Şenol Kutoğlu | Zonguldak Bülent Ecevit University (original) (raw)

Papers by Şenol Kutoğlu

Research paper thumbnail of İnsansız Sualtı Aracı Hareketinin Kalman Filtre İle Kestirimi ve Makine Öğrenmesi ile İyileştirilmesi

International Journal of Advances in Engineering and Pure Sciences

The aim of the study was to assess the antibody response to the ChAdOx1-nCoV vaccine in individua... more The aim of the study was to assess the antibody response to the ChAdOx1-nCoV vaccine in individuals who were not previously infected by COVID-19. Patients and Methods: All people aged 18-65 years who received their first vaccination with ChAdOx1-nCoV from March to May 2021 were approached for inclusion. Individuals with sufficient antibody titers against SARS-CoV-2 infection before vaccination were considered previously infected and were excluded from the analysis. We observed viral spike protein RBD-S1-specific IgG antibody levels at day 28 of the first dose of vaccination and day 14 of the second dose of vaccination (74 days from index vaccination). An optical density ratio (ODR) of >1.1 was considered to have a positive antibody response, 0.8 to 1.1 borderline and <0.8 was denoted as negative. Informed consent was ensured before enrollment, and ethical principles conformed with the current Declaration of Helsinki. Results: This observational study comprised 769 infection-naïve individuals (mean age 40.5 years, 38.9% female). Spike-specific IgG antibody responses elicited after the first and second doses of vaccine were 99.9% and 100%, respectively. The median ODR was 5.43 (interquartile range [IQR]: 4.32-6.98) and 10.90 (IQR 9.02-11.90) after the first and second doses. Higher age was associated with lower antibody levels after both dosages. However, no sex-specific variation was seen. People with comorbidity had a lower antibody level after the second dose. Tenderness (51.46%) and fever (19.30%) were the most common local and systemic side effects after vaccination. Conclusion: This study was one of the earlier attempts in the country to assess the antibody response to ChAdOx1-nCoV vaccine recipients. The results imply that general people should be encouraged to take the vaccine at their earliest.

Research paper thumbnail of Improvement of Filter Estimates Based on Data from Unmanned Underwater Vehicle with Machine Learning

2020 Innovations in Intelligent Systems and Applications Conference (ASYU), 2020

In this study, the mathematical model of unmanned underwater vehicle is obtained in 6 DOF. The na... more In this study, the mathematical model of unmanned underwater vehicle is obtained in 6 DOF. The navigation sensor data are generated from mathematical model response. Extended Kalman filer and Unscented Kalman filter is applied to estimate noisy sensor data. For the EKF, nonlinear model is linearized around the equilibrium points. For the UKF, nonlinear system model is used. The estimation performance of EKF and UKF are compared. Estimation has been improved by applying support vector machine algorithm, which is machine learning, for unscented Kalman filter estimates. All this study is modeled in MATLAB/Simulink and PYTHON environment.

Research paper thumbnail of Correlation between INS and GPS Based on Sea Surface Vehicle Motion

2020 Innovations in Intelligent Systems and Applications Conference (ASYU), 2020

The Global Positioning System (GPS) and integrated sonar systems are widely used for obtaining ba... more The Global Positioning System (GPS) and integrated sonar systems are widely used for obtaining bathymetric data. While the water vehicle coordinates can be provided with real-time kinematic (RTK) GPS observations instantaneously, depth information can be obtained through integrated sonar systems. The oscillation caused by factors such as wind and wave affects the position accuracy of bathymetric data. In this study, performance analysis was performed by using an inertial navigation system (INS) together with more than one GPS receiver to test the angular changes caused by the oscillation of the boat, in case of bathymetric operation with unmanned water vehicle. While there is a weak correlation between angular changes obtained from the RTK GPS method and INS in case of low boat oscillation, high correlation of approximately 99% in pitch and roll angles has been found if oscillation increases.

