85 research outputs found

    International progress and evaluation on interactive coupling effects between urbanization and the eco-environment

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    Using high-resolution satellite imagery to determine hazelnut planted areas in Istanbul province

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    The geographical inventory of hazelnut for the region is needed both for the protection of hazelnut cultivation fields in the city master plan of Istanbul and for the implementation of the hazelnut policy of the Ministry of Agriculture. Commonly cultivated between the northern latitudes of 36' and 41' under specific climate conditions, hazelnuts are native to North Anatolia, where they have grown wildly or been cultivated for roughly 2500 years. In Istanbul, hazelnuts are cultivated to the north of the province, particularly in Sile and its vicinity along the Anatolian shores of the Black Sea. This project illustrates the possibility of determining hazelnut-planted areas using high-resolution satellite images. The study used as the data IKONOS pan-sharpened images acquired in June 2005 with a resolution of 4 m multispectral and 1 m pancromatic. A fusion technique was performed on the satellite images to obtain a pansharpened image with a 1-m resolution. The project uses two methods, which are classification and on-screen manual digitising. The results of the two methods were compared to test their performance

    RESEARCH ON DEVELOPMENT OF NATURAL THRESHOLD ANALYSIS MODEL FOR LAND USE DECISIONS: THE CASE OF URLA (IZMIR)

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    The rapid increase of human-induced environmental problems, especially the current situation in our big cities and the environmental pressure caused by them leads to destruction of our vital natural resources. With wrong land use decisions made on various scales, natural features are negatively affected, which can harm to humans and other livings and can compromise the sustainability of the natural structure. In this research, evaluations and analysis are made on land-use decisions and natural thresholds and two approaches of protective and prudence are opted for in order to carry out an assessment of natural threshold of Urla. District selected as the study area for this purpose, sets of data were taken into consideration in Urla district including conservation areas, grasslands, agricultural lands, forest areas, water surfaces and fault lines. All data are kept in a database in accordance with the rules of GIS (Geographic Information Systems) and the model generated through analysis of the natural threshold. As a result of these studies in Urla district, given the values of cardinality and density of that area, 57935.5 ha absolutely required to be protected, 3936.91 ha top priority area to be protected and 4781.89 ha areas which can be placed and can get other land use decisions. The areas were classified in three groups, and a 1/25 000-scale map of the synthesis and report were prepared. Spatial data produced as a result of this study, bear a significant base feature in controlling the compliance of existing plan decisions with natural threshold and future planning studies

    RESEARCH TO DETERMINE THE EFFECTS OF DIFFERENT SOIL PROPERTIES ON SPECTRAL REFLECTANCE VALUES OF CROPLANDS

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    WOS: 000456590800008The use of remote sensing techniques and Geographical Information Systems (GIS) for agricultural activities is becoming increasingly popular. Benefitting from remote sensing, essential functions, including cropland coverage estimation and monitoring, can be achieved. As the reflectance values of the same product type can differ with respect to soil characteristics, this research aims to investigate the relationship between the soil properties and the cropland reflectance values. In this study, 104 wheat-barley parcels and 26 potato parcels in the Central Anatolia region of Turkey were chosen from two different districts; Haymana and Bunyan. To disclose the relationship, images from the Sentinel 2 satellite was downloaded for predefined parcels during one season of production. Digital numbers (DN) of satellite images have been changing according to species phenological stages for each band, therefore, there are no standard soil reflection values even for the same crop species. In this study, the reflection characteristics of two plant species grown on different coloured soils were investigated. As a result of this research, soil properties which include soil colour, water holding capacity and mineral composites should be considered for the determination of the reference for reflection values of cropland.Ege University Scientific Research Projects Coordination Unit [18-ZRF-022]; Turkish Agricultural Insurance Pool (TARSIM)We would like to acknowledge to Ege University Scientific Research Projects Coordination Unit (Project number: 18-ZRF-022) and Turkish Agricultural Insurance Pool (TARSIM) for financial and logistic support to our project

    Control of farmer statements integrated in national farmer register system by remote sensing data

