Production of Bathymetry Maps by Acoustic Sounding and Satellite Imaging Method: The Example of Sinop Hurmadibi

Eray Yılmaz; Faik Ahmet Sesli; Ömer Faruk Uzun

Article Details

Production of Bathymetry Maps by Acoustic Sounding and Satellite Imaging Method: The Example of Sinop Hurmadibi

Authors:

Eray Yılmaz | Faik Ahmet Sesli | Ömer Faruk Uzun

Publisher:

Giresun University

Main Topics:

Mühendislik

Journal:

Karadeniz Fen Bilimleri Dergisi Vol.13 Issue 3, pp.764-780

Document Type:

Article

Publication Date:

9/2023

Document Language:

Turkish

Document ID (Org No.):

2001298576

pISSN:

2564-7377

Keywords:

Abstract:

 In the study; It is aimed to produce and interpret bathymetric maps with acoustic sounder and satellite sourced methods. In this context, bathymetry study was carried out with acoustic sounding method in Hurmadibi locality in Gerze district of Sinop province. Subsequently, a bathymetry map was produced using the data obtained. Landsat 8 satellite images were used for the generation of satellite-based bathymetry maps. After obtaining the satellite image, the radiometric correction process was applied to eliminate the systematic errors and atmospheric effects in the satellite sensors. Then, relative and absolute depth data were obtained from the image via Envi remote sensing software. The Log Ratio Transformation LRT method, which is based on the principle of proportioning the bands in the satellite image, is used to obtain the depths from the satellite image. In order to reach the absolute depth values from the relative depth values, 15 calibration points obtained by the acoustic sounder method were used. A regression model was created between relative and absolute depths, and the R2 value of the regression was found to be 0.78. After obtaining the bathymetry map from the satellite images, the depths obtained from both methods were compared and the mean square error was calculated as  1.07 m. As a result of the study; It has been concluded that sonar methods, which provide higher accuracy and faster results compared to other methods, are the most suitable method for bathymetry studies.

 In the study; It is aimed to produce and interpret bathymetric maps with acoustic sounder and satellite sourced methods. In this context, bathymetry study was carried out with acoustic sounding method in Hurmadibi locality in Gerze district of Sinop province. Subsequently, a bathymetry map was produced using the data obtained. Landsat 8 satellite images were used for the generation of satellite-based bathymetry maps. After obtaining the satellite image, the radiometric correction process was applied to eliminate the systematic errors and atmospheric effects in the satellite sensors. Then, relative and absolute depth data were obtained from the image via Envi remote sensing software. The Log Ratio Transformation LRT method, which is based on the principle of proportioning the bands in the satellite image, is used to obtain the depths from the satellite image. In order to reach the absolute depth values from the relative depth values, 15 calibration points obtained by the acoustic sounder method were used. A regression model was created between relative and absolute depths, and the R2 value of the regression was found to be 0.78. After obtaining the bathymetry map from the satellite images, the depths obtained from both methods were compared and the mean square error was calculated as  1.07 m. As a result of the study; It has been concluded that sonar methods, which provide higher accuracy and faster results compared to other methods, are the most suitable method for bathymetry studies.

 In the study; It is aimed to produce and interpret bathymetric maps with acoustic sounder and satellite sourced methods. In this context, bathymetry study was carried out with acoustic sounding method in Hurmadibi locality in Gerze district of Sinop province. Subsequently, a bathymetry map was produced using the data obtained. Landsat 8 satellite images were used for the generation of satellite-based bathymetry maps. After obtaining the satellite image, the radiometric correction process was applied to eliminate the systematic errors and atmospheric effects in the satellite sensors. Then, relative and absolute depth data were obtained from the image via Envi remote sensing software. The Log Ratio Transformation LRT method, which is based on the principle of proportioning the bands in the satellite image, is used to obtain the depths from the satellite image. In order to reach the absolute depth values from the relative depth values, 15 calibration points obtained by the acoustic sounder method were used. A regression model was created between relative and absolute depths, and the R2 value of the regression was found to be 0.78. After obtaining the bathymetry map from the satellite images, the depths obtained from both methods were compared and the mean square error was calculated as  1.07 m. As a result of the study; It has been concluded that sonar methods, which provide higher accuracy and faster results compared to other methods, are the most suitable method for bathymetry studies.

