Discontinuity set extraction from 3D point clouds obtained by UAV Photogrammetry in a rockfall site

Yiğit, Abdurahman Yasin | Ulvi, Ali | Alptekin, Aydın | Yakar, Murat

Rockfall event is common on rocky terrain, and it threatens people. Recent advances in remote sensing technologies allow us to model the terrain with high accuracy and resolution. In this study, we show the application of modeling a rockfall site in three-dimensional (3D) using an unmanned aerial vehicle. The acquisition of information about discontinuities in the rock masses using 3D point clouds is vital to characterize rockfall dynamics. We obtained 3D spatial information and point clouds of a rocky slope from acquired images. We extracted 10 discontinuity sets from the 3D model as they have significant effects on the failure mechanism. Details in mapping discontinuities have improved significantly with the help of point clouds. The results are beneficial for modeling the terrain of ina...

The effect of different flight heights on generated digital products: DSM and Orthophoto

Çelik, Mehmet Özgür | Kuşak, Lütfiye | Ünel, Fatma Bünyan | Alptekin, Aydın | Kanun, Engin

Unmanned Aerial Vehicle (UAV) allows you to create digital surface models (DSM) and orthophotos of an area in a short time by photogrammetric methods. In the last decade, UAV and Global Positioning System (GPS) have been used to create real, reliable and high-resolution maps. In this study, the effect of flight height on DSM and orthophoto was investigated. Two flight plans at a height of 30 to 50 meters were prepared. Images taken with UAV were used to produce DSM and orthophoto. Resolution of maps were compared when models were produced. Compared to a flight height of 50 meters, a more detailed and high-resolution model was created with 30 meters. Although the flight data from 30 meters gave better results, the flight process took longer. Also, more photos were taken and the file size to...

Mapping of a rockfall site with an unmanned aerial vehicle

Çelik, Mehmet Özgür | Alptekin, Aydın | Yakar, Murat

The combination of geological, topographical and climatic conditions causes mass movements. Rockfall, which is a frequently seen disaster at mountainous regions, gives damage to residential areas and transportation corridors. Rockfall barriers are being designed to capture falling rocks worldwide. The classical method applied in rockfall analysis is 3D modelling of the study area to determine rockfall trajectory with the help of Digital surface model (DSM). 3D rockfall simulation is performed in order to determine bounce height, maximum run-out distance and kinetic energy of rocks. DSM of the study area needs to be accurately determined to properly design barrier system. Unmanned aerial vehicle (UAV) can be used to prepare actual DSM from inaccessible areas. In this study, we prepared the ...

Mersin ili merkez yerleşim alanındaki kohezyonlu zeminlerin indeks ve konsolidasyon özelliklerinin belirlenmesi

Alptekin, Aydın

Illustrating of a Landslide Site with Photogrammetric and LIDAR Methods

Çelik, Mehmet Özgür | Alptekin, Aydın | Yakar, Murat

2024-12-26

Modelling of the mausoleum in Kanlidivane ruins with terrestrial laser scanner

Çelik, Mehmet Özgür | Alptekin, Aydın | Yakar, Murat

2024-12-26

Anafi Parrot’un heyelan bölgesi haritalandırılmasında kullanımı

Çelik, Mehmet Özgür | Kuşak, Lütfiye | Ünel, Fatma Bünyan | Alptekin, Aydın | Yakar, Murat

Türkiye, sahip olduğu jeomorfolojik yapısından dolayı sıklıkla can ve mal kaybına yol açan doğal afetlere maruz kalmaktadır. Son yıllarda afetlerle mücadele için hazırlanan mühendislik projelerinde fotogrametrik yöntemler sıklıkla kullanılmaya başlamıştır. Teknolojik gelişmeler afete maruz bölgelerin modellenmesinde bize büyük kolaylıklar sağlamaktadır. İnsansız hava araçları (İHA) ile çekilen fotoğraflar sayesinde bölgenin güncel durumu 3B olarak öğrenilebilmektedir. Bu çalışmada Anafi Parrot’ın heyelan bölgesinde hem Android hem de iOS telefonlarda kullanımı ile ilgili bilgiler verilecek, olumlu ve olumsuz yanlarından bahsedilecek ve bir heyelan bölgesinin ortofotosu ortaya çıkartılacaktır. Küçük heyelan bölgelerinin modellenmesi işlerinde Android telefon kullanarak Anafi Parrot rahatlık...