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    Institute of Agricultural Resources and Regional Planning of CAAS;Institute of Electrical and electronics Engineers (IEEE) Geoscience and Remote Sensing Society (GRSS);National Agricultural Statistics Service (NASS);Open Geospatial Consortium (OGC);Republic of Turkey Ministry of Food, Agriculture and Live Stock;United States Department of Agriculture (USDA)4th International Conference on Agro-Geoinformatics, Agro-Geoinformatics 2015 -- 20 July 2015 through 24 July 2015 -- 118110It is necessary to monitor the crop pattern in parcel level and to obtain the data having agricultural statistic value to ensure that the national agricultural policies are implemented in a more rational and effective way. It is known that the most common means used to apply agricultural policies are premium-support systems. However, inaccuracies in crop pattern statements of producer, deviations in the amount of cultivated area and erroneous the yield declarations prevent to apply the premium support system in an effective way. Therefore, monitoring of agricultural crop pattern in parcel level is of a vital importance. The effective monitoring of agricultural crop pattern can only be possible by means of using in conjunction withGeographic Information System (GIS) and Remote Sensing (RS) data. In this project that is a pilot study, cotton production, one of the most common of agricultural products in the Aegean Region, is selected as crop pattern example. In this project, the agricultural parcels digitized by General Directorate of Agricultural Reform (GDAR) are used as a basis. Information system of agricultural parcels are integrated with Farmer Registration System (FRS) data containing statement information to gain the farmer statement information belonging to each agricultural parcel as an attribute data. Rapid Eye and SPOT satellite images covering an area of 11.179 km2 are used to monitor the crop pattern in parcel level and perform the farmer statement checks. Shooting of satellite images was made in August when land cover ratio of the cotton plant is the highest stage. The results obtained from this pilot project are shown that applied method may be used to monitor other common agricultural products and to control the farmer statements. © 2015 IEEE

    USING HIGH-RESOLUTION SATELLITE IMAGERY TO DETERMINE HAZELNUT PLANTED AREAS IN ISTANBUL PROVINCE

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    WOS: 000289447600027The geographical inventory of hazelnut for the region is needed both for the protection of hazelnut cultivation fields in the city master plan of Istanbul and for the implementation of the hazelnut policy of the Ministry of Agriculture. Commonly cultivated between the northern latitudes of 36' and 41' under specific climate conditions, hazelnuts are native to North Anatolia, where they have grown wildly or been cultivated for roughly 2500 years. In Istanbul, hazelnuts are cultivated to the north of the province, particularly in Site and its vicinity along the Anatolian shores of the Black Sea. This project illustrates the possibility of determining hazelnut planted areas using high-resolution satellite images. The study used as the data IKONOS pan-sharpened images acquired in June 2005 with a resolution of 4 m multispectral and 1 m pancromatic. A fusion technique was performed on the satellite images to obtain a pansharpened image with a 1-m resolution. The project uses two methods, which are classification and on-screen manual digitising. The results of the two methods were compared to test their performance

    RESEARCH ON DEVELOPMENT OF NATURAL THRESHOLD ANALYSIS MODEL FOR LAND USE DECISIONS: THE CASE OF URLA (IZMIR)

    No full text
    WOS: 000385910400039The rapid increase of human-induced environmental problems, especially the current situation in our big cities and the environmental pressure caused by them leads to destruction of our vital natural resources. With wrong land use decisions made on various scales, natural features are negatively affected, which can harm to humans and other livings and can compromise the sustainability of the natural structure. In this research, evaluations and analysis are made on land-use decisions and natural thresholds and two approaches of protective and prudence are opted for in order to carry out an assessment of natural threshold of Urla. District selected as the study area for this purpose, sets of data were taken into consideration in Urla district including conservation areas, grasslands, agricultural lands, forest areas, water surfaces and fault lines. All data are kept in a database in accordance with the rules of GIS (Geographic Information Systems) and the model generated through analysis of the natural threshold. As a result of these studies in Urla district, given the values of cardinality and density of that area, 57935.5 ha absolutely required to be protected, 3936.91 ha top priority area to be protected and 4781.89 ha areas which can be placed and can get other land use decisions. The areas were classified in three groups, and a 1/25 000-scale map of the synthesis and report were prepared. Spatial data produced as a result of this study, bear a significant base feature in controlling the compliance of existing plan decisions with natural threshold and future planning studies

    Variation of Kβ/ Kα X-ray intensity ratio and lineshape with the effects of external magnetic field and chemical combination

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    In this work, the effects caused by different chemical combination and external magnetic field in several copper and zinc compounds (Cu, CuBr, Cu2O, CuI, CuCl, Cu2Te, Cu5Si, CuSO4, CuSeO4.5H2O, CuCl2, Cu(NO3)2, CuS, CuSe, CuF2, CuF2.3H2O, CuBr2, Cu(ClO4)2.6H2O, Zn, ZnSO4.5H2O, Zn(C2H3O2)2, ZnF2, Zn(NO3)2.6H2O, ZnO, ZnS, ZnSe, ZnTe and ZnF2.4H2O) were studied using a Si(Li) detector. The samples were excited by 22.69 keV X-rays from 109Cd point radioactive source of strength 10 mCi in the external magnetic field of intensities 0.6 T and 1.2 T. The shift, asymmetry, FWHM and Kβ/Kα intensity ratio values were determined. For B = 0, the present experimental results were compared with the experimental and theoretical data in literature. The results have shown that the atomic parameters such as energy shifts, asymmetry indices, FWHM and Kβ/Kα intensity ratios can change when irradiation is conducted in a magnetic field
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