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EN
The study assumes the use of old printed maps for conducting spatial analyses in the GIS environment. Information, in the form of point data on concentration of trace elements in soils of the Łódź agglomeration, was digitalised and then interpolated. The article includes descriptions of subsequent stages of operations performed in order to obtain digital results, as close as possible to data included in the geochemical atlas. The resultant geobase will be used for conducting spatial analyses aimed at delimiting areas of various degree of both heavy metal pollution and nutrient richness.
PL
Praca zakłada wykorzystanie starych map, wydanych w formie drukowanej, do prowadzenia analiz przestrzennych w środowisku GIS. Informacje w formie danych punktowych o stężeniach pierwiastków śladowych w glebach aglomeracji łódzkiej zostały zdigitalizowane, a następnie poddane procesowi interpolacji. Artykuł zawiera opisy kolejnych etapów działań realizowanych w celu uzyskania wyników w formie cyfrowej, jak najbardziej zbliżonej do danych zawartych w atlasie geochemicznym. Powstała geobaza będzie służyć do prowadzenia analiz przestrzennych, mających na celu wyznaczenie obszarów o różnym stopniu zanieczyszczenia metalami ciężkimi, jak również zasobności w składniki pokarmowe.
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EN
The purpose of this article is to report a study aimed at systematic assessment of the functionality of commercially available software for the automatic generation of area cartograms. The issue of the wide choice of algorithms developed over the years for generating various types of surfaces has also been raised. Cartograms (called also anamorphic maps) are constructed by changing the surface area of each spatial unit in step with the corresponding value of the mapped thematic variable (area cartogram) or changing accordingly the distance between the preselected focal point and other points on the map (distance cartogram). Depending on the shape of mapping units, the following three types of area cartograms can be distinguished: proportional symbol cartograms were the original shapes of mapping units have been replaced with simple geometric shapes such as squares, rectangles or circles (for example, Dorling Circle Cartograms, square cartogram); continuous regular cartograms where the shapes of areal units on the map resemble the actual shapes of the mapped units but their boundaries have been geometrized to consist of perpendicular sections; continuous irregular cartograms where the shapes of areal units on the map resemble the actual shapes of the mapped units but unit boundaries are not straight lines. Cartograms can also be constructed to preserve spatial contiguity (continuous cartograms) or not (noncontinuous cartograms), with the latter often preserving the underlying neighborhood relationships to some degree. While constructing area cartogram, one needs to decide first the type of a surface to be developed, and therefore, the algorithm to be applied. The next step in map construction is the choice of software, where tool selection depends often on the predetermined type of the cartogram. The study surveyed five programs for the construction of area cartograms – all available free of charge. Each of those software tools was used to generate area cartograms portraying data from the 2010 presidential election in Poland. Two groups of area cartograms where generated for the purpose of this study: maps of the entire Poland by voivodships, showing the number of valid votes cast for the two presidential candidates in each voivodship, and maps of the Mazowieckie voivodship by county, portraying the number of valid votes cast for the individual candidates in each county. The subsequent in-depth assessment of surveyed programs took into account eleven criteria including the number of cartogram types that might be developed using each program, availability of tools for the proper legend construction and display, possibility of supplementing the cartogram with complementary choropleth maps, the option for inserting map labels, the type of spatial data that can be used in the software (reference to points, lines, polygons) and so on. The study has demonstrated that the tool included in the ArcGIS (Cartogram Utility for ArcGIS) best met the survey criteria scoring 9 points. The application Scape Toad placed second (7.5 pts.), while MapViewer 7 came third (6.25 pts.). When generating cartograms in the available GIS programs, one should also pay attention to the visual qualities of the generated maps, and in particular, to the resemblance of shapes of spatial units on the map to the their actual geographic boundaries. Since the shape outlines obtained on the map vary depending on the underlying geodetic reference system, the best coordinate system for the mapped area should be selected. However, if such system cannot be used within a given cartogram generating tool, then the obtained cartogram should be exported and refined with some general software package for graphic editing.