 Çalışmada; akustik iskandil ve uydu kaynaklı yöntemler ile batimetrik haritaların üretilmesi ve yorumlanması amaçlanmıştır. Bu kapsamda Sinop ili, Gerze ilçesinde yer alan Hurmadibi mevkinde akustik iskandil yöntemi ile batimetri çalışması yapılmıştır. Akabinde elde edilen veriler kullanılarak batimetri haritası üretilmiştir. Uydu kaynaklı batimetri haritası üretimi için Landsat 8 uydu görüntüleri kullanılmıştır. Uydu görüntüsü temin edildikten sonra, uydu sensörlerindeki sistematik hatalar ve atmosferik etkilerin giderilmesi için radyometrik düzeltme işlemi uygulanmıştır. Daha sonra Envi uzaktan algılama yazılımı aracılığıyla görüntüden, bağıl ve mutlak derinlik verileri elde edilmiştir. Uydu görüntüsünden derinliklerin elde edilmesinde, uydu görüntüsündeki bantların oranlanması prensibine dayanan Log Ratio Transformation LRT yöntemi kullanılmıştır. Bağıl derinlik değerlerinden mutlak derinlik değerlerine ulaşmak için akustik iskandil yöntemi ile elde edilen 15 kalibrasyon noktası olarak kullanılmıştır. Bağıl derinlikler ile mutlak derinlikler arasında regresyon modeli oluşturulmuş, regresyona ait R2 değeri 0.78 olarak bulunmuştur. Uydu görüntülerinden batimetri haritası elde edildikten sonra her iki yöntemden elde edilen derinlikler karşılaştırılarak karesel ortalama hata  1.07 m olarak hesaplanmıştır. Çalışmanın sonucunda; diğer yöntemlere nazaran yüksek doğruluk sağlayan ve daha hızlı sonuç veren sonar yöntemlerin, batimetri çalışmaları için en uygun yöntem olduğu sonucuna ulaşılmıştır.

Article Details

Production of Bathymetry Maps by Acoustic Sounding and Satellite Imaging Method: The Example of Sinop Hurmadibi

Authors:

Eray Yılmaz | Faik Ahmet Sesli | Ömer Faruk Uzun

Publisher:

Giresun University

Main Topics:

Mühendislik

Journal:

Karadeniz Fen Bilimleri Dergisi Vol.13 Issue 3, pp.764-780

Document Type:

Article

Publication Date:

9/2023

Document Language:

Turkish

Document ID (Org No.):

2001298576

pISSN:

2564-7377

Bathymetry

Hydrography

Geographical information systems

Satellite images

Acoustic sounder

SONARBatimetri

Hidrografi

Coğrafi bilgi sistemleri

Uydu görüntüleri

Akustik iskandil

SONAR

Issues

Article Details

Authors: Eray Yılmaz | Faik Ahmet Sesli | Ömer Faruk Uzun

Publisher: Giresun University

Main Topics: Mühendislik

Journal: Karadeniz Fen Bilimleri Dergisi Vol.13 Issue 3, pp.764-780

Document Type: Article

Publication Date: 9/2023

Document Language: Turkish

Document ID (Org No.): 2001298576

pISSN: 2564-7377

Issues

Authors:

Eray Yılmaz | Faik Ahmet Sesli | Ömer Faruk Uzun

Publisher:

Giresun University

Main Topics:

Mühendislik

Journal:

Karadeniz Fen Bilimleri Dergisi Vol.13 Issue 3, pp.764-780

Document Type:

Article

Publication Date:

9/2023

Document Language:

Turkish

Document ID (Org No.):

2001298576

pISSN:

2564-7377