Research paper thumbnail of Recent Sea Level Change in the Black Sea from Satellite Altimetry and Tide Gauge Observations

ISPRS International Journal of Geo-Information, Mar 24, 2020

Research paper thumbnail of Uzaktan Algılama Teknolojisi ve Uydu Görüntüleri Yardımıyla Önemli Çevresel (Su Ve Kara Yüzeyi) Etkilerin Gözlemlenmesi

Küresel ısınma, sanayileşme ve insanoğlunun çevremizi çok fazla etkilediği günümüz koşullarında, ... more Küresel ısınma, sanayileşme ve insanoğlunun çevremizi çok fazla etkilediği günümüz koşullarında, bu etkilerin belirlenmesi, izlenmesi ve kontrolü insan yaşamı ve sağlığı bakımından önemli bir yer tutmaktadır. Çevresel etkilerin izlenmesi için birçok yöntem mevcuttur. Bu çalışmada, uzaktan algılama teknolojisi yardımıyla işlenen uydu görüntüleri ile önemli çevresel etkilerin nasıl gözlemlendiği ele alınmıştır. Bu etkilerin gözlenmesinde hangi yöntemlerin kullanıldığı ve yöntemlerin etkinliği üzerine bilgiler verilmiştir. Uzaktan algılama birçok alanda çok iyi sonuçlar vermektedir. Araştırma sonucunda uzaktan algılama teknolojisinin önemli çevresel değişimlerin gözlemlenmesi açısından da etkili bir yöntem olduğu ortaya konmuştur.

Research paper thumbnail of Evaluation of spatio-temporal variability in Land Surface Temperature: A case study of Zonguldak, Turkey

Environmental Monitoring and Assessment, 2015

The aim of this study is to analyze spatio-temporal variability in Land Surface Temperature (LST)... more The aim of this study is to analyze spatio-temporal variability in Land Surface Temperature (LST) in and around the city of Zonguldak as a result of the growing urbanization and industrialization during the last decade. Three Landsat 5 data and one Landsat 8 data acquired on different dates were exploited in acquiring LST maps utilizing mono-window algorithm. The outcomes obtained from this study indicate that there exists a significant temperature rise in the region for the time period between 1986 and 2015. Some cross sections were selected in order to examine the relationship between the land use and LST changes in more detail. The mean LST difference between 1986 and 2015 in ERDEMIR iron and steel plant (6.8 °C), forestland (3 °C), city and town centers (4.2 °C), municipal rubbish tip (-3.9 °C), coal dump site (12.2 °C), and power plants&amp;amp;amp;amp;#39; region (7 °C) were presented. In addition, the results indicated that the mean LST difference between forestland and city centers was approximately 5 °C, and the difference between forestland and industrial enterprises was almost 8 °C for all years. Spatio-temporal variability in LST in Zonguldak was examined in that study and due to the increase in LST, policy makers and urban planners should consider LST and urban heat island parameters for sustainable development.

Research paper thumbnail of Taşkömür Havzasindaki̇ Tasman Oluşumlarinin Yeryüzü Üzeri̇ndeki̇ Etki̇leri̇ni̇n CBS İle Beli̇rlenmesi̇

Madencilik, ulke ekonomisine olumlu katki saglamasina ragmen, uretimin gerceklestigi sahanin uzer... more Madencilik, ulke ekonomisine olumlu katki saglamasina ragmen, uretimin gerceklestigi sahanin uzerinde yada yanindaki yerlesim alanlari tasman tehlikesi altindadir. Madencilik tasmani, yer alti uretiminden dogan zemin ici hareketlerinin yeryuzundeki etkisidir. Bu nedenle etki alanindaki alan uzerinde ve icinde bulunan yollar, tuneller, yer alti galerileri, maden kuyulari, binalar, santraller, barajlar, su, gaz, elektrik, kanal ve kanalizasyon hatlarinin, isletmelerin, kentlerin ve ulkenin surdurulebilir yasami acisindan buyuk onemi bulundugundan etki alanlarinin belirlenmesi gereklidir. Bu calismada, Zonguldak Taskomur havzasi kozlu uretim bolgesinde gerceklestirilen yeralti madencilik faaliyeti sonucunda yer yuzeyinde olusan tasman etki alanlarinin Python programlama dilinde bilgisayar kodlari gelistirilerek ArcGIS yazilimina entegre edilmesi ile hesaplanmasi amaclanmistir.