EN
Changes in land use and land cover are a result of urban growth. Human activity has a vital role in city development since it helps to increase people's living standards, property values, accessibility, and safety. This study looked into the importance of legal procedures in accordance with the country's long-term development goals. It was also used to reveal the area's strengths, weaknesses, opportunities, and risks to the environment and people due to urban development. The study gathered data from both primary and secondary sources. The SWOT analysis was used to highlight the implications of urban growth in the research area. Maps analysis has been done using Geographic Information Systems (GIS). The statistical data on unauthorized filling was analyzed using Microsoft Excel. The findings show that, rather than being a source of strength and opportunity, urban expansion is also a source of weakness and risks. Threats to natural resources and humans, in particular, are disproportionately significant. Due to land demand, 62% of the land has been developed, jeopardizing the available marsh and paddy area. The growth of Kolonnawa urban council, which is located below mean sea level (MSL), causes flooding in the area every year. Based on a 50 year flood inundation, the grama niladari divisions of Wadulla, Orugodawatta, Meethotamulla, Gajabapura, Wijayapura, and Salamulla have been declared as high impacted locations.
EN
Historical maps are precious materials, which show spatial distribution of land use, vegetation, river patterns, and so on at the time the maps were produced. They are used for the reconstruction of past environments or for comparisons in time analyses. However the imprecision of the historical maps, in the geometrical sense, makes the task of the comparison very difficult. This drawback brings us to the idea of incorporating the historical maps into GIS, after geometrical transformation of the maps. It makes possible comparing and overlaying multiple maps from different time periods. Furthermore it gives map-scales to historical maps and enables broader range of quantitative considerations. This greatly increases the value of archival maps as information source. The paper outlines the procedure of incorporating old maps into GIS and some results of the transformation of early maps.
PL
W artykule scharakteryzowane zostały wybrane teoretyczne i praktyczne problemy związane z wykorzystaniem informacji pochodzącej z dawnych map w systemach GIS. Przedstawiono procedurę integracji map historycznych w systemach GIS oraz przykład jej zastosowania w badaniach zmian użytkowania ziemi.
PL
W artykule przedstawiono przykład zastosowania wybranych metod GIS w celu wykazania związków pomiędzy przebiegiem dolin kopalnych oraz współczesnych na obszarze Polski Środkowej. Analizowany obszar w warunkach lądowych kształtowany był już w paleogenie i neogenie, natomiast największy wpływ na obecną rzeźbę powierzchni odcisnęły procesy morfogenetyczne w czwartorzędzie.W opracowaniach paleogeograficznych dla analizowanego obszaru często wskazuje się na możliwe zależności pomiędzy wykształceniem rzeźby współczesnej a jej podłożem, w szczególności zaś sieci dolinnej. W celu weryfikacji tej hipotezy, na podstawie archiwalnych materiałów kartograficznych oraz Cyfrowego Modelu Wysokościowego rzeźby współczesnej, zaproponowano schemat przeprowadzenia analizy z wykorzystaniem zestawu ogólnodostępnych narzędzi GIS. Z wyników przeprowadzonej analizy można stwierdzić, że główne doliny rzeczne Polski Środkowej w dużej części nawiązują swoim przebiegiem do kopalnej sieci dolinnej, gdzie związki te najlepiej są widoczne w przypadku dolin największych.
EN
The article presents an example of application of selected GIS methods for showing connections between the course of palaeovalleys and contemporary valleys in Central Poland. The analysed area was shaped in the conditions of environment as early as the Palaeogene and Neogene, but the greatest impact on the present-day landscape came from the morphogenetic processes which operated in the Quaternary.Palaeogeographic studies of the analysed area often point to the possible dependencies between the contemporary landscape and its substrate, particularly as regards the valley system. In order to verify this hypothesis, on the basis of archival cartographic materials and a Digital Elevation Model of the current terrain, a procedure for conducting analyses with the use of commonly available GIS tools was proposed. Results of the conducted analysis allow for stating that the major river valleys of Central Poland in large part correspond to the arrangement of the fossil valley system, and the relationships are most easily noticeable for the largest valleys.
