scholarly journals Built-up area analysis using Sentinel data in metropolitan areas of Transylvania, Romania

2021 ◽  
Vol 70 (1) ◽  
pp. 3-18
Author(s):  
Constantin Oșlobanu ◽  
Mircea Alexe
Keyword(s):  
Remote Sensing ◽  
Metropolitan Areas ◽  
Remote Sensing And Gis ◽  
Synthetic Aperture ◽  
Multispectral Images ◽  
Sar Images ◽  
Gis Applications ◽  
Wide Range ◽  
Thematic Information ◽  
Development Application

The anthropic and natural elements have become more closely monitored and analysed through the use of remote sensing and GIS applications. In this regard, the study aims to feature a different approach to produce more and more thematic information, focusing on the development of built-up areas. In this paper, multispectral images and Synthetic Aperture Radar (SAR) images were the basis of a wide range of proximity analyses. These allow the extraction of data about the distribution of built-up space on the areas with potential for economic and social development. Application of interferometric coherence and supervised classifications have been accomplished on various territories, such as metropolitan areas of the most developed region of Romania, more specifically Transylvania. The results indicate accuracy values, which can reach 94 per cent for multispectral datasets and 93 per cent for SAR datasets. The accuracy of resulted data will reveal a variety of city patterns, depending mainly on local features regarding natural and administrative environments. In this way, a comparison will be made between the accuracy of both datasets to provide an analysis of the manner of built-up areas distribution to assess the expansion of the studied metropolitan areas. Therefore, this study aims to apply well-established methods from the remote sensing field to enhance the information and datasets in some areas lacking recent research.

scholarly journals A Novel Orthogonal Waveform Separation Scheme for Airborne MIMO-SAR Systems

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3580 ◽  
Author(s):  
Jie Wang ◽  
Ke-Hong Zhu ◽  
Li-Na Wang ◽  
Xing-Dong Liang ◽  
Long-Yong Chen
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Synthetic Aperture Radar ◽  
3D Imaging ◽  
Synthetic Aperture ◽  
Separation Scheme ◽  
Sar Images ◽  
Wide Swath ◽  
Aperture Radar

In recent years, multi-input multi-output (MIMO) synthetic aperture radar (SAR) systems, which can promote the performance of 3D imaging, high-resolution wide-swath remote sensing, and multi-baseline interferometry, have received considerable attention. Several papers on MIMO-SAR have been published, but the research of such systems is seriously limited. This is mainly because the superposed echoes of the multiple transmitted orthogonal waveforms cannot be separated perfectly. The imperfect separation will introduce ambiguous energy and degrade SAR images dramatically. In this paper, a novel orthogonal waveform separation scheme based on echo-compression is proposed for airborne MIMO-SAR systems. Specifically, apart from the simultaneous transmissions, the transmitters are required to radiate several times alone in a synthetic aperture to sense their private inner-aperture channels. Since the channel responses at the neighboring azimuth positions are relevant, the energy of the solely radiated orthogonal waveforms in the superposed echoes will be concentrated. To this end, the echoes of the multiple transmitted orthogonal waveforms can be separated by cancelling the peaks. In addition, the cleaned echoes, along with original superposed one, can be used to reconstruct the unambiguous echoes. The proposed scheme is validated by simulations.

scholarly journals Integrated Remote Sensing and GIS Applications for Sustainable Watershed Management: A Case Study from Cyprus

10.5772/39307 ◽  
2013 ◽  
Author(s):  
Diofantos G. ◽  
Dimitrios D. ◽  
Athos Agapiou ◽  
Kyriacos Themistocleous ◽  
Silas Michaelides ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Watershed Management ◽  
Remote Sensing And Gis ◽  
Gis Applications

scholarly journals Remote Sensing and GIS Applications in Sustainability

2020 ◽  
pp. 605-626
Author(s):  
Manish Kumar Goyal ◽  
Ashutosh Sharma ◽  
Rao Y. Surampalli
Keyword(s):  
Remote Sensing ◽  
Remote Sensing And Gis ◽  
Gis Applications

scholarly journals Remote sensing and gis applications in determining shoreline and surface water quality changes in Bayelsa state, Nigeria

1970 ◽  
Vol 10 (5) ◽  
pp. 572-587
Author(s):  
A.O. Adebola ◽  
T.H.T Ogunribido ◽  
S.A. Adegboyega ◽  
M.O. Ibitoye ◽  
A.A Adeseko
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Surface Water ◽  
Landsat Imagery ◽  
Surface Water Quality ◽  
Remote Sensing And Gis ◽  
Shoreline Changes ◽  
Gis Applications ◽  
Gis Environment ◽  
Coastal Landform

