| 多时相ASAR数据的地表覆盖分类研究 |
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| 引用本文： | 曹云刚.多时相ASAR数据的地表覆盖分类研究[J].测绘科学,2007,32(5):103-105. |
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| 作者姓名： | 曹云刚 |
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| 作者单位： | 西南交通大学土木工程学院,成都,610031 |
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| 摘 要： | 本文选择了位于念青唐古拉山脉西段,覆盖范围大约100×100km2的区域,使用四个不同时期内的ASAR图像数据进行地表覆盖分类的研究。研究结果表明,虽然同种类型的地物在同一景雷达图像上的后向散射系数存在一定的差异,但是其后向散射系数随时间的变化规律却是一致的。根据地物后向散射系数的这种时相特征,我们对研究区的地表覆盖进行了分类,结果显示使用该方法能有效地区分草原、草甸、裸岩、水体、终年积雪等。
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| 关 键 词： | 遥感技术 ASAR 地表覆盖 分类 |
| 文章编号： | 1009-2307（2007）05-0103-03 |
| 修稿时间： | 2006-07-31 |
Study on land classification using multi-temporal ASAR data |
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| CAO Yun-gang.Study on land classification using multi-temporal ASAR data[J].Science of Surveying and Mapping,2007,32(5):103-105. |
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| Authors: | CAO Yun-gang |
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| Abstract: | In the past few decades,remote sensing techniques have been used widely in land study.Recently,researchers are thinking much of SAR(Synthetic Aperture Radar) technique due to abundant information in the observation.Envisat ASAR(Advanced Synthetic Aperture Radar) is one of the most popular SAR systems(such as ERS-1/2 SAR,Radarsat).Its applications include the study of snow and ice extent,land surface study,soil moisture and wetland extent,etc. Compared with single observation,multi-temporal observation supplies plenteous information of land surface.In this study,a region covered 100 100km2,located at west Nyainqntanglha mountains is selected.Land classification based on four ASAR data is performed.Results indicate that each land cover type has uniform rule of backscatter coefficient variation in different time.In other words,a land cover type can be classified with the rule uniquely.Using this classification method,grass,meadow,bare rock,ice and water can be identified distinctly;especially water and ice have excellent precision. |
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| Keywords: | remote sensing technique ASAR land cover classification |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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