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    Wyświetlanie 1-8 z 8
    Tytuł:
    Application of satellite remote sensing in investigation of environment in Poland
    Autorzy:
    Ciołkosz, Andrzej
    Białousz, Stanisław
    Powiązania:
    https://bibliotekanauki.pl/articles/703300.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Remote Sensing Centre
    land use
    image maps
    NDVI
    yield forecast
    monitoring of Baltic
    Opis:
    The Remote Sensing Centre has been set up within the Institute of Geodesy and Cartography shortly after launching the first environmental satellite. The main task of the Centre was to use satellite images in research of environment. The Landsat images have been used by the Centre to elaborate the first maps of land use in Poland. Satellite images have also been used to assess the forest damage in Sudety Mountains, elaboration of the satellite maps, assess of the air pollution in the country and elaboration of the soil data bases for Poland. Satellite images acquired in microwaves have been used to map a flood extent in Odra River Valley and to estimate damage caused by the flood. The most diverse application satellite images found in agriculture. They were used for assessment of the stage of crop development, crop yield and production of the cereals in Poland. Several other scientific institutes have also used satellite images in their investigation. One of them was the Institute of Oceanology. It has used satellite images for the Baltic ecosystem monitoring.
    Źródło:
    Nauka; 2008, 3
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    City image based on mental maps - the case study of Szczecin (Poland)
    Autorzy:
    Osóch, Barbara
    Czaplińska, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/2135542.pdf
    Data publikacji:
    2019-05-04
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    City image
    mental maps
    space perception
    Szczecin
    Polska
    Opis:
    Perception of space is an especially important part of research on urban fabric. The perception of a city is strongly correlated not only with a specific time and place but, first and foremost, with surveyed populations who, apart from having varying demographic features, frequently represent disparate community and cultural profiles. The objective of this study was to assess how the urban space of Szczecin (Poland) is perceived by its inhabitants and to ascertain the relations between various image elements. The example of Szczecin appears to be interesting, in as much as it is a peripheral city of a cross-border region with a historically and culturally diverse local community. The presented research used a method of analysing mental (image) maps based on the methodology proposed by Kevin Lynch (1960) and modified by the authors to incorporate in-depth interviews. Individual respondents' views were used to create a synthetic image of the city.
    Źródło:
    Miscellanea Geographica. Regional Studies on Development; 2019, 23, 2; 111-119
    0867-6046
    2084-6118
    Pojawia się w:
    Miscellanea Geographica. Regional Studies on Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Territories, Borders and Communities in the Imperial Practices of the 18th and 19th Centuries Viewed from the Perspective of Cartography and Nation-building (the Case of the Russian Empire)
    Autorzy:
    Vengerska, Victoria
    Powiązania:
    https://bibliotekanauki.pl/articles/668363.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Papieski Jana Pawła II w Krakowie
    Tematy:
    Empire,
    maps
    borders
    mental cartography
    image-based geography
    national territory
    Opis:
    The modern phenomenon of a nation is directly connected with the outcomes of the French Revolution, the latter having predetermined the political, social and economic processes of the 19th century. With cosmopolitan empires becoming, so to say, “incubators” for the nations, the Russian Empire was no exception. Perception of the borders, territories and the population of the empire shaped the processes of capturing new territories, their further attribution to the newly formed imperial historical framework, which in the course of time impacted national constructs. The scientific implications of the phenomenon of an empire and imperial practices triggered the research in the field of imperial history. The tools of image-based geography allow to reveal additional details and peculiarities of states and nations developing within the imperial environment. The author focuses on the processes of projecting, mapping and visualizing the territories with their ethnic population. The article demonstrates the ways the political relevance impacted the layouts of regions, borders and demographic characteristics.
    Źródło:
    The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II; 2019, 9, 2; 109-120
    2391-6559
    2083-8018
    Pojawia się w:
    The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Image Retrieval Based on Text and Visual Content Using Neural Networks
    Autorzy:
    Castro, D. A.