Research paper thumbnail of Analysing the Effects of Different Land Cover Types on Land Surface Temperature Using Satellite Data

Monitoring Land Surface Temperature (LST) via remote sensing images is one of the most important ... more Monitoring Land Surface Temperature (LST) via remote sensing images is one of the most important contributions to climatology. LST is an important parameter governing the energy balance on the Earth and it also helps us to understand the behavior of urban heat islands. There are lots of algorithms to obtain LST by remote sensing techniques. The most commonly used algorithms are split-window algorithm, temperature/emissivity separation method, mono-window algorithm and single channel method. In this research, mono window algorithm was implemented to Landsat 5 TM image acquired on 28.08.2011. Besides, meteorological data such as humidity and temperature are used in the algorithm. Moreover, high resolution Geoeye-1 and Worldview-2 images acquired on 29.08.2011 and 12.07.2013 respectively were used to investigate the relationships between LST and land cover type. As a result of the analyses, area with vegetation cover has approximately 5 ºC lower temperatures than the city center and ar...

Research paper thumbnail of Kuzey Anadolu Fayinin Bolu -Yeniçağa Geçişindeki Tektonik Hareketlerinin GPS Gözlemleri İle İncelenmesi The investigation of tectonic movements in the Bolu-Yeniçağa segment of the North Anatolian Fault Zone with the aid of GPS observations

In this study, a summary of researches between January 1996 end September 1999 of the project car... more In this study, a summary of researches between January 1996 end September 1999 of the project carried out in Bolu-Yeniçağa by Depertment of Geodesy end Photogrammetry Engineering of Zonguldak Karaelmas University which the project is named "monitoring of surface displacement in the Western Black Sea Region" are presented. GİRİŞ Günümüzde tektonik kaynakli yer kabuğu hareketlerinin belirlenmesi, kita (anakara) hareketleri ve

Research paper thumbnail of Distributed GIS for Smart Cities : ArcGIS for Sustainable Society

There is a big need for spatially referenced data creation, analysis and management. Some of the ... more There is a big need for spatially referenced data creation, analysis and management. Some of the salient points that this research would be able to definitely contribute are facilitating the creation, sharing, and collaborative use of geospatial data. The objective is development of an automated natural hazard zonation system with Internet-SMS warning utilizing geomatics for sustainable societies. At present no web-enabled warning system exists which can disseminate warning after hazard evaluation at one go and in real time. The functionality is to be modular in architecture having GIS-GUI, input, understanding, rainfall prediction, expert, output, and warning modules. Through this paper a significantly enhanced system integrated with Web-enabled-geospatial information has been proposed, and it can be concluded that an automated hazard warning system has been conceptualized and researched. However, now the scope is to develop it further.

Research paper thumbnail of Distributed GIS for automated natural hazard zonation mapping Internet-SMS warning towards sustainable society

Cogent Engineering, 2014

Today, open systems are needed for real time analysis and warnings on geo-hazards and over time c... more Today, open systems are needed for real time analysis and warnings on geo-hazards and over time can be achieved using Open Source Geographical Information System (GIS)-based platform such as GeoNode which is being contributed to by developers around the world. To develop on an open source platform is a very vital component for better disaster information management as far as spatial data infrastructures are concerned and this would be extremely vital when huge databases are to be created and consulted regularly for city planning at different scales, particularly satellite images and maps of locations. There is a big need for spatially referenced data creation, analysis, and management. Some of the salient points that this research would be able to definitely contribute with GeoNode, being an open source platform, are facilitating the creation, sharing, and collaborative use of geospatial data. The objective is development of an automated natural hazard zonation system with Internet-short message service (SMS) warning utilizing

Research paper thumbnail of Evaluation of GOCE-Based Global Geopotential Models Versus EGM2008 and GPS/Levelling Data in Northwest of Turkey

