Investigation of land use changes using object-oriented and pixel-based techniques (Case study: Firoozabad Khalkhal Basin)

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Ebadi Elhameh; Esfandiari Darabad Fariba; Asghari Saraskanro Sayad; Mostafazadeh Raouf; Mollanouri Elham

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Journal Paper

Paper Information

Journal: JOURNAL OF GEOGRAPHY AND PLANNING Year:2024 | Volume:28 | Issue:87 Page(s): 347-329

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Title

Investigation of land use changes using object-oriented and pixel-based techniques (Case study: Firoozabad Khalkhal Basin)

Author(s)

Keywords

Object Oriented

Support Vector Machine

Nearest neighbor

Land use

Abstract

One of the important conditions for optimal use of land is obtaining information about landuse patterns and their changes over time. Landuse is usually defined based on human use of land, emphasizing the role of land in economic activities. Today, remote sensing technology is considered as the main element in landuse monitoring. The aim of the current research is to extract landuse maps for the years 2000 and 2021 in FirozabadKhalkhal region and to investigate the changes made in the studied time period in the region using the images of ETM and OLI sensors of Landsat. Also, checking the capability of basic pixel and object-oriented methods for landuse classification is another purpose of this study. In the current research, the object-oriented technique nearest neighbor algorithm and the vector machine method supporting the pixel-based algorithm have been used for landuse classification. Then, to verify the accuracy of these two methods, the overall accuracy and Kappa were extracted. The results of this evaluation show the high accuracy of the object-oriented method in extracting land use classes. Based on the results of the detection of landuse changes in the studied time period, the highest amount of changes occurred is related to the use of good pasture to poor pasture with a value of 51.72 square kilometers, followed by forest to good pasture with a value of 30.11 and the lowest changes It is related to the use of pasture and water with the amount of 0.03 square kilometers. The reasons for these changes are the increase in population, indiscriminate grazing of livestock, incorrect and illegal use of different lands. The use of more parameters such as scale, shape, compactness, color, texture, smoothness criterion and pattern for landuse classification in the object oriented technique can be considered as an innovation of the present study.

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