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Tytuł:
Use of very high resolution satellite imagery
Autorzy:
Jacobsen, K.
Powiązania:
https://bibliotekanauki.pl/articles/130521.pdf
Data publikacji:
2004
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
zdjęcia satelitarne
satelita Landsat
rozdzielczość zdjęć
satellite imagery
Landsat satelite
resolution photos
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2004, 14; 1-12
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the climate and human impact on the future survival of the Al-Sannya marsh in Iraq
Autorzy:
Hatem, Amal Jabbar
Al-Jasim, Ali Adnan N.
Abduljabbar, Hameed Majeed
Powiązania:
https://bibliotekanauki.pl/articles/2048498.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
climate change
human impact
Landsat 5
Landsat 8
maximum likelihood classification
south of Iraq
Opis:
The marshes are the most abundant water sources and ecological rich communities. They have a significant impact on the ecological and economic well-being of the communities surrounding them. However, climatic changes directly impact these bodies of water, especially those marshes which depend on rainwater and flooding for their survival. The Al-Sannya marsh is used as the example of marshes in Southern Iraq for this study between 1987-2017. The research takes place throughout the winter season due to the revival of marshes in southern Iraq at this time of year. The years 1987, 1990, 1995, 2000, 2007, 2014, 2017 are the focus of this study. Satellite imagery from the Landsat 5 (TM) and Landsat 8 (OLI) and the meteorological parameters affecting the marsh were acquired from NASA. The calculation of the areas of water bodies after classification using satellite imagery is done using the maximum likelihood method and comparing it with meteorological parameters. These results showed that these marshes are facing extinction due to the general change of climate and the interference of humans in utilising the drylands of the marsh for agricultural purposes. The vegetation area can be seen to have decreased from 51.15 km2 in 2000 to 8.77 km2 in 2017.
Źródło:
Journal of Water and Land Development; 2021, 51; 168-173
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the climate and human impact on the future survival of the Al-Sannya marsh in Iraq
Autorzy:
Hatem, Amal Jabbar
Al-Jasim, Ali Adnan N.
Abduljabbar, Hameed Majeed
Powiązania:
https://bibliotekanauki.pl/articles/2048508.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
climate change
human impact
Landsat 5
Landsat 8
maximum likelihood classification
south of Iraq
Opis:
The marshes are the most abundant water sources and ecological rich communities. They have a significant impact on the ecological and economic well-being of the communities surrounding them. However, climatic changes directly impact these bodies of water, especially those marshes which depend on rainwater and flooding for their survival. The Al-Sannya marsh is used as the example of marshes in Southern Iraq for this study between 1987-2017. The research takes place throughout the winter season due to the revival of marshes in southern Iraq at this time of year. The years 1987, 1990, 1995, 2000, 2007, 2014, 2017 are the focus of this study. Satellite imagery from the Landsat 5 (TM) and Landsat 8 (OLI) and the meteorological parameters affecting the marsh were acquired from NASA. The calculation of the areas of water bodies after classification using satellite imagery is done using the maximum likelihood method and comparing it with meteorological parameters. These results showed that these marshes are facing extinction due to the general change of climate and the interference of humans in utilising the drylands of the marsh for agricultural purposes. The vegetation area can be seen to have decreased from 51.15 km2 in 2000 to 8.77 km2 in 2017.
Źródło:
Journal of Water and Land Development; 2021, 51; 168-173
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring and forecasting spatio-temporal LULC for Akure rainforest habitat in Nigeria
Autorzy:
Aliyu, Yahaya A
Youngu, Terwase T.
Abubakar, Aliyu Z.
Bala, Adamu
Jesulowo, Christianah I.