    Seijas, L. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/108732.pdf
    Data publikacji:
    2010
    Wydawca:
    Społeczna Akademia Nauk w Łodzi
    Tematy:
    image retrieval
    Self-Organizing Maps (SOM)
    content-based image retrieval (CBIR)
    Text-Based Image Retrieval (TBIR)
    ParBSOM
    Scoring function
    Opis:
    In the last few years there has been a dramatic increase in the amount of visual data to be searched and retrieved. Typically, images are described by their textual content (TBIR) or by their visual features (CBIR). However, these approaches still present many problems. The hybrid approach was recently introduced, combining both characteristics to improve the benefits of using text and visual content separately. In this work we examine the use of the Self Organizing Maps for content-based image indexing and retrieval. We propose a scoring function which eliminates irrelevant images from the results and we also introduce a SOM variant (ParBSOM) that reduces training and retrieval times. The application of these techniques to the hybrid approach improved computational results.
    Źródło:
    Journal of Applied Computer Science Methods; 2010, 2 No. 1; 21-39
    1689-9636
    Pojawia się w:
    Journal of Applied Computer Science Methods
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Segmentation-based Method of Increasing The Depth Maps Temporal Consistency
    Autorzy:
    Mieloch, D.
    Grzelka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/226645.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    depth maps
    depth map estimation
    temporal consistency
    image segmentation
    free-viewpoint television
    virtual view synthesis
    Opis:
    In this paper, a modification of the graph-based depth estimation is presented. The purpose of proposed modification is to increase the quality of estimated depth maps, reduce the time of the estimation, and increase the temporal consistency of depth maps. The modification is based on the image segmentation using superpixels, therefore in the first step of the proposed modification a segmentation of previous frames is used in the currently processed frame in order to reduce the overall time of the depth estimation. In the next step, a depth map from the previous frame is used in the depth map optimization as the initial values of a depth map estimated for the current frame. It results in the better representation of silhouettes of objects in depth maps and in the reduced computational complexity of the depth estimation process. In order to evaluate the performance of the proposed modification the authors performed the experiment for a set of multiview test sequences that varied in their content and an arrangement of cameras. The results of the experiments confirmed the increase of the depth maps quality - the quality of depth maps calculated with the proposed modification is higher than for the unmodified depth estimation method, apart from the number of the performed optimization cycles. Therefore, use of the proposed modification allows to estimate a depth of the better quality with almost 40% reduction of the estimation time. Moreover, the temporal consistency, measured through the reduction of the bitrate of encoded virtual views, was also considerably increased.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 3; 293-298
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring of the riverbed of river Dniester using GIS technologies
    Monitoring koryta rzeki Dniestr z wykorzystaniem technologii GIS
    Autorzy:
    Burshtynska, K.
    Halochkin, M.
    Tretyak, S.
    Zayats, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/130314.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Geodetów Polskich
    Tematy:
    channel processes
    monitoring
    flooding
    displacement of channels
    space image
    topographic maps
    procesy koryt rzecznych
    powodzie
    meandrowanie rzek
    zdjęcia satelitarne
    mapy topograficzne
    Opis:
    The paper analyses the causes of riverbeds shifts and meandering of Dniester. Among such reasons are mostly climatic, geographical and anthropogenic factors, such as frequent floods semi-stable rocks and soils, deforestation and removal of gravel and sand material from the river bed. The research is carried out on the lowland of the Dniester along the 100 km section over the 100 years period. Topographic maps (1910, 1923, 1976 years), and satellite images from Landsat 5 (1986) Landsat 7 (2000) Sentinel (2017) and special soil maps was taken as initial information. The Dniester meandering research shows significant correlation in horizontal riverbed movements for the periods from 1910 till 1986 and from 1984 till 2017. Correlation rate variate within the limits 0.97 – 0.99 respectively that corresponds to the almost full dependence in the riverbed displacement configuration. Beside that the maximum horizontal deviations can reached up to 800 meters. In addition, it was revealed that sediment processes caused significant increase in the area of the river islands from 1910 to 1976 by 2.4 times, and from 1976 to 2017 the island areas somewhat reduced. Nearly the largest island River channel is divided into two branches. Sinuosity coefficient is 2.3 over the test site. The analysis of soil maps shows prevailing bleached soils and loamy on alluvial deposits soils in areas with highest sinuosity coefficient.