International Association of Geodesy Symposia, 2015

Research paper thumbnail of Geometric correction accuracy of different satellite sensor images: application of figure condition

International Journal of Remote Sensing, 2007

ABSTRACT In this study, the figure condition method was introduced to analyse the accuracy of geo... more ABSTRACT In this study, the figure condition method was introduced to analyse the accuracy of geometric correction. Figure condition denotes the transformation ability of estimated model parameters for a given transformation model, and it can be used in a geometric correction procedure. To study the figure condition, multisensor satellite images were geometrically corrected using ground control points obtained by different methods. The accuracy of each geometric model was analysed by means of the root mean square error of unit weight and variance–covariance matrix of unknown parameters. Then, an error propagation law was applied to the geometric model in order to investigate the transformation ability of the model parameters and estimate error values of geometric correction for the whole image surface. The results of the research demonstrated that the figure condition can be applied to geometric correction, and error values of the whole study area can be obtained with this new approach without using check points.

Research paper thumbnail of Temporal analysis of coastal erosion in Turkey: a case study Karasu coastal region

Journal of Coastal Conservation, 2014

Coastal erosion may be caused by natural causes as well as human factors. Karasu town of the city... more Coastal erosion may be caused by natural causes as well as human factors. Karasu town of the city of Sakarya in Turkey which is a touristic region on the Black Sea coast has been experienced a drastic coastal erosion. In recent years, this erosion reached the threatening dimensions for the structures in the settlement. According to the temporal analyses of Landsat satellite images, the maximum erosion on the coastline was detected 100 m between 1987-2013. The results of the study show that the harbour construct on the Karasu coast has the major impact on this event. The secondary factor is that the amount of the sediment carried by the Sakarya River was decreased in time due to different reasons. To prevent the coastal erosion, a series of offshore breakwaters were planned after the failed application of groins on the coastline. In this study, temporal changes of the coastline are investigated by the Landsat satellite data and land surveys, possible reasons of the erosion are discussed and the solutions are proposed regarding the coastal structures.

Research paper thumbnail of İnsansız Sualtı Aracı Hareketinin Kalman Filtre İle Kestirimi ve Makine Öğrenmesi ile İyileştirilmesi

International Journal of Advances in Engineering and Pure Sciences

The aim of the study was to assess the antibody response to the ChAdOx1-nCoV vaccine in individua... more The aim of the study was to assess the antibody response to the ChAdOx1-nCoV vaccine in individuals who were not previously infected by COVID-19. Patients and Methods: All people aged 18-65 years who received their first vaccination with ChAdOx1-nCoV from March to May 2021 were approached for inclusion. Individuals with sufficient antibody titers against SARS-CoV-2 infection before vaccination were considered previously infected and were excluded from the analysis. We observed viral spike protein RBD-S1-specific IgG antibody levels at day 28 of the first dose of vaccination and day 14 of the second dose of vaccination (74 days from index vaccination). An optical density ratio (ODR) of >1.1 was considered to have a positive antibody response, 0.8 to 1.1 borderline and <0.8 was denoted as negative. Informed consent was ensured before enrollment, and ethical principles conformed with the current Declaration of Helsinki. Results: This observational study comprised 769 infection-naïve individuals (mean age 40.5 years, 38.9% female). Spike-specific IgG antibody responses elicited after the first and second doses of vaccine were 99.9% and 100%, respectively. The median ODR was 5.43 (interquartile range [IQR]: 4.32-6.98) and 10.90 (IQR 9.02-11.90) after the first and second doses. Higher age was associated with lower antibody levels after both dosages. However, no sex-specific variation was seen. People with comorbidity had a lower antibody level after the second dose. Tenderness (51.46%) and fever (19.30%) were the most common local and systemic side effects after vaccination. Conclusion: This study was one of the earlier attempts in the country to assess the antibody response to ChAdOx1-nCoV vaccine recipients. The results imply that general people should be encouraged to take the vaccine at their earliest.