Powiązania:
https://bibliotekanauki.pl/articles/1444929.pdf
Data publikacji:
2020
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
LULC
change detection
Landsat
Cellular Automata Markov model
Nigeria
wykrywanie zmian
program Landsat
model Markowa
automaty komórkowe
Opis:
For several decades, Nigerian cities have been experiencing a decline in their biodiversity resulting from rapid land use land cover (LULC) changes. Anticipating short/long-term consequences, this study hypothesised the effects of LULC variables in Akure, a developing tropical rainforest city in south-west Nigeria. A differentiated trend of urban LULC was determined over a period covering 1999–2019. The study showed the net change for bare land, built-up area, cultivated land, forest cover and grassland over the two decades to be -292.68 km2, +325.79 km2, +88.65 km2, +8.62 km2 and -131.38 km2, respectively. With a projected population increase of about 46.85%, the study identified that the built-up land cover increased from 1.98% to 48.61%. The change detection analysis revealed an upsurge in built area class. The expansion indicated a significant inverse correlation with the bare land class (50.97% to 8.66%) and grassland class (36.33% to 17.94%) over the study period. The study observed that the land consumption rate (in hectares) steadily increased by 0.00505, 0.00362 and 0.0687, in the year 1999, 2009 and 2019, respectively. This rate of increase is higher than studies conducted in more populated cities. The Cellular Automata (CA) Markovian analysis predicted a 37.92% growth of the study area will be the built-up area in the next two decades (2039). The 20-year prediction for Akure built-up area is within range when compared to CA Markov prediction for other cities across the globe. The findings of this study will guide future planning for rational LULC
Źródło:
Reports on Geodesy and Geoinformatics; 2020, 110; 29-38
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping and Assessment of Geological Lineaments with the Contribution of Earth Observation Data: A Case Study of the Zaer Granite Massif, Western Moroccan Meseta
Autorzy:
Zoraa, Noura
Raji, Mohammed
El Hadi, Hassan
Maimouni, Soufiane
Mhamdi, Hicham
Reddad, Aicha
Zahour, Ghalem
Ait-Yazza, Achraf
Powiązania:
https://bibliotekanauki.pl/articles/27314299.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
lineament extraction
Landsat 8
ASTER
Sentinel
Zaer
Opis:
The Zaer granitic massif is one of the most important Variscan granitoids in the Central Zone of the Western Moroccan Meseta. It is characterized by a deformation which is manifested by a network of fractures of different scales. Thanks to the technology currently available, many geological studies rely heavily on the mapping of geological lineaments, especially in structural geology. This has become more reliable with access to earth observation data using optical and radar sensors as well as the various remote sensing techniques. Therefore, the objective of this work is to determine the potential of Landsat 8, ASTER, Sentinel 2 and radar Sentinel 1 datasets using the automatic method to extract lineaments. Furthermore, this work focuses on quantitative lineament analysis to determine lineament trends and subsequently compare them with global and regional tectonic movement trends. The lineaments obtained through different satellite images were validated by including the shaded relief maps, the slope map, the correlation with the pre-existing faults in the geological maps as well as the field investigation. Comparison of these results indicates that Sentinel 1 imagery provides a better correlation between automated extraction lineaments and major fault zones. Thus, Sentinel 1 data is more effective in mapping geological lineaments. The final lineament map obtained from the VH and VV polarizations shows two major fault systems, mainly oriented NE-SW and NW-SE to NNW-SSE.
Źródło:
Geomatics and Environmental Engineering; 2023, 17, 5; 107--144
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Land surface temperature in Łódź obtained from Landsat 5TM
Autorzy:
Jędruszkiewicz, J.
Zieliński, M.
Powiązania:
https://bibliotekanauki.pl/articles/100751.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:
temperatura
powierzchnia Ziemi
LANDSAT 5TM
obrazowanie satelitarne
emisyjność
NDVI
land surface
temperature
Landsat 5TM
remote sensing
emissivity
Opis:
The main aim of this paper is to present the spatial differentiation of Land Surface Temperature LST in Łódź based on Landsat 5 Thematic Mapper (L5TM) images. Analysis was performed for all L5TM images from 2011, with clear sky over Łódź. Land surface temperature (LST) play an important role in determination of weather conditions in boundary layer of atmosphere, especially connected with convection. Environmental satellites from Landsat series delivers the high resolution images of Earth’s surface and according to the estimations made on the ground of it are precise. LST depends widely on surface emissivity. In this paper the emissivity was estimated from MODIS sensor as well as NDVI index, then both method were compared. The processed images allowed to determine the warmest and the coldest areas in the administrative boundaries of Łódź. The highest LST values has been found in industrial areas and the in the heart of the city. However, there are some places lying in city outskirts, where the LST values are as high, for instance Lodz Airport. On the contrary the lowest LST values occur mostly in terrains covered with vegetation i.e. forests or city parks.