EN
There is no complete cure for HIV infection, but highly active antiretroviral therapy (HAART) has been applied to reduce the morbidity and mortality of HIV worldwide. Still, the ease of accessing these medications poses a serious concern. This work was carried out to understand the effectiveness and efficiency of area coverage of HIV drug centers. Google Earth Pro was employed to capture imagery of the study area and GPS instrumentation was used to pick the coordinates of the HCT and HIV Drugs centres within the study area. A questionnaire was then used to collect the attribute information of the facilities that exist. Subsequently, ArcGIS software was applied to import imagery to bring out the spatial entities of the area. Herein, GIS operations like network analysis, nearest neighborhood and Query were accessed. Average Nearest Neighbor Index (Rn) for HIV Drugs centres within Oyo metropolis was then calculated based on average straight line distance from each facility to its nearest neighboring facility. Herein, the Rn was 28.8. The Rn value indicates that spatial pattern of HIV Drugs centres in Oyo metropolis are dispersed. The Z-score (74.813624) and P-value (0.00000) reveals that the pattern of HIV Drugs centres in Oyo metropolis also exhibits significant dispersion. This means that the pattern of HIV Drugs centre location in the study area was significantly different from a random pattern. Network operation was then applied to determine best route from one HCT centre to HIV Drugs centre and to find if alternative routes were possible. The study shows that the spatial distribution of HIV Drugs centres is uneven - with 35 existing HCT (HIV Counselling and Testing) centres in 3 local governments, as well as 2 HIV Drugs centres. The service area calculation result shows other areas are in need of HIV Drugs.
EN
Rural development at the local level is a complex process, in which various actors are involved and various practices are performed. Nowadays, an important role in this process is assigned to rural communities, whose participation is essential. While in terms of the programming of rural development, it is still the rural area which is in the centre of attention, the theoretical concepts of rural development suggest that the process is even more local and specific to each village. This triggers the discussion whether the interpretation of the practices of rural development can be different depending on which spatial analysis unit is selected. The main aim of the paper was to empirically verify this hypothesis, on the example of the participation of local communities in the rural renewal programme in the Wielkopolskie Region. Hot spot analysis, based on spatial statistical methods, was performed. The discussion of the GIS tools – that can be used for this analysis – in the research on rural development was the second aim of the paper. The third aim was to contribute to the state of knowledge on the rural development fostered beyond the European Union policies. The main conclusion is that the most engaged communities tend to cluster, and such clusters are a specific kind of networks, which exist notwithstanding the administrative borders of rural areas. Both neighbourhood effect and cognitive distance are crucial for participation. Finally, the difficulties in the application of the tools used were identified, and these are related to the quantification of social phenomena and the selection of parameters of the very spatial statistical analysis.
PL
Rozwój obszarów wiejskich na poziomie lokalnym jest zagadnieniem niezwykle złożonym, co dotyczy zarówno uczestniczących w tym procesie aktorów, jak i praktyk przez nich podejmowanych. Współcześnie istotną rolę w tym procesie przypisuje się społeczności wiejskiej, a jej aktywność w działaniach na rzecz rozwoju uważana jest za kluczową. Podczas gdy w programowaniu rozwoju obszarów wiejskich centrum zainteresowania to obszar wiejski, koncepcje tego rozwoju wskazują na specyficzność tego procesu już na poziomie wsi. Daje to przyczynek do zastanowienia się, czy interpretacja określonych praktyk rozwoju obszarów wiejskich rzeczywiście może się różnić w zależności od przyjętej jednostki przestrzennej analizy. Empiryczna weryfikacja tej tezy na przykładzie aktywności społeczności lokalnych w programie odnowy wsi w województwie wielkopolskim była głównym celem pracy. Zastosowano w niej analizę hot spot, która opiera się na metodach statystyki przestrzennej. Dyskusja wykorzystania narzędzi GIS, pozwalających na przeprowadzenie tej analizy, w badaniach nad rozwojem obszarów wiejskich była drugim celem pracy. Trzecim zaś była kontrybucja do stanu wiedzy na temat rozwoju obszarów wiejskich realizowanego poza polityką Unii Europejskiej. Najważniejszym wnioskiem z przeprowadzonych badań jest to, że społeczności najbardziej aktywne tworzą skupiska, które stanowią specyficzną formę sieci powiązań, a ich istnienie jest niezależne od przebiegu granic administracyjnych obszarów wiejskich. Na aktywność tę decydujący wpływ mają jednocześnie efekt sąsiedztwa i bliskość poznawcza. Ponadto zidentyfikowano trudności w zastosowaniu wspomnianych narzędzi – problem kwantyfikacji zjawisk społecznych oraz dobór parametrów samej analizy statystyczno-przestrzennej.
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