    Za główne przyczyny przemieszczenia się i meandrowania koryta rzek uznaje się zjawiska klimatyczne, a także czynniki geograficzne i antropogeniczne. Częste powodzie, określone rodzaje skał i gruntów, wylesienia i wymywanie żwiru i piasku z łożyska powodują przemieszczenie rzeki. Prezentowane badania przemieszczeń dotyczą równinnej części rzeki Dniestr. Analiza została przeprowadzona na odcinku rzeki długości około 100 km i dotyczy okresu minionych 100 lat. Do badań wykorzystano mapy topograficzne z lat 1910, 1923, 1976 i zdjęcia satelitarne z satelity Landsat 5 (1986), Landsat 7 (2000) i Sentinel (2017), a także mapy gruntów. Z badań meandrowania rzeki Dniestr w okresach 1910-1986 i 1984-2017 określono związki korelacyjne między przemieszczeniami sytuacyjnymi, które wyrażone w formie współczynnika korelacji wynoszą odpowiednio 0.99 i 0.97, co świadczy o prawie całkowitym związku kształtów łożysk. Jednocześnie wyjaśniono że maksymalne przemieszczenia łożyska rzeki na odcinkach 1 i 2 wynoszą blisko 800 m, a na odcinku 5 do 100 m. Wyjaśniono, że zwiększenie niesionych osadów spowodowało w latach od 1910 do 1976 znaczny wzrost powierzchni wysp (około 2,4 razy), a w latach od 1976 do 2017 powierzchnia wysp zmniejszyła się, jednak w miejscu największej wyspy koryto podzieliło się na dwa rękawy. Ogółem krętość koryta na badanym fragmencie wynosi 2.3, co świadczy o tym że koryto jest meandrujące. Analiza mapy gruntów w miejscach maksymalnego meandrowania wskazuje, że głównymi typami gruntów są gleby łąkowe bielicowe i oglejone na złożach naniesionych.
    Źródło:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2017, 29; 25-36
    2083-2214
    2391-9477
    Pojawia się w:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geometric characteristics of Iraq’s raster topographic maps used for automatic updating the road network
    Autorzy:
    Abdallah, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/100558.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
    Tematy:
    maps update
    road networks segmentation
    topographic raster map
    tracking algorithm
    scanning algorithm
    methods of image binarization
    k-means method
    mapa
    mapa topograficzna
    aktualizacja
    Opis:
    This paper is devoted to the problem of road network extraction from raster image. The task of road network extraction is formulated in common view. The approach to the road map extraction has been proposed which can be applied for topographic map updating and is based on image clustering by k-means method and on application of scanning algorithm for extraction of road network fragments. Road map description is formed as set of linear fragments with knowing parameters. These linear fragments are created by merging of smaller parts. Experimental researches were implemented for maps of 10 Iraq cities. Experimental results show in average the extraction precision of 86% (in comparison with human expert).
    Źródło:
    Geomatics, Landmanagement and Landscape; 2015, 3; 7-18
    2300-1496
    Pojawia się w:
    Geomatics, Landmanagement and Landscape
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Probabilistic morphological modeling of hydrographic networks from satellite imagery using Self-Organizing Maps
    Autorzy:
    Zaremba, M.
    Palenichka, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/206609.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    łańcuch Markowa
    modelowanie morfologiczne
    odwzorowanie samoporządkujące
    satelitarne rozpoznawanie obrazów
    sieć neuronowa
    szkieletyzacja
    Markov chains
    morphological modeling
    neural networks
    satellite image processing
    self-organizing maps
    skeletonization
    Opis:
    Adequate and concise representation of the shape of irregular objects from satellite imagery is a challenging problem in remote sensing. The conventional methods for cartographic shape representation are usually inaccurate and will provide only a rough shape description if the description process is to be fully automated. The method for automatic cartographic description of water basins presented in this paper is based on Self-Organizing Maps (SOM) - a class of neural networks with unsupervised learning. So-called structured SOM with local shape attributes such as scale and local connections of vertices are proposed for the description of object shape. The location of each vertex of piecewise linear generating curves that represent skeletons of the objects corresponds to the position of a particular SOM unit. The proposed method makes it possible to extract the object skeletons and to reconstruct the planar shapes of sparse objects based on the topological constraints of generating lines and the estimation of local scale. A context-dependent vertex connectivity test is proposed to enhance the skeletonization process. The test is based on the Markov random chain model of vertices belonging to the same generating line and the Bayesian decision-making principle. The experimental test results using Landsat-7 images demonstrate the accuracy of the proposed approach and its potential for fully automated mapping of hydrological objects.
    Źródło:
    Control and Cybernetics; 2002, 31, 2; 343-369
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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