Głównym celem tego opracowania było oszacowanie temperatury powierzchni Ziemi w Łodzi, na podstawie obrazów satelitarnych pochodzących z satelity Landsat 5 Thematic Mapper (L5TM). Analizę wykonane dla obrazów wszystkich dostępnych obrazów z 2011 roku, na których zachmurzenie nie wystąpiło nad obszarem Łodzi. Temperatura powierzchni Ziemi odgrywa istotną rolę w kształtowaniu warunków pogodowych w warstwie granicznej, szczególnie związanych z konwekcją. Satelity środowiskowe z serii Landsat dostarczają obrazów w dużej rozdzielczości, dzięki czemu pozwalają na stosunkowo dokładne oszacowanie tego parametru. Wielkość temperatury w dużym stopniu zależy od emisyjności danej powierzchni. W niniejszym opracowaniu porównano temperaturę powierzchniową obliczoną dla emisyjności wyznaczonej z danych spektrometru MODIS, umieszczonego na satelicie Terra, jak ró nież dla emisyjności oszacowanej przy wykorzystaniu wskaźnika NDVI obliczonego z danych L5TM. Opracowane obrazy satelitarne pozwoliły na wyznaczenie obszarów w Łodzi, cechujących się najwyższymi i najniższymi wartościami temperatury powierzchniowej. Najwyższe wartości LST na obszarze Łodzi występują w obszarach przemysłowych, jak również w najbardziej centralnej części miasta. Niekiedy jednakże obszary o podwyższonych wartościach LST spotykane są na przedmieściach, czego przykładem może łódzki port lotniczy. Z drugiej strony najniższe wartości LST występują w obszarach, na których występuje roślinność, przy czym dotyczy to głównie obszarów leśnych oraz parków śródmiejskich.
Źródło:
Contemporary Trends in Geoscience; 2012, 1, 1; 21-29
2299-8179
Pojawia się w:
Contemporary Trends in Geoscience
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integration of Aeromagnetic Data and Landsat Imagery for Structural Analysis: A Case Study of Awgu in Enugu State, South-Eastern, Nigeria
Autorzy:
Ijeh, B. I.
Ohaegbuchu, H. E.
Okpetue, P. C.
Powiązania:
https://bibliotekanauki.pl/articles/1112446.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aeromagnetic data
Awgu
Landsat
remote sensing
structural analysis
Opis:
In this study, digital format data comprising of aeromagnetic and remotely sensed (Landsat ETM+7) data were used for structural interpretation of the Awgu area (predominantly underlain by sedimentary rocks) in Enugu State, southeastern part of Nigeria. Aeromagnetic data were analyzed using the Oasis Montaj 7.5 software and interpretation was carried out by applying the vertical and horizontal gradients, analytical signal, reduction to pole, tilt depth, as well as Euler deconvolution. The total magnetic intensity map shows a magnetic signature ranging from -39nT to 129nT. The 3D Euler solution of the study area has a structural index of 1.0 with dyke/fault as the shape of the inferred geological structure. In the Landsat ETM+7 satellite data used, band 5 was found as the most suitable in (automatic) delineation. The automatic lineament extraction process was carried out utilizing the line module of PCI Geomatica (2015 version). The essence of analysis and interpretation of the Landsat ETM+7 was to determine the lineament trends and density across the area. Rockworks 16 version software was used to generate the rose diagrams. As a result of the work, the aeromagnetic and Landsat lineament maps of the study area were summarized using rose diagrams. This revealed NE-SW as the major trend with some secondary trends NW-SE, E-W and N-S directions. However, the NE-SW trend reflects the younger tectonic events, because the younger events are more pronounced and tend to obliterate the older events. In a comparison of the aeromagnetic and Landsat lineament extraction of the study area in terms of number of lineaments, directions and total length of lineaments, the Landsat imagery were found to be better than the number, directions and total length of the aeromagnetic data.
