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Mersin Photogrammetry Journal10
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Türkiye Fotogrametri Dergisi6
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Anadolu Orman Araştırmaları Dergisi4
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Türkiye Arazi Yönetimi Dergisi3
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Türkiye İnsansız Hava Araçları Dergisi3
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Applied Geomatics2
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Archaeological Prospection2
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Erciyes Üniversitesi Fen Bilimleri Enstitüsü Fen Bilimleri Dergisi2
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Forests2
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Photogrammetric Engineering & Remote Sensing2
Statistical and Visual Evaluation of Artificial Neural Networks and Multiple Linear Regression Performances in Estimating Reference Crop Evapotranspiration for Mersin
Unel, Fatma Bunyan | Kusak, Lutfiye | Yakar, Murat
This is study aimed to create a model for calculating the total reference crop evapotranspiration (ETo) in Mersin Province from May 2015 to 2020 and to generate maps using spatial analysis. Lemons from citrus play a significant role inMersin’s agriculture, and because of lemons’ sensitivity to temperature, ETo is essential for them. Itwas observed that the ETo value (EToPM) calculated using the Penman-Monteith (PM)method increased over the years. A model was developed using data from çâ Automated Weather Observing Systems (AWOS) in Mersin, Türkiye, which is located in a semi-arid climate zone. the model was created using Multiple Linear Regression (MLR) and artificial neural network (ANN) methods. the station climate data were divided into training and test datasets separately and c...
Investigation and Implementation of New Technology Wearable Mobile Laser Scanning (WMLS) in Transition to an Intelligent Geospatial Cadastral Information System
Yiğit, Abdurahman Yasin | Ulvi, Ali | Yakar, Murat
The human population is constantly increasing throughout the world, and accordingly, construction is increasing in the same way. Therefore, there is an emergence of irregular and unplanned urbanization. In order to achieve the goal of preventing irregular and unplanned urbanization, it is necessary to monitor the cadastral borders quickly. In this sense, the concept of a sensitive, up-to-date, object-based, 3D, and 4D (4D, 3D + time) cadastral have to be a priority. Therefore, continuously updating cadastral maps is important in terms of sustainability and intelligent urbanization. In addition, due to the increase in urbanization, it has become necessary to update the cadastral information system and produce 3D cadastral maps. However, since there are big problems in data collection in urb...
Dijital ikizlerin geliştirilmesinde fotogrametrinin kullanımı ve artırılmış gerçeklik ile görselleştirilmesi
Use of photogrammetry in the development of digital twins and visualization with augmented reality
Yiğit, Abdurahman yasin
Dijital ikiz oluşturmada en önemli kavram, objenin gerçekliği ne kadar iyi temsil ettiği ve güncellenebilir olmasıdır. Fotogrametri yöntemi bu noktada fotoğraflardan 3B modeller oluşturma yöntemi olduğu için gerçekliği en iyi temsil eden yöntemlerden biridir. Fotogrametri yöntemiyle bir nesnenin farklı açılardan birden fazla fotoğrafı çekilerek nesnenin 3B modeli oluşturulabilir ve bu modeller daha sonra dijital ikiz oluşturmak için kullanılabilir. Çalışmanın ana odak noktası fotoğraf verilerinden üretilen 3B fotogrametrik verilerin dijital ikiz olarak işlev görmesi için bir temsilin temel gereksinimlerini formüle etmek ve bu temel gereksinimlerin bir prototip dijital ikizde nasıl uygulanabileceğini göstermektir. Bu amaç doğrultusunda farklı boyutlarda ve karmaşık yapıdaki üç adet objenin ...
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...
Su Altı Yapılarının 3B Modellemesi ve Dokümantasyonunda Kullanılan Video ve Fotoğraf Çekimi Yöntemlerinin Karşılaştırmalı Analizi
Yiğit, Abdurahman Yasin | Ulvi, Ali | Yakar, Murat
Su altındaki bir cismin üç boyutlu olarak belgelenmesi ve dijital platformlara aktarılması son yıllarda önem kazanmıştır. Bu amaçla fotogrametri yöntemi su altında denenmiş ve sualtı fotogrametrisi terimi literatürde kendine yer bulmuştur. Fotogrametri yönteminin tercih edilmesinin en önemli nedeni geleneksel yöntemlere göre daha kısa sürede veri üretimi, zaman ve maliyet açısından olumlu katkı sağlamasıdır. Ancak su altında fotografik veri toplayan dalgıçlar su altında sınırlı bir süre kalabildikleri için fotoğraflama işlemi tekrarlanmakta ve süreç uzamaktadır. Bu olumsuzluğu en aza indirmek için video çekim yöntemiyle veri elde etme çalışmaları denenmeye başlanmıştır. Bu çalışmada, bir havuza test amaçlı obje yerleştirilerek hem fotoğraf çekim hem de video çekim yöntemi ile üç boyutlu mo...
