| 基于 SPOT-5影像的吴哥地区水体提取方法研究 |
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| 引用本文： | 杨甲,张珂,刘丽,王心源,宋经纬,刘洁,Khun-Neay Khuon.基于 SPOT-5影像的吴哥地区水体提取方法研究[J].测绘工程,2016,25(3):51-55. |
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| 作者姓名： | 杨甲 张珂 刘丽 王心源 宋经纬 刘洁 Khun-Neay Khuon |
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| 作者单位： | 安徽师范大学 国土资源与旅游学院,安徽 芜湖,241000;山东科技大学 测绘科学与工程学院,山东 青岛,266510;中国科学院 遥感与数字地球研究所数字地球重点实验室,北京,100094;柬埔寨吴哥窟世界文化遗产管理局，柬埔寨 暹粒 |
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| 摘 要： | 对于一个较小研究区提取地物信息,需要更高的空间分辨率和适合的光谱信息。以柬埔寨吴哥窟西北部为研究对象,开展基于SPOT-5影像的水体信息提取方法研究。通过分析研究区内的地物光谱特征信息,发现各地物在绿色波段和短波红外波段虽然都有下降趋势,但是水体的变化程度最大。利用这个信息建立决策树的一种水体提取模型:Band3/Band41.73并且Band1Band4。通过与NDWI法、决策树模型提取精度进行对比,证明该模型提取精度有较大提高,可有效地消除水田对提取精度的影响。
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| 关 键 词： | SPOT-5影像 水体提取 比值法 决策树法 |
Methods of water body extraction based on SPOT-5 images in Ankor Region |
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| YANG Jia,ZHANG Ke,LIU Li,WANG Xinyuan,SONG Jingwei,LIU Jie,Khun-Neay Khuon.Methods of water body extraction based on SPOT-5 images in Ankor Region[J].Engineering of Surveying and Mapping,2016,25(3):51-55. |
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| Authors: | YANG Jia ZHANG Ke LIU Li WANG Xinyuan SONG Jingwei LIU Jie Khun-Neay Khuon |
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| Abstract: | For extracting the target information from a small study area ,it requires the higher spatial resolution and suitable spectral information .An automatic water extraction method is proposed aiming at extracting drainage system from SPOT‐5 images taken at northwest Cambodia .This method is based on analyzing spectral difference between water and other objects in green band and short wave infrared band . Decision tree is adopted in this approach as a simple but efficient water extraction model :Band3/Band4>1.73 and Band1> Band4 .Comparing with NDWI and a decision tree proposed by formers’ method ,this model has higher accuracy and effectively avoids the influences from paddy field . |
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| Keywords: | SPOT-5 images water body extraction ratio method decision tree |
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