Research paper thumbnail of Improvement of Filter Estimates Based on Data from Unmanned Underwater Vehicle with Machine Learning

2020 Innovations in Intelligent Systems and Applications Conference (ASYU), 2020

In this study, the mathematical model of unmanned underwater vehicle is obtained in 6 DOF. The na... more In this study, the mathematical model of unmanned underwater vehicle is obtained in 6 DOF. The navigation sensor data are generated from mathematical model response. Extended Kalman filer and Unscented Kalman filter is applied to estimate noisy sensor data. For the EKF, nonlinear model is linearized around the equilibrium points. For the UKF, nonlinear system model is used. The estimation performance of EKF and UKF are compared. Estimation has been improved by applying support vector machine algorithm, which is machine learning, for unscented Kalman filter estimates. All this study is modeled in MATLAB/Simulink and PYTHON environment.

Research paper thumbnail of Correlation between INS and GPS Based on Sea Surface Vehicle Motion

2020 Innovations in Intelligent Systems and Applications Conference (ASYU), 2020

The Global Positioning System (GPS) and integrated sonar systems are widely used for obtaining ba... more The Global Positioning System (GPS) and integrated sonar systems are widely used for obtaining bathymetric data. While the water vehicle coordinates can be provided with real-time kinematic (RTK) GPS observations instantaneously, depth information can be obtained through integrated sonar systems. The oscillation caused by factors such as wind and wave affects the position accuracy of bathymetric data. In this study, performance analysis was performed by using an inertial navigation system (INS) together with more than one GPS receiver to test the angular changes caused by the oscillation of the boat, in case of bathymetric operation with unmanned water vehicle. While there is a weak correlation between angular changes obtained from the RTK GPS method and INS in case of low boat oscillation, high correlation of approximately 99% in pitch and roll angles has been found if oscillation increases.

Research paper thumbnail of Recent Sea Level Change in the Black Sea from Satellite Altimetry and Tide Gauge Observations

ISPRS International Journal of Geo-Information, Mar 24, 2020

Research paper thumbnail of Uzaktan Algılama Teknolojisi ve Uydu Görüntüleri Yardımıyla Önemli Çevresel (Su Ve Kara Yüzeyi) Etkilerin Gözlemlenmesi

Küresel ısınma, sanayileşme ve insanoğlunun çevremizi çok fazla etkilediği günümüz koşullarında, ... more Küresel ısınma, sanayileşme ve insanoğlunun çevremizi çok fazla etkilediği günümüz koşullarında, bu etkilerin belirlenmesi, izlenmesi ve kontrolü insan yaşamı ve sağlığı bakımından önemli bir yer tutmaktadır. Çevresel etkilerin izlenmesi için birçok yöntem mevcuttur. Bu çalışmada, uzaktan algılama teknolojisi yardımıyla işlenen uydu görüntüleri ile önemli çevresel etkilerin nasıl gözlemlendiği ele alınmıştır. Bu etkilerin gözlenmesinde hangi yöntemlerin kullanıldığı ve yöntemlerin etkinliği üzerine bilgiler verilmiştir. Uzaktan algılama birçok alanda çok iyi sonuçlar vermektedir. Araştırma sonucunda uzaktan algılama teknolojisinin önemli çevresel değişimlerin gözlemlenmesi açısından da etkili bir yöntem olduğu ortaya konmuştur.

Research paper thumbnail of Evaluation of spatio-temporal variability in Land Surface Temperature: A case study of Zonguldak, Turkey

