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首页> 外文期刊>Environmental Monitoring and Assessment >Object-based land-use/land-cover change detection using Landsat imagery: a case study of Ardabil, Namin, and Nir counties in northwest Iran
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Object-based land-use/land-cover change detection using Landsat imagery: a case study of Ardabil, Namin, and Nir counties in northwest Iran

机译：使用Landsat影像进行基于对象的土地利用/土地覆盖变化检测：以伊朗西北部的Ardabil，Namin和Nir县为例

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摘要

In this study, land-use/land-cover (LULC) change in the Ardabil, Namin, and Nir counties, in the Ardabil province in the northwest of Iran, was detected using an object-based method. Landsat images including Thematic Mapper (TM), Landsat Enhanced Thematic Mapper Plus (ETM+), and Operational Land Imager (OLI) were used. Preprocessing methods, including geometric and radiometric correction, and topographic normalization were performed. Image processing was conducted according to object-based image analysis using the nearest neighbor algorithm. An accuracy assessment was conducted using overall accuracy and Kappa statistics. Results show that maps obtained from images for 1987, 2002, and 2013 had an overall accuracy of 91.76, 91.06, and 93.00%, and a Kappa coefficient of 0.90, 0.83, and 0.91, respectively. Change detection between 1987 and 2013 shows that most of the rangelands (97,156.6 ha) have been converted to dry farming; moreover, residential and other urban land uses have also increased. The largest change in land use has occurred for irrigated farming, rangelands, and dry farming, of which approximately 3539.8, 3086.9, and 2271.9 ha, respectively, have given way to urban land use for each of the studied years.
机译：在这项研究中，使用基于对象的方法检测了伊朗西北部Ardabil省Ardabil，Namin和Nir县的土地利用/土地覆盖率（LULC）变化。使用了Landsat影像，包括Thematic Mapper（TM），Landsat Enhanced Thematic Mapper Plus（ETM +）和Operational Land Imager（OLI）。进行了包括几何和辐射校正以及地形归一化在内的预处理方法。使用最近邻算法，根据基于对象的图像分析进行图像处理。使用整体准确性和Kappa统计数据进行准确性评估。结果显示，从1987年，2002年和2013年的图像中获得的地图的总体准确度为91.76％，91.06％和93.00％，卡伯系数分别为0.90、0.83和0.91。 1987年至2013年之间的变化检测表明，大多数牧场（97,156.6公顷）已转变为旱作；此外，住宅和其他城市土地用途也有所增加。在灌溉农业，牧场和旱作中，土地利用发生了最大的变化，在每个研究年份中，其中分别约3539.8、3086.9和2271.9公顷已被城市土地利用所取代。

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