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Wyszukujesz frazę "hill-shading" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Opracowanie i redakcja średnioskalowej mapy topograficznej obszaru górskiego w środowisku ArcInfo
Preparation of a Middle-Scale Topographic Map of Mountainous Area in ArcInfo Environment
Autorzy:
Jancewicz, K.
Krupski, J.
Powiązania:
https://bibliotekanauki.pl/articles/204422.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
redakcja map ogólnogeo-graficznych
cieniowanie
rysunek skał
GIS
ArcInfo
general maps compilation
hill-shading
rock drawing
Opis:
W artykule przedstawiono przykład zastosowania oprogramowania ArcInfo do redagowania mapy. Przybliżono problematykę wyboru i sposobu wykorzystania danych źródłowych, prezentacji rzeźby terenu w trakcie opracowania średnioskalowej mapy topograficznej przeznaczonej do wydruku.
In 2010 an expedition to the massif of Belukha in the Altai (4506 m a.s.l.) in Kazakhstan was organized. A topographic map in the scale of 1:100,000 had been prepared for the expedition. Ali the editorial works were performed in the environment of GIS ArcInfo package, which had been considered the most advanced in applied cartographic tools. The first version of the map had been verified in Altai and in 2011 a new version was elaborated, which mainly improved relief by addi-tion of rock drawing and modified shading. The map was prepared in 'WGS-84' coordinate system and UTM projection basing on Soviet topographic maps in '1942' coordinate system (downloaded from the Internet) and satellite images from LandsatTM and ETM+. Satellite images were used to update buildings, forests, roads, water-beds and main forms of high-mountain rock relief. ASTER GDEM and SRTM digital terrain models were also used, but their quality was not satisfactory. As a result an original terrain model in 25 m resolution was prepared, basing on vectorized contourlines and other necessary relief elements extracted from topographic maps using ANUDEM algorithm. All the elements of map contents mentioned above were prepared in ArcInfo, with input data not organized into one common database, but rather placed in a layer structure (*lyr files). Rock drawings could not be executed in ArcInfo package (ArcMap module), therefore they were done manually using satellite images. Rock drawings were adjusted to the location of mountain ridges determined basing on topographic maps. The drawing was then scanned, processed graphically in Adobe Photoshop, geo-referred and added to the map. Shading was generated from the original terrain model, detailed to follow the contourlines, modified and retouched in Photoshop, adapting the details to rock drawings and contourlines' location. The presented process of preparation of a middle-scale topographic map shows that the newest version of ArcInfo package (9.3.1) has a lot of potential for map editing, starting from data preparation to the final map. However, for particular features and forms of relief, manual involvement using other vector and raster graphic editors is necessary.
Źródło:
Polski Przegląd Kartograficzny; 2012, T. 44, nr 1, 1; 30-45
0324-8321
Pojawia się w:
Polski Przegląd Kartograficzny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating the perceived visual complexity of multidirectional hill-shading
Autorzy:
Tzelepis, Nikolaos
Kaliakouda, Alexandra
Krassanakis, Vassilios
Misthos, Loukas-Moysis
Nakos, Byron
Powiązania:
https://bibliotekanauki.pl/articles/1836648.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wizualizacja graficzna
ocena krajobrazu
ocena ekspercka
multidirectional hill-shading
visual complexity
eye movement analysis
expert judgement process
Opis:
Eye tracking recordings could reveal the visual behavior for different cartographic visualization techniques, such as hill-shading, while at the same time eye tracking metrics (ETMs) can summarize the associated complexity levels in a concise and quantitative manner. In the present study, three different hill-shading methods, including:(i) the standard method based on ideal diffuse reflection, (ii) the Multidirectional ObliqueWeighted method – MDOW and (iii) the combination of a MDOW’s variation with standard hill-shading, are evaluated and ranked in terms of their perceived visual complexity. The performed examination is based on both eye tracking techniques and expert judgement procedures. A weighted combination of basic ETMs has been used, implemented by the Landscape Rating Index – LRI. The weights resulted from an experts’ judgement process where the opinions of experts in geoinformatics, cartography, geovisualization, experimental psychology, cognitive science, neuroscience and eye tracking were analyzed. Fifteen (15) individuals participated in an eye tracking experiment with hill-shading images produced by the three methods under evaluation, while 41 experts participated in an online questionnaire in order to collect all the analysis data. The final evaluation was based on the computation of three LRI models. The outcomes indicate that implementing hill-shading with more than one light sources results in similar perceptual behaviors, allowing for a seamless exploitation of the advantages of using multidirectional illumination.
Źródło:
Geodesy and Cartography; 2020, 69, 2; 161-172
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid MPPT algorithm for PV systems under partially shaded conditions using a stochastic evolutionary search and a deterministic hill climbing
Autorzy:
Basiński, K.
Ufnalski, B.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/1193446.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
maximum power point tracking
photovoltaic system
hybrid part-stochastic part-deterministic search rule
particle swarm optimization (PSO)
partial shading
hill climbing
Opis:
A hybrid maximum power point tracking method has been proposed for the photovoltaic system using a stochastic evolutionary search and a deterministic hill climbing algorithm. The proposed approach employs the particle swarm optimizer (PSO) to solve a dynamic optimization problem related to the control task in a PV system. The position of the best particle is updated by the hill climbing algorithm, and the position of the rest of the particles by the classic PSO rule. The presented method uses the re-randomization mechanism, which places five consecutive particles randomly, but in specified intervals. This mechanism helps track the maximum power point under partially shaded conditions.
Źródło:
Power Electronics and Drives; 2017, 2, 37/2; 49-59
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
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