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4602.2 - An automated shoreline extraction approach using RASAT MS and SENTINEL 1A SAR images

Tuesday, July 4
3:10 PM - 3:30 PM
Location: Delaware B

Shorelines Shorelines are complex ecosystems and highly important socio-economic environments. They may change rapidly due to both natural and human-induced effects. Determination of movements along the shoreline and monitoring of the changes are essential for coastline management, agriculture, decision support systems etc. Remote sensing enables to obtain rapid, up-to-date and reliable information for monitoring of shoreline. Antalya-Kemer shoreline has been selected for evaluation and testing of the methods which will be used for the research project, about shoreline extraction with use of UAV-Based LIDAR data in the region of Terkos-Istanbul, which supported by TUBITAK( The Scientific and Technological Research Council of Turkey) with project nr. 115Y718. Selected shoreline is about 120 km. The coastline is under threat of erosion, deposition, increasing of inhabitants, urbanisation and touristic hotels. Human based and natural factors provoke notable changes along the coastal zone. RASAT earth observation satellite was designed and developed by TÜBİTAK Space Technologies Research Institute (TÜBİTAK UZAY) to provide high resolution imagery. RASAT was launched on August 17, 2011. Geomet-ric resolution of panchromatic (420 – 730 nm) and multispectral (R(580 – 730 nm), G(550 – 580 nm) ,B(420 -550 nm)) sensors are 7.5 m and 15 m respectively. Radiometric resolution of RASAT images is 8 bit, temporal resolution of the satellite is 4 days with 30 km swat with. In this study, RASAT image was used which was taken on 31.08.2016 and SENTINEL image was taken also in the same month. SENTINEL 1A has SAR sensor which has C band, and provides imagery with 10 m spatial resolution in GRD format. In this study, an integrated shoreline extraction method has been proposed. In the first step of the study, particle swarm optimization method was applied to pan-chromatic RASAT band to extract of Antalya-Kemer shoreline. Particle Swarm Optimization method segments the image with consideration of the candidates’ quality. Each candidate is moved and the position and velocity of the candidates are measured. In the algorithm, the best candidate position gives the best score for the quality. In the second step, the SAR image was processed. Firstly, this image was pre-processed to reduce the speckle and terrain-corrected with use of SRTM digital terrain model. Fuzzy method was performed to separate the land and coastal pixels. The necessary parameters; standard deviation, mean and median were calculated to use in the fuzzy approach. Mean-standard deviation method was selected since the large amounts of land and sea pixels dominate the SAR image with large mean and standard deviation values.Obtained results have been evaluated with manual-ly created vector data-set. The accuracy assessment was performed by calculating of the perpendicular distances to the reference data. As a result, the mean differences were calculated around 1 pixel for the results from both RASAT and SENTINEL SAR data. These indicate that the both data-sets have satisfactory performance for monitor-ing the coastlines in accuracy of their spatial resolution level. This gives an opportunity to monitor and manage the shorelines in timely with much more flexibility. In the future studies, it is planned to combine both data-sets to increase the quality of the results.

Dursun Zafer Seker

Prof.Dr.
Istanbul Technical University

Prof.Dr. Dursun Zafer Seker has a Ph.D. in Geomatics from the Istanbul Technical University (ITU) Turkey. He was in UK, University of Newcastle upon Tyne for his postdoctoral studies. He is currently full Professor at the Istanbul Technical University, Department of Geomatics Engineering (since 2004), after being Associate Professor at the same department (1998 -2004). His expertise is on photogrammetry, remote sensing, coastal zone management, watershed management and spatial data modelling and analysis from both the theoretical and empirical viewpoint. In these fields, he has been involved into several research projects both national and international, where these projects were inter-disciplinary.

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Nusret Demir

Assist.Prof.
Akdeniz University

Presenter : Prof.Dr. Dursun Zafer Seker
Istanbul Technical University, Geomatics Engineering

He is working at the Istanbul technical University since 1986. He worked at several universities as visitor, eg.Mary Washington College,University of Newcastle upon Tyne, Department of Surveying, Stuttgart University, Japan Gifu University,
He is member of several international organisations, ACSM - American Congress on Surveying and Mapping, National Society of Professional Surveyors., IWA,MESAEP

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Selen Oy

MsC Student
Akdeniz University

She is master student at Akdeniz University, Dept.of Space Science and Technologies

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Abdulkadir Ince

Msc. Student
Yildiz Technical University

MsC student at Yildiz Technical University, Dept. of Geomatics Engineering.

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Mustafa Ogurlu

Phd student
Yildiz Tecnical University

Phd student at Yildiz Tecnical University, dept. of Geomatics Engieering

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Salih Bozkurt

Msc. student
Yildiz Technical university

Msc student at Yildiz Technical University, Dept. of Geomatics Engineering

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Bulent Bayram

Prof.Dr.
Yildiz Technical University

Bülent Bayram is currently Professor in the Department of Geomatics, Yildiz Technical University, Istanbul-Turkey. He received his BS degree from Department of Geodesy and Photogrammetry Engineering, Black Sea Technical University, Trabzon-Turkey in 1987. He got his MS and PhD degrees from Geodesy and Photogrammetry Engineering Department of Yildiz Technical University, Istanbul-Turkey in 1990 and 1998 respectively. He worked as Research Assistant between 1991 and 2000 at Department of Geomatics, Yildiz Technical University. He worked at the same department as Assistant Professor between 2000 and 2009. He worked as Associate Professor between 2009-2014. Since then, he is currently working as Professor at the same department.

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Guillaume Touya

Senior Researcher
IGN France, LASTIG, COGIT team

Guillaume Touya is a senior researcher at the LASTIG, COGIT team, IGN France (the French mapping agency). He holds a PhD in GI science from Paris-Est University. His research interests focus on automated cartography, map generalization and volunteered geographic information. He currently leads the MapMuxing (https://mapmuxing .ign.fr) research project.

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