Samet Aksoy

Istanbul Technical University · Department of Geomatics Engineering

Soil salinization caused by natural and anthropogenic factors is an important environmental hazard especially in arid and semi-arid regions of the world. Accumulation of salts in the soil is a major threat to crop production and global agriculture; therefore, rapid and precise detection of salt-affected lands is highly critical for preserving soil...

ABSTRACT Environmental problems caused by rapid and uncontrolled urbanization are increasing day by day. When the needs of the growing population are also in question, urbanization problems become unavoidable when considered on a global scale. Since housing is one of the most important population-related needs, there is an increase in urban areas a...

Olives are a crucial economic crop in Mediterranean countries. Detailed spatial information on the distribution and condition of crops at regional and national scales is essential to ensure the continuity of crop quality and yield efficiency. However, most earlier studies on olive tree mapping focused mainly on small parcels using single-sensor, ve...

The aim of this study is to comparatively analyze the performance of machine learning (ML) algorithms for modeling soil salinity using field-based electrical conductivity (EC) data and Landsat-8 OLI satellite images with derived environmental covariates. We also aim to interpret and explain the ML models with and without over-sampling methods using...

Natural and planted forests, covering approximately 31% of the Earth’s land area, are crucial for global ecosystems, providing essential services such as regulating the water cycle, soil conservation, carbon storage, and biodiversity preservation. However, traditional forest mapping and monitoring methods are often costly and limited in scale, high...

This paper introduces Sentinel-2 Biophysical Engine implemented on the Google Earth Engine (GEE) platform, addressing the critical need for high-resolution, near-real-time monitoring of Earth's surfaces in response to population growth and climate change. Leveraging Copernicus Ground-Based Observations for Validation (GBOV) data, the tool utilizes...

This research aims to find crop-based residue burning (CRB) amounts for the Southeastern Anatolia Region of Türkiye, where versatile and diverse of agricultural fields are available. We used the time series of Sentinel-2 images to identify spatial distribution of different crop types and to determine the burned agricultural fields in 2019 using Goo...

The environmental problems caused by rapid and uncontrolled urbanization are increasing day by day. When the needs of the growing population are also in question, urbanization problems become unavoidable when considered on a global scale. Since housing is one of the most important population-related needs, there is an increase in urban areas and an...

We aimed to determine the spatial extent of burned areas using remote sensing data and machine learning methods.IT is often difficult, time-consuming and costly to collect in-situ data after fires; therefore, remote sensing (RS) is widely used in determining burnt regions. We selected the Manavgat district of Antalya province as the study area due...

The harmful impacts of fast urbanization and population growth on nature are becoming more pronounced every day. Human demands are growing in tandem with population growth, and the most common solutions advocated to address these needs are agricultural development and urbanization. The increase in urban areas causes a decrease in forest and green a...

In this study, we aim to compare the VCI maps and time series derived from two very well-known and widely used satellite platforms namely MODerate resolution Imaging Spectroradiometer (MODIS) and Landsat to monitor and understand the drought conditions. We investigated the impacts of spatial and temporal resolutions on drought analysis by further i...

Drought is a climate event that occurs cumulatively and slowly in different time periods and varies geographically.Evapotranspiration increase as a result of precipitation deficit and high temperatures lead to drought conditions. Globalwarming is also triggering and increasing the frequency and duration of drought events. Drought has impacts on agr...

Drought is an important natural hazard causing adverse effects on the economy, agriculture, ecology, and human life. Increasing evapotranspiration as a result of higher temperature values and precipitation deficiency trigger drought conditions. Unlike the other natural hazards, drought is slowly developing disaster but its impacts are cumulative an...

Olive, a crucial crop for the economies of Mediterranean countries, is expanded to Aegean, Mediterranean, Marmara, SouthEast and Black Sea regions of Turkey. Identification of olive trees in heterogeneous land surfaces, particularly in mountainous regions is essential for exploitation of un-grafted olive trees. In this study, several samples of oli...