Environmental Monitoring and Assessment, 2015

The aim of this study is to analyze spatio-temporal variability in Land Surface Temperature (LST)... more The aim of this study is to analyze spatio-temporal variability in Land Surface Temperature (LST) in and around the city of Zonguldak as a result of the growing urbanization and industrialization during the last decade. Three Landsat 5 data and one Landsat 8 data acquired on different dates were exploited in acquiring LST maps utilizing mono-window algorithm. The outcomes obtained from this study indicate that there exists a significant temperature rise in the region for the time period between 1986 and 2015. Some cross sections were selected in order to examine the relationship between the land use and LST changes in more detail. The mean LST difference between 1986 and 2015 in ERDEMIR iron and steel plant (6.8 °C), forestland (3 °C), city and town centers (4.2 °C), municipal rubbish tip (-3.9 °C), coal dump site (12.2 °C), and power plants&amp;amp;amp;amp;#39; region (7 °C) were presented. In addition, the results indicated that the mean LST difference between forestland and city centers was approximately 5 °C, and the difference between forestland and industrial enterprises was almost 8 °C for all years. Spatio-temporal variability in LST in Zonguldak was examined in that study and due to the increase in LST, policy makers and urban planners should consider LST and urban heat island parameters for sustainable development.

Research paper thumbnail of Taşkömür Havzasindaki̇ Tasman Oluşumlarinin Yeryüzü Üzeri̇ndeki̇ Etki̇leri̇ni̇n CBS İle Beli̇rlenmesi̇

Madencilik, ulke ekonomisine olumlu katki saglamasina ragmen, uretimin gerceklestigi sahanin uzer... more Madencilik, ulke ekonomisine olumlu katki saglamasina ragmen, uretimin gerceklestigi sahanin uzerinde yada yanindaki yerlesim alanlari tasman tehlikesi altindadir. Madencilik tasmani, yer alti uretiminden dogan zemin ici hareketlerinin yeryuzundeki etkisidir. Bu nedenle etki alanindaki alan uzerinde ve icinde bulunan yollar, tuneller, yer alti galerileri, maden kuyulari, binalar, santraller, barajlar, su, gaz, elektrik, kanal ve kanalizasyon hatlarinin, isletmelerin, kentlerin ve ulkenin surdurulebilir yasami acisindan buyuk onemi bulundugundan etki alanlarinin belirlenmesi gereklidir. Bu calismada, Zonguldak Taskomur havzasi kozlu uretim bolgesinde gerceklestirilen yeralti madencilik faaliyeti sonucunda yer yuzeyinde olusan tasman etki alanlarinin Python programlama dilinde bilgisayar kodlari gelistirilerek ArcGIS yazilimina entegre edilmesi ile hesaplanmasi amaclanmistir.

Research paper thumbnail of Analysing the Effects of Different Land Cover Types on Land Surface Temperature Using Satellite Data

Monitoring Land Surface Temperature (LST) via remote sensing images is one of the most important ... more Monitoring Land Surface Temperature (LST) via remote sensing images is one of the most important contributions to climatology. LST is an important parameter governing the energy balance on the Earth and it also helps us to understand the behavior of urban heat islands. There are lots of algorithms to obtain LST by remote sensing techniques. The most commonly used algorithms are split-window algorithm, temperature/emissivity separation method, mono-window algorithm and single channel method. In this research, mono window algorithm was implemented to Landsat 5 TM image acquired on 28.08.2011. Besides, meteorological data such as humidity and temperature are used in the algorithm. Moreover, high resolution Geoeye-1 and Worldview-2 images acquired on 29.08.2011 and 12.07.2013 respectively were used to investigate the relationships between LST and land cover type. As a result of the analyses, area with vegetation cover has approximately 5 ºC lower temperatures than the city center and ar...

Research paper thumbnail of Kuzey Anadolu Fayinin Bolu -Yeniçağa Geçişindeki Tektonik Hareketlerinin GPS Gözlemleri İle İncelenmesi The investigation of tectonic movements in the Bolu-Yeniçağa segment of the North Anatolian Fault Zone with the aid of GPS observations

In this study, a summary of researches between January 1996 end September 1999 of the project car... more In this study, a summary of researches between January 1996 end September 1999 of the project carried out in Bolu-Yeniçağa by Depertment of Geodesy end Photogrammetry Engineering of Zonguldak Karaelmas University which the project is named "monitoring of surface displacement in the Western Black Sea Region" are presented. GİRİŞ Günümüzde tektonik kaynakli yer kabuğu hareketlerinin belirlenmesi, kita (anakara) hareketleri ve