Źródło:
World News of Natural Sciences; 2018, 18, 2; 79-105
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of geomatic tools for the diachronic monitoring of landscape metrics in the northeastern algerian highlands, case of the city of Setif
Autorzy:
Kraria, Hocine
Zighmi, Karim
Chibani, Abdelmouhcene
Powiązania:
https://bibliotekanauki.pl/articles/2201671.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
LAUP
GIS
RS
PCA
Sentinel 2A
Landsat
Opis:
Geomatic tools could be used efficiently for urban development planning. The problem of the study lies in the extensive land use of terrains that are now suitable for heavy construction which slows down the development of new facilities. Furthermore, the authorities are forced to plan future settlements around Setif, at a distance of 8 to 12 kilometers from the city limits, threatening the long-term viability of construction and the ring of farmland that connects them to the core city. This must be done during the planning stage based on a diachronic analysis of all the natural and physical factors/parameters. The main objective of this research is to explore the application of landscape metrics to the analysis and monitoring of urban growth in the city of Setif, north-east of Algeria. For this purpose, our research paper uses Geographic Information System (GIS) and Remote Sensing (RS) techniques based on Principal Component Analysis (PCA) and the Angle Mapper Algorithm (SAM) target method for the analysis of urban land planning and sustainable urban planning of Setif. In the result of these analyses we propose suitability/buildability maps with more suitable construction sites. The research method is based on a 17-year time series dataset compiled from the Sentinel 2A and Landsat imagery between 2004 and 2021. Additionally, we used a cadastral Vs geotechnical overlay to estimate soil capacity. This work proves again that the integration of RS and GIS techniques allows for scientific identification of the lands suitable for urban development (LAUP).
Źródło:
Geomatics, Landmanagement and Landscape; 2022, 4; 67--79
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Geological Linear Structures of the Low Beskids – Assessment of Suitability of Landsat 8 Satellite Images and Products of the Image Processing
Wyznaczanie liniowych struktur geologicznych Beskidu Niskiego
Autorzy:
Kopciowski, K.
Pirowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/386066.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
lineamenty
Landsat 8
fotointepretacja
lineaments
photointerpretation
validity method
Opis:
W pracy przedstawiono wyniki wielowariantowego, fotointepretacyjnego wyznaczania liniowych struktur geologicznych, tzw. lineamentów, na obszarze Beskidu Niskiego z wykorzystaniem danych satelitarnych Landsat 8. Z uwagi na rozwój systemów obrazowania Ziemi oraz poszerzenie technicznych możliwości wzmacniania treści zobrazowań konieczna jest ponowna ocena przydatności metod wyznaczania lineamentów na obrazach satelitarnych. Oba wymienione czynniki mogą zwiększyć możliwości interpretacji wizualnej danych. W artykule podjęto próbę oceny, czy (a jeśli tak, to które) wybrane techniki wzmacniania obrazowania pozwalają zwiększyć ilość wydzieleń lineamentów, precyzyjniej wykryć ich przebieg, a ich wiarygodność potwierdzić na istniejących najnowszych opracowaniach geologicznych. We wprowadzeniu wyjaśniono problematykę lineamentów i kontrowersje z nimi związane. W skrócie przedstawiono fotointerpretację geologiczną w aspekcie litologii i tektoniki oraz opisano obszar badań pod kątem fotomorficznym i geologicznym. W części badawczej przygotowano zestawy zobrazowań służących do fotointerpretacji geologicznej. Wykonano takie operacje na danych Landsat, jak: progowanie, kwantyzacja, filtracje, selekcja kompozycji barwnych (wybrano KB 123, KB 234, KB 247 – numeracja wg kanałów systemów Landsat 5 i 7) oraz wagowanie międzykanałowe. Wyznaczono przebieg lineamentów niezależnie na każdym z zestawów danych. Przeprowadzono weryfikację wyznaczonych liniowych cech powierzchni terenu, opierając się na aktualnej wiedzy geologicznej zawartej w szczegółowych opracowaniach. Bazując na uzyskanych wynikach, opracowano autorską metodę oceny wiążącą uzyskane parametry ilościowe i jakościowe wydzieleń oraz łatwość pracy interpretatora. W ten sposób uzyskano ranking metod wzmacniania treści obrazów pod kątem ich przydatności w interpretacji geologicznej. Za najlepszy, komplementarny zestaw materiałów interpretacyjnych uznano wyniki wagowania międzykanałowego przedstawionego w formie kompozycji barwnej B: 2/4, G: 2/5, R: 3/5, KB 247 oraz kwantyzację kanału bliskiej podczerwieni.