The study of shoreline changes is essential for updating the changes in shoreline maps and management of natural resources as the shoreline is one of the most important features on the earth’s surface. Shorelines are the key element in coastal GIS that provide information on coastal landform dynamics. The purpose of this paper is to investigate shoreline changes in the study area and how it affects surface water quality using Landsat imagery from 1987 to 2016. The image processing techniques adopted involves supervised classification, object-based image analysis, shoreline extraction and image enhancement. The data obtained was analyzed and maps were generated and then integrated in a GIS environment. The results indicate that LULC changes in wetland areas increases rapidly during the years (1987-2016) from 34.83 to 38.96%, vegetation cover reduces drastically through the year which range from 30% to 20%. Polluted surface water was observed to have decreased from 30% to 20% during 1984-2010 and reduced by about 3% in 2016. In addition, the result revealed the highest level of erosion from 1987 to 2016 which is -49.60% against the highest level of accretion of 13.39% EPR and NSM -1400 erosion against 350 accretions. It was also observed that variations in shoreline changes affect the quality of surface water possibly due to shoreline movement hinterland. This study has demonstrated that through satellite remote sensing and GIS techniques, the Nigerian coastline can adequately be monitored for various changes that have taken place over the years.Key Words: Shoreline, Remote Sensing, Erosion, Accretion, GIS 

scholarly journals Advances in remote sensing and GIS applications in support of forest fire management

2014 ◽  
Vol 23 (5) ◽  
pp. 603 ◽  
Author(s):  
Ioannis Z. Gitas ◽  
Jesús San-Miguel-Ayanz ◽  
Emilio Chuvieco ◽  
Andrea Camia
Keyword(s):  
Remote Sensing ◽  
Forest Fire ◽  
Fire Management ◽  
Remote Sensing And Gis ◽  
Gis Applications ◽  
Forest Fire Management

Remote sensing and gis applications in the identification of aquaculture hotspots at village level

2003 ◽  
Vol 31 (2) ◽  
pp. 71-80 ◽  
Author(s):  
K. Nageswara Rao ◽  
G. Murali Krishna ◽  
D. Ramprasad Naik ◽  
B. Hema Malini
Keyword(s):  
Remote Sensing ◽  
Remote Sensing And Gis ◽  
Village Level ◽  
Gis Applications

scholarly journals Remote Sensing and GIS based site suitability analysis for tourism development in Vaishali block, Bihar

2021 ◽  
Vol 15 (2) ◽  
pp. 12-22
Author(s):  
Rajesh Jayaraman ◽  
B.Santhosh Kumar ◽  
Sudhir Kumar Singh
Keyword(s):  
Remote Sensing ◽  
Information Systems ◽  
Geographic Information Systems ◽  
Tourism Development ◽  
Remote Sensing And Gis ◽  
Suitability Analysis ◽  
Force Factor ◽  
Gis And Remote Sensing ◽  
Gis Applications ◽  
Travel Industry

Geographic Information Systems (GIS) and Remote Sensing are presently recognized generally as an improve instrument for overseeing, breaking down, and showing gigantic volumes of fluctuated information suitable to numerous neighborhood and provincial arranging exercises. Because of the composite idea of the travel industry arranging issues, the planned of GIS in settling these issues is progressively perceived. This paper will think a portion of the conceivable outcomes of GIS applications in the travel industry arranging. For the most part, GIS applications in the travel industry have been tight to recreational office stock, the travel industry situated land the board, and diversion untamed life strife; and have been thin by absence of financing, and awkward techniques. Utilizing the case of site wellness investigation for the travel industry improvement and mapping, this paper features a few uses of GIS in the travel industry arranging in vaishali square, Bihar. According to our present investigation; the most reasonable the travel industry site recognized by the examination is inside significant towns. The urban focus with plausibility to develop into the travel industry focuses. The rest of the land shows a low appropriateness scale because of absence of significant appreciation for make a solid force factor. Availability is an essential for the travel industry advancement. Great street organize availability with closeness to railroads station or air terminal demonstrated solid vacationer potential site, this combined with proximity to grand magnificence delineates high appropriateness. Significant vacation destinations, for example, legacy locales, gardens and water bodies or lake demonstrated high appropriateness. This can be corresponded to the way that legacy destinations and other high appropriate highlights are converted into reasonable the travel industry site.

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