Kültürel mirasın dokümantasyonu çalışmalarında farklı yazılımların karşılaştırılması: Dikilitaş (Theodosius Obeliski) Örneği
Çelik, Mehmet Özgür
Türkiye tarih boyunca pek çok farklı medeniyete ev sahipliği yapmış bir ülke olması dolayısıyla bu medeniyetlere ait, oldukça çeşitli kültürel miras ögelerini içinde barındırmaktadır. Bu bağlamda, sahip olduğumuz bu kültürel mirasın korunması ve gelecek nesillere ulaştırılması oldukça önem arz etmektedir. Kültürel miras ögeleri zaman içerisinde birçok farklı sebepten ötürü deformasyona uğrayabilmekte veya tamamen yok olabilmektedir. Bu durumun önüne geçilebilmesi için öncelikle bu kültürel miras ögelerinin 3 Boyutlu (3B) dokümantasyonunun (belgelenmesinin) yapılması gerekmektedir. Dokümantasyon sonucunda elde edilen veriler, kültürel miras ögeleri üzerindeki deformasyonların izlenmesi, restorasyon çalışmaları gibi pek çok farklı alanda katkı sunabilmektedir. Günümüzde dokümantasyon çalışma...
Hybrid Modeling of Adamkayalar Reliefs
Çelik, Mehmet Özgür
Throughout history, many civilizations with different ethnic and national values have lived in Anatolia. In many parts of Turkey's possible to encounter this civilization's cultural heritage. Cultural heritages in the world; until today, it has been affected by natural events such as earthquakes, floods and fire. These have been completely or partially destroyed as a result of human activities. Cultural heritage is very precious to people and assurance. Quick and practical documentation is of great importance to this. Various methods are used for this documentation process. Among these methods, terrestrial laser scanning (TLS) and Unmanned Aerial Vehicle (UAV) photogrammetry are frequently preferred techniques in recent years. Both methods ensure recording cultural heritages and producing ...
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 ...
Explainable Sinkhole Susceptibility Mapping Using Machine-Learning-Based SHAP: Quantifying and Comparing the Effects of Contributing Factors in Konya, Türkiye
Iban, Muzaffer Can
Sinkholes, naturally occurring formations in karst regions, represent a significant environmental hazard, threatening infrastructure, agricultural lands, and human safety. In recent years, machine learning (ML) techniques have been extensively employed for sinkhole susceptibility mapping (SSM). However, the lack of explainability inherent in these methods remains a critical issue for decision-makers. In this study, sinkhole susceptibility in the Konya Closed Basin was mapped using an interpretable machine learning model based on SHapley Additive exPlanations (SHAP). The Random Forest (RF), eXtreme Gradient Boosting (XGBoost), and Light Gradient Boosting Machine (LightGBM) algorithms were employed, and the interpretability of the model results was enhanced through SHAP analysis. Among the c...
Investigation of landslide detection using radial basis functions: a case study of the Taşkent landslide, Turkey
Şanlıoğlu, İsmail
This paper investigates landslide detection over flat and steep-slope areas with large forest cover using different radial basis function interpolation methods, which can affect the quality of a digital elevation model. Unmanned aerial vehicles have been widely used in landslide detection studies. The generation of image-based point clouds is achievable with various matching algorithms from computer vision systems. Point cloud-based analysis was performed by generating multi-temporal digital elevation models to detect landslide displacement. Interpolation methodology has a crucial task to fill the gaps in insufficient areas that result from filtered areas or sensors that do not generate spatial information. Radial basis function interpolations are the most commonly used technique for estim...