The paper presents the results of validity of multi-dimensional photointerpretation assignation of linear geological structures, the so-called lineaments on the area of the Low Beskids on the basis of Landsat 8 satellite data. The methods of lineament determination on satellite images requires the re-evaluation of their suitability, due to the development of Earth image systems and the wider variety of technical possibilities to strengthen the content images. Both of these indicators may potentially influence the improvement of visual data interpretation. This paper raises an attempt to assess if, and if it is correct, which of the selected strengthening techniques of image make it possible to increase the number of lineament assignations, able to detect their progress more precisely and confirm their credibility in current geological studies. The introduction contains an explanation of lineaments and controversies which are related to them. It contains a brief presentation of geological photointerpretation in the aspect of lithology and tectonics and a description of the research area in terms of photomorphics and geology. The research part sets images which are used for geological photointerpretation. The following operations were conducted with the Landsat data: thresholds, quantization, filtration, selection of the coloured compositions (KB 123, KB 234, KB 247 were selected – numbering according to Landsat 5 and 7 channels systems) as well as inter-channel weighting. The course of the lineaments was determined independently on each of the datasets. Linear features of the surface were verified on the basis of current geological knowledge included in the detailed studies. On the basis of these results, the original evaluation method was prepared which connects the obtained quantitative and qualitative parameters of assignations and the ease of interpretation. The ranking of the methods which strengthen the content images in terms of their suitability in the geological interpretation was established. The results of inter-channel weighting were acknowledged as the best complementary set of interpretative materials and were presented in the form of B coloured composition: 2/4, G: 2/5, R: 3/5, KB 247 and quantization of the close infrared channel.
Źródło:
Geomatics and Environmental Engineering; 2015, 9, 4; 57-71
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rock type discrimination using Landsat-8 OLI satellite data in mafic-ultramafic terrain
Autorzy:
Tamilarasan, Kuppusamy
Anbazhagan, Siddan
Ranjithkumar, Sundararajan
Powiązania:
https://bibliotekanauki.pl/articles/27310138.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
remote sensing
Landsat-8
lithology
ultramafic
spectra
SVM classification
Opis:
The mafic-ultramafic terrain of the Bhavani complex in southern India is considered for lithological mapping. The Landsat-8 OLI satellite data was used for the interpretation of different rock types in the study area. The satellite data were digitally processed using ENVI 5.6 image processing software. In the OLI data, excluding bands 8 and 9, the remaining seven bands were used for the generation of colour composite images, band ratios, principal component analysis and SVM classification. Reflectance spectral measurements were carried out in laboratory conditions for five rock samples collected from the study area. The XRF analysis was carried out to estimate the composition of major oxides present in the rock samples. The results obtained from XRF analysis were compared with the rock spectra in characterizing the spectral features of the rock types. The colour composite images (B543, B567, B456, and B457), PCA composite image (PC312 and PC456), band ratios (BR5/5 and BR4/3), colour composite images from band ratios, and SVM classified output are useful in delineation various rock types in the terrain.