Research paper thumbnail of Distributed GIS for Smart Cities : ArcGIS for Sustainable Society

There is a big need for spatially referenced data creation, analysis and management. Some of the ... more There is a big need for spatially referenced data creation, analysis and management. Some of the salient points that this research would be able to definitely contribute are facilitating the creation, sharing, and collaborative use of geospatial data. The objective is development of an automated natural hazard zonation system with Internet-SMS warning utilizing geomatics for sustainable societies. At present no web-enabled warning system exists which can disseminate warning after hazard evaluation at one go and in real time. The functionality is to be modular in architecture having GIS-GUI, input, understanding, rainfall prediction, expert, output, and warning modules. Through this paper a significantly enhanced system integrated with Web-enabled-geospatial information has been proposed, and it can be concluded that an automated hazard warning system has been conceptualized and researched. However, now the scope is to develop it further.

Research paper thumbnail of Distributed GIS for automated natural hazard zonation mapping Internet-SMS warning towards sustainable society

Cogent Engineering, 2014

Today, open systems are needed for real time analysis and warnings on geo-hazards and over time c... more Today, open systems are needed for real time analysis and warnings on geo-hazards and over time can be achieved using Open Source Geographical Information System (GIS)-based platform such as GeoNode which is being contributed to by developers around the world. To develop on an open source platform is a very vital component for better disaster information management as far as spatial data infrastructures are concerned and this would be extremely vital when huge databases are to be created and consulted regularly for city planning at different scales, particularly satellite images and maps of locations. There is a big need for spatially referenced data creation, analysis, and management. Some of the salient points that this research would be able to definitely contribute with GeoNode, being an open source platform, are facilitating the creation, sharing, and collaborative use of geospatial data. The objective is development of an automated natural hazard zonation system with Internet-short message service (SMS) warning utilizing

Research paper thumbnail of Evaluation of GOCE-Based Global Geopotential Models Versus EGM2008 and GPS/Levelling Data in Northwest of Turkey

International Association of Geodesy Symposia, 2015

Research paper thumbnail of Geometric correction accuracy of different satellite sensor images: application of figure condition

International Journal of Remote Sensing, 2007

ABSTRACT In this study, the figure condition method was introduced to analyse the accuracy of geo... more ABSTRACT In this study, the figure condition method was introduced to analyse the accuracy of geometric correction. Figure condition denotes the transformation ability of estimated model parameters for a given transformation model, and it can be used in a geometric correction procedure. To study the figure condition, multisensor satellite images were geometrically corrected using ground control points obtained by different methods. The accuracy of each geometric model was analysed by means of the root mean square error of unit weight and variance–covariance matrix of unknown parameters. Then, an error propagation law was applied to the geometric model in order to investigate the transformation ability of the model parameters and estimate error values of geometric correction for the whole image surface. The results of the research demonstrated that the figure condition can be applied to geometric correction, and error values of the whole study area can be obtained with this new approach without using check points.

Research paper thumbnail of Temporal analysis of coastal erosion in Turkey: a case study Karasu coastal region

Journal of Coastal Conservation, 2014

Coastal erosion may be caused by natural causes as well as human factors. Karasu town of the city... more Coastal erosion may be caused by natural causes as well as human factors. Karasu town of the city of Sakarya in Turkey which is a touristic region on the Black Sea coast has been experienced a drastic coastal erosion. In recent years, this erosion reached the threatening dimensions for the structures in the settlement. According to the temporal analyses of Landsat satellite images, the maximum erosion on the coastline was detected 100 m between 1987-2013. The results of the study show that the harbour construct on the Karasu coast has the major impact on this event. The secondary factor is that the amount of the sediment carried by the Sakarya River was decreased in time due to different reasons. To prevent the coastal erosion, a series of offshore breakwaters were planned after the failed application of groins on the coastline. In this study, temporal changes of the coastline are investigated by the Landsat satellite data and land surveys, possible reasons of the erosion are discussed and the solutions are proposed regarding the coastal structures.