Accurate determination of the Taşkent (Konya, Turkey) landslide using a long-range terrestrial laser scanner
Şanlıoğlu, İsmail
Landslides are a common type of mass movement that occur in large numbers and have significant effects on topography. In Turkey, landslides rank second after earthquakes among natural disasters that cause widespread loss of life and property. This study investigates the monitoring of the Tas¸kent Landslide (Konya, Turkey), which has considerably affected the local topography. The landslide in Tas¸kent had an adverse effect on transportation to nearby towns and villages. Initial studies were conducted using the global navigation satellite system (GNSS) measurement scale; these studies are currently ongoing. Since 2011, studies using terrestrial laser scanning (TLS), which is one of the latest ground-positioning technologies, have also been launched. This article presents the results of the ...
Investigation of The Rainwater Harvesting Potential at the Mersin University, Turkey
Yiğit, Abdurahman Yasin | Ulvi, Ali | Orhan, Osman
The rapid population growth in the world and the adverse effects of climate change, has caused a severe increase in water demand used in sectors such as agriculture, industry, and domestic usage. The fact that the water resources in the world are stable and their availability is limited, the importance of water resources, efficient use of water, and the use of technologies related to alternative water resources have become important. This study aimed to investigate the usage potential of rainwater to be collected from the roofs of the building in irrigation of green areas in Mersin University - Çiftlikköy campus. For this purpose, first, whether the roofs inside the campus can collect rainwater will be revealed with unmanned aerial vehicles. Then, appropriate roof areas where rainwater wil...
Taşınmaz Satışlarında Noterlerin Yetkilendirilmesinin Tapu Sistemi Olası Etkilerinin Kadastro 2014 Vizyonuyla Araştırılması
Çelik, Mehmet Özgür
Tüm dünyada kadastro ve tapu işlemlerinin de içinde yer aldığı arazi yönetimi sistemlerine öncülük eden FIG (International Federation of Surveyors), bu alanda ortaya koyduğu çalışmalarla emlak sektörünü topyekûn etkilemektedir. Türkiye hem "Kadastro 2014" ifadeleri hem de AİTM (Arazi İdaresi Temel Modeli) çalışmalarını dikkate alarak kendi tapu ve kadastro sistemini sürekli geliştirmektedir. Ülkemizde TKGM (Tapu ve Kadastro Genel Müdürlüğü) taşınmaz mallara ilişkin akit ve tescil işlemlerini yerine getirmek gibi birçok görev üstlenmiş bir kamu kamu kurumudur. Yasalarla kendisine verilmiş olan görevlerini ülke genelinde 24 Bölge Müdürlüğü, 81 İl Kadastro Müdürlüğü ve her bir ilçede en az bir tane olmak üzere toplam 973 Tapu Müdürlüğü ile yürütmektedir. Taşınmaz alım-satımı ve tapu siciline ...
Combination of Terrestrial Laser Scanning and Unmanned Aerial Vehicle Photogrammetry for Heritage Building Information Modeling: A Case Study of Tarsus St. Paul Church
Yiğit, Abdurahman Yasin | Ulvi, Ali | Fidan, Şafak
Cultural heritage building information modeling (HBIM) is an emerging process allowing us to reconstruct built heritage virtually. The data of a digitally documented cultural heritage building offers significant advantages as it is accessible and modifiable by all professionals involved in the same or different projects. The most important factor affecting the accuracy and precision of the HBIM model is the ability to collect complete and accurate information about the physical structure. Combining terrestrial laser scanning (TLS) and unmanned aerial vehicle (UAV) photogrammetry point clouds is one of the most efficient ways to capture accurate digital data on the building. This study provides the foundation for creating an HBIM model for cultural heritage the coupling of spatial data with...
Development of Guide Material for the Education of Cultural Immovable Heritage Management for Bachelor Students of Geomatics Engineering
Çelik, Mehmet Özgür
Türkiye has a wealth of foundations and their properties, assets managed by the General Directorate of Foundations (GDF) through its geomatics engineers. This article aims to identify the misconceptions of senior undergraduate geomatics engineering students (sample group) about the relationship between foundations and land ownership registered as cultural heritage. It will develop and implement materials to eliminate these misconceptions and evaluate their effectiveness. This study consists of a preliminary, a pilot and the main application. The data collection instruments are an open-ended questionnaire, a semi-structured interview form and conceptual understanding tests. As a result of the analysis of the pre-study and the pilot study, guidance materials on information deficits and misun...