Źródło:
Geology, Geophysics and Environment; 2023, 49, 3; 281--298
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semiautomatic land cover mapping according to the 2nd level of the CORINE Land Cover legend
Autorzy:
Golenia, M.
Zagajewski, B.
Ochtyra, A.
Hościło, A.
Powiązania:
https://bibliotekanauki.pl/articles/92466.pdf
Data publikacji:
2015
Wydawca:
Oddział Kartograficzny Polskiego Towarzystwa Geograficznego
Tematy:
classification
Corine Land Cover
Landsat
artificial neural networks
Warsaw
Opis:
Actual land cover maps are a very good source of information on present human activities. It increases value of actual spatial databases and it is a key element for decision makers. Therefore, it is important to develop fast and cheap algorithms and procedures of spatial data updating. Every day, satellite remote sensing deliver vast amount of new data, which can be semi-automatically classified. The paper presents a method of land cover classification based on a fuzzy artificial neural network simulator and Landsat TM satellite images. The latest CORINE Land Cover 2012 polygons were used as reference data. Three satellite images acquired 21 April 2011, 5 June 2010, 27 August 2011 over Warsaw and surrounding areas were processed. As an outcome of classification procedure, the maps, error matrices and a set of overall, producer and user accuracies and a kappa coefficient were achieved. The classification accuracy oscillates around 76% and confirms that artificial neural networks can be successfully used for forest, urban fabric, arable land, pastures, inland waters and permanent crops mapping. Low accuracies were obtained in case of heterogenic land cover units.
Źródło:
Polish Cartographical Review; 2015, 47, 4; 203-212
2450-6974
Pojawia się w:
Polish Cartographical Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coastline change-detection method using remote sensing satellite observation data
Autorzy:
Markiewicz, Ł.
Mazurek, P.
Chybicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/331592.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
coastal monitoring
SAR
Sentinel
Landsat
background subtraction
image processing
Opis:
Coastal zones are not only the fundaments for local economics based on trade, shipping and transport services, but also a source of food, energy, and resources. Apart from offering diverse opportunities for recreation and tourism, coastal zones provide protection against storms and other meteorological disturbances. Environmental information is also essential because of the direct influence on a country’s maritime zones, which are territorial sea and exclusive economic zones. Keeping local communities and ecosystems healthy requires monitoring and assessing of all the vital changes of territorial sea and its baseline. The paper presents a method and a concept of a system that provides an efficient means of automatic analysis of spatial data provided by satellite observation systems (optical Landsat 8 and SAR Sentinel 1) in order to monitor, and detect, changes in the coastline. The proposed methodology is based on a set of algorithms that enable one to trace and detect changes in coastline shape, and eventual damage to marine infrastructure, such as breakwaters and harbours, relying on high resolution satellite observational products.
Źródło:
Hydroacoustics; 2016, 19; 277-284
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating four remote sensing based models to estimate latent heat flux in semi-arid climate for heterogeneous surface coverage of western Algeria
Autorzy:
Oualid, Tewfik A.
Hamimed, Abderahmane
Khaldi, Abdelkader
Powiązania:
https://bibliotekanauki.pl/articles/2174320.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
Algeria
energy balance
evapotranspiration
Landsat
METRIC
SPARSE
TIM
TSEB
Opis:
Optimal estimation of water balance components at the local and regional scales is essential for many applications such as integrated water resources management, hydrogeological modelling and irrigation scheduling. Evapotranspiration is a very important component of the hydrological cycle at the soil surface, particularly in arid and semi-arid lands. Mapping evapotranspiration at high resolution with internalised calibration (METRIC), trapezoid interpolation model (TIM), two-source energy balance (TSEB), and soil-plant-atmosphere and remote sensing evapotranspiration (SPARSE) models were applied using Landsat 8 images for four dates during 2014-2015 and meteorological data. Surface energy maps were then generated. Latent heat flux estimated by four models was then compared and evaluated with those measured by applying the method of Bowen ratio for the various days. In warm periods with high water stress differences and with important surface temperature differences, METRIC proves to be the most robust with the root-mean-square error (RMSE) less than 40 W∙m-2. However, during the periods with no significant surface temperature and soil humidity differences, SPARSE model is superior with the RMSE of 35 W∙m-2. The results of TIM are close to METRIC, since both models are sensitive to the difference in surface temperature. However, SPARSE remains reliable with the RMSE of 55 W∙m-2 unlike TSEB, which has a large deviation from the other models. On the other hand, during the days when the temperature difference is small, SPARSE and TSEB are superior, with a clear advantage of SPARSE serial version, where temperature differences are less important.