Apriori association rule and K-means clustering algorithms for interpretation of pre-event landslide areas and landslide inventory mapping

Çelik, Mehmet Özgür | Kuşak, Lütfiye | Ünel, Fatma Bünyan | Alptekin, Aydın | Yakar, Murat

In this paper, an inventory of the landslide that occurred in Karahacılı at the end of 2019 was created and the pre-landslide conditions of the region were evaluated with traditional statistical and spatial data mining methods. The current orthophoto of the region was created by unmanned aerial vehicle (UAV). In this way, the landslide areas in the region were easily determined. According to this, it was determined that the areas affected by the landslides had an average slide of 26.56 m horizontally. The relationships among the topographic, hydrographic, and vegetative factors of the region were revealed using the Apriori algorithm. It was determined that the areas with low vegetation in the study area with 55% confidence were of a Strong Slope feature from the Apriori algorithm. In addit...

Kıyı Yönetimi İçin Kıyı ve Kıyı Kenar Çizgisinin Belirlenerek Mersin Kıyı Bilgi Sistemi Altyapısının Araştırılması

Çelik, Mehmet Özgür | Ünel, Fatma Bünyan | Kuşak, Lütfiye | Alptekin, Aydın | Yakar, Murat

2024-12-26

Anıtmezarın yersel lazer tarayıcı kullanarak 3B modellenmesi

Çelik, Mehmet Özgür | Alptekin, Aydın | Yakar, Murat

Türkiye pek çok tarihi esere sahip bir ülkedir. Kültürel mirasımızın korunması ve gelecek nesillere aktarılabilmesi için bilgisayar ortamında modellenerek belgelenmesi çok önemlidir. Mersin’ de bulunan Kanlıdivane Ören yeri, içerisinde Antik dönemde yapılmış olan pek çok kilise, yağ üretim yeri ve mezar bulundurmaktadır. Bu çalışmada Olba İmparatorluğu’ nun önemli bir kenti olan Kanlıdivane Ören Yeri’ nde bulunan bir Anıtmezar’ ın yersel lazer tarayıcı (YLT) kullanarak 3B modeli çıkartılmaya çalışılmıştır. Anıtmezar günümüze kadar bozulmadan ayakta kalabilmiş nadir yapılardandır. YLT ile yüksek çözünürlükte taramalar yapılmış ve 3B nokta bulutu bilgisayar ortamında oluşturulmuştur. Oluşturulan model bölgenin turizm açısından tanıtılmasında ve ileride yapılabilecek olan restorasyon işinde k...

2D flood modeling with the help of GIS: Mersin / Lamas River

Çelik, Mehmet Özgür | Alptekin, Aydın | Yakar, Murat

2024-12-26

Detection of existing infrastructure lines with wearable laser scanners and making infrastructure map: a case of Mersin University

Ulvi, Ali | Yiğit, Abdurahman Yasin | Çelik, Mehmet Özgür | Alptekin, Aydın

Technological developments have shown themselves in the field of engineering as in every field. Wearable mobile laser scanner (WMLS) system is a technique based on simultaneous localization and mapping (SLAM) algorithm. This technique enables the creation of a map of an unknown environment bypassing with distance sensors while simultaneously determining the system located on the map. Due to the rapid progress in measurement technology, a heron WMLS has been used in the detection of underground lines. The point cloud of the roads was obtained with the laser scanner. Sewerage, water, and natural gas pipelines were determined through the point cloud. These determinations were checked with a Global Positioning System (GPS) device. As a result of this study, maps of the existing infrastructure ...

Effect of Flight Height On DEM and Orthophoto

Çelik, Mehmet Özgür | Alptekin, Aydın | Kuşak, Lütfiye | Ünel, Fatma Bünyan | Yakar, Murat

2024-12-26

Modelling of a Sea Cliff with Terrestrial Laser Scanning

Çelik, Mehmet Özgür | Yakar, Murat | Alptekin, Aydın

2024-12-26

Comparing Shorelines of Aydınlar Pond with Photogrammeric and Remote Sensing Methods

Çelik, Mehmet Özgür | Alptekin, Aydın | Kuşak, Lütfiye | Ünel, Fatma Bünyan | Yakar, Murat

2024-12-26

Availability of Anafi Parrot in Disaster Site Modelling

Çelik, Mehmet Özgür | Alptekin, Aydın | Kuşak, Lütfiye | Ünel, Fatma Bünyan | Yakar, Murat

2024-12-26