istotnym tematem badawczym. Do oceny stopnia różnorodności pokrycia i użytkowania terenu poza statystykami ilościowo-jakościowymi, coraz częściej jest wykorzystywana entropia przestrzenna. W niniejszej pracy określono stopień różnorodności obiektów klas pokrycia terenu w latach 2014, 2017 i 2020, ze szczególnym uwzględnieniem terenów zabudowanych, dla obszaru powiatów graniczących z miastem Kraków tj. powiatu wielickiego, krakowskiego i proszowickiego, zlokalizowanych w województwie małopolskim w Polsce. W celu przeprowadzenia analizy z odpowiednią rozdzielczością przestrzenną do określenia różnorodności obiektów w klasie terenów zabudowanych wykorzystano siatkę heksagonów. Do realizacji postawionego celu wykorzystano dane dotyczące pokrycia terenu z ogólnopolskiej bazy danych obiektów topograficznych BDOT10k. Analizy przeprowadzono z zastosowaniem podziału na klasy oraz obiekty zdefiniowane w strukturze bazy BDOT10k. Stopień różnorodności określono wykorzystując Entropy Index oraz Herfindahl–Hirschman Index. Zmiany zróżnicowania trenów zabudowanych zaobserwowano szczególnie w terenach położonych w bliskim sąsiedztwie granicy miasta Krakowa, jak również po jego wschodniej i południowo wschodniej stronie. Zaobserwowano także istotny związek pomiędzy wzrostem zróżnicowania obiektów w klasie terenów zabudowanych a bezpośrednim sąsiedztwem dróg.

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On a decomposition of integer vectors. 1

Aliev I.

Bulletin of the Polish Academy of Sciences. Mathematics

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2001

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Vol. 49, no 2

151-157

EN

It is proved that for every non-zero vector n = (nl, n2, n3) [belongs to Z^3] with height h(n) = max[i][belongs to]{1,2,3} |n[i]| there exist linearly independent vectors p,q [belongs to Z^3], such that n = up + vq, u, v [belongs to] Z and h(P)h(q) [is less than or equal to] C(n)(h(n))^1/2, where C(n) is an explicitly given function and 1 < C(n) < [2*3^(-1/2)].