Źródło:
Journal of Water and Land Development; 2022, 55; 259--275
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remote sensing of eskers from Vormsi and Väinameri vicinity, northwestern Estonia
Autorzy:
Aber, J. S.
Kalm, V.
Powiązania:
https://bibliotekanauki.pl/articles/2059322.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Estonia
Palivere
landsat
esker
subglacial meltwater
ice lobe surge
Opis:
We have utilised techniques of remote sensing in combination with ground observations in order to investigate eskers of the Vormsi and Väinameri region of northwestern Estonia. Landsat Thematic Mapper (TM) images were the basis for recognition and regional interpretation of esker systems, and kite aerial photography was employed for detailed, low-height views of selected eskers. A special Landsat TM composite was developed to enhance the display of shallow sea floor features. On this basis, we have extended known, land-based eskers across the sea floor, and we have identified additional probable eskers marked by shallow shoals and tiny islands. The known and suspected eskers of Vormsi and surroundings demonstrate a regular pattern in their distribution, which we suggest represents a subglacial drainage network that was anastomosing in character. The esker network is located along the central pathway of the Väinameri ice lobe, and the overall direction of drainage was toward the Palivere glacial limit. We interpret eskers of the Vormsi-Väinameri vicinity as evidence for substantial meltwater discharge beneath the Väinameri ice lobe, which terminated in a proglacial lake.
Źródło:
Geological Quarterly; 2001, 45, 4; 365-372
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Tsunami on Mangrove Spatial Change in Eastern Coastal of Biak Island, Indonesia
Autorzy:
Hamuna, Baigo
Kalor, John Dominggus
Tablaseray, Vivia Elvanny
Powiązania:
https://bibliotekanauki.pl/articles/124873.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
tsunami
mangrove spatial change
Landsat satellite image
Biak Island
Opis:
This study was conducted to find out how large was the impact of the tsunami incident of 1996 on the mangrove spatial change and also to understand the distribution and level of mangrove density before and after tsunami in Biak Island (Oridek District and East Biak District), Biak Numfor Regency, Indonesia. In order to determine the condition of mangrove before tsunami, landsat 5 TM satellite image acquisition of July 6, 1994 and landsat 7 ETM+ satellite image acquisition of August 31, 2000 were used. The information about the distribution and extent of mangroves was obtained by analyzing the spectral values based on color composite image (RGB 453) and NDVI analysis. Overlay map of the result satellite image interpretation was used to learn the change of mangrove spatial extent area due to tsunami. The result showed that the mangrove area before the tsunami was 286.83 Ha (high density 36.63 Ha, medium density 140.60 Ha and small density 109.60 Ha), meanwhile the mangrove extent area after the tsunami was 102.51 Ha (high density 24.39 Ha, medium density 22,86 Ha and small density 55.26 Ha). The mangrove conditions before tsunami were crucial to the impact of mangrove area degradation directly. The change of mangrove spatial extent into two districts after tsunami occurred in 1996 amounts to 184.32 Ha, which it approximately 202.50 Ha mangrove being lost and the addition of mangrove in the new area are 18.18 Ha. The tsunami that occurred in 1996 affected the coastal ecosystems, especially the mangrove ecosystems in Oridek District.
Źródło:
Journal of Ecological Engineering; 2019, 20, 